Mathworks COMMUNICATIONS BLOCKSET RELEASE NOTES RELEASE NOTE

Communications Blockset™ Release Notes

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Communications Blockset™ Release Notes

The software described in this document is furnished under a license agreement. The software may be used or copied only under the terms of the license agreement. No part of this manual may be photocopied or reproduced in any form without prior written consent from The MathW orks, Inc.

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SummarybyVersion

This table provides quick access to what’s new in each version. For clarification, see “Using Release Notes” on page 2 .

Communications Blockset™ Release Notes

Version (Release)

Latest Versi V4.4 (R2010a

V4.3 (R2009b)

V4.2 (R200

V4.1 (R2008b)

V4.0 (R2008a)

V3.6 (R2

V3.5 (R2007a)

9a)

007b)

New Features and Changes

Yes

)

Details

Yes Details

Version Compatibilit Consideratio

Yes Summary

No Bug Reports

Yes Bug Reports

No Bug Repor

No Bug Reports

Yes Summary

Fixed Bugs and Known Problems

Bug Reports Includes fix

Includes fixes

Includes

Includes fixes

Bug Reports Includes fixes

fixes

Related Documentation at Web Site

Printable R elease Notes: PDF

Current product

No documentation

V3.4 (R2006b)

(R2006a)

V3.3

V3.2 (R14SP3)

V3.1 (R14SP2)

Yes Detai

Yes Details

Yes

ails

Det

Yes

Summa

Yes Summary

No Bug Reports

Yes Sum

mary

Bug Re Inclu

Bug Reports Includes fixes

Includes fixes

Bug Inc

ports

des fixes

Reports

ludes fixes

Communications Blockset™ Release Notes

Version (Release)

V3.0.1 (R14SP1)

V3.0 (R14)

V2.5 (R13)

V2.0.1 (R12.1)

V2.0 (R12)

New Features and Changes

Yes Details

Version Compatibility Considerations

Yes Summary

Fixed Bugs and Known Problems

Fixed bugs

Fixed bugs and known problems

Fixed bugs

Fixed bugs and known problems

Related Documentation at Web Site

Using Release Notes

Use release notes when upgrading to a newer version to learn about:

• New features

• Changes

• Potential impact on your existing files and practices

Review the release notes for other MathWorks™ products required for this product (for example, MATLAB bugs, or compatibility considerations in other products impact you.

If you are upgrading from a software version other than the m ost recent one, review the current release notes and all interim versions. For example, when you upg rade from V1.0 to V1.2, review the release notes for V1.1 and V1.2.

or Simulink®). Determine if enhancements,

What Is in the Release Notes

New Features and Changes

• New functionality

SummarybyVersion

• Changes to existing functionality

Version Compatibility Con si derations

When a new feature or change introduces a reported incompatibility between versions, the Compatibility Considerations subsection explains the impact.

Compatibility issues reported after the product release appear under Bug Reports at The MathWorks™ Web site. Bug fixes can sometimes result in incompatibilities, so review the fixed bugs in Bug Reports for any compatibility impact.

Fixed Bugs and Known Problems

The MathWorks offers a user-searchable Bug Reports database so you can view Bug Reports. The development team updates this database at release time and as more information becomes available. Bug Reports include provisions for any known workarounds or file replacem ents. Information is available for bugs existing in or fixed in Release 14SP2 or later. Information is not avail able for all bugs in earlier releases.

Access Bug Reports using y our MathWorks Account.

Communications Blockset™ Release Notes

Version 4.4 (R2010a) Communications Blockset Software

This table summarizes w hat is new in Version 4.4 (R2010a):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “HDL Code Generation Support” on page 4

• “Support for the For Each subsystem” on page 5

• “Sample-Based Row Vector Processing Changes” on page 5

• “New CMA Equalizer Default Setting” on page 6

• “Demos” on page 6

Fixed Bugs an d Known Problems

Bug Reports Includes fixes

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

HDL Code Generation Suppor t

Some blocks in the Communications blockset software support HDL code generation. In order to generate HDL code, you must have an HDL Coder user license. The following blocks support HDL code generation:

• BPSK Demodulator Baseband

• BPSK Modulator Baseband

• Convolutional Deinterleaver

• Convolutional Interleaver

• M-PSK Demodulator Baseband

• M-PSK Modulator Baseband

• QPSK Demodulator Baseband

Version 4.4 (R2010a) Communications Blockset™ So ftware

• QPSK Modulator Baseband

• Viterbi Decoder

Support for the For Each subsystem

You can use some Communications Blockset blocks in the Simulink For Each subsystem. When you use these blocks inside a For Each subsystem, their parameters are not tunable. See the Simulink Block Data Type Support Table for Communications Blockset for the blocks supporting this feature. For instructions on accessing the table, see Accessing the Data Type Support Table.

Sample-Based Row Vector Processing Changes

The following blocks issue a warning whe n processing sample-based row vectors:

• APP Decoder

• Convolutional Encoder

• Viterbi Decoder

• Algebraic Deinterleaver

• Algebraic Interleaver

• General Block Deinterleaver

• General Block Interleaver

• Matrix Deinterleaver

• Matrix Helical Scan Deinterleaver

• Matrix Helical Scan Interleaver

• Matrix Interleaver

• Random Deinterleaver

• Random Interleaver

• M-PAM Modulator Baseband

• Rectangular QAM Modulator Baseband

Communications Blockset™ Release Notes

• DQPSK Modulator Baseband

• M-DPSK Modulator Baseband

• M-PSK Modulator Baseband

• OQPSK Modulator Baseband

• QPSK Modulator Baseband

• M-FSK Modulator Baseband

• CPFSK Modulator Baseband

• CPM Modulator Baseband

• Insert Zero

• Puncture

• Bit to Integer Converter

• Integer to Bit Converter

Compatibility Considerations

A future release will remove sample-based row vector support from these blocks. Use sample-based column vectors instead.

New CMA Equalizer Default Setting

The CMA E qu a lizer block has a new default setting. The Signal constellation parameter now defaults to QPSK, producing a signal with

a constant modulus.

Compatibility Considerations

If yo ur models rely on the previous default setting of 16 QAM for the Signal constellation parameter, this change may introduce an incompatibility.

Demos

Additional demo s and demos with updates fo r this release:

• This release contains a new demo, HDL Support for Viterbi Decoder, which

illustrates HD L code generation using the Viterbi Decoder.

Version 4.4 (R2010a) Communications Blockset™ So ftware

• This release contains updates to the IEEE® 802.16-2004 OFDM PHY

Link, Including Space-Time Block Coding demo. The demo now includes digital pre-distortion (DPD), showing how to compensate for memoryless nonlinearity,AM/AM,andAM/PMofanRFamplifier.

Communications Blockset™ Release Notes

Version 4.3 (R2009b) Communications Blockset Software

This table summarizes w hat is new in Version 4.3 (R2009b):

New Features and Changes

Yes Details below

Version Compatibility Considerations

No Bug Reports

New features and changes introduced in this version are

• “Error Vector Magnitude (EVM) Measurement Block” on page 8

• “Modulation Error Ratio (MER) Measurement Block” on page 9

• “Enumerated Data Type Support” on page 9

• “New Demos” on page 10

Fixed Bugs an d Known Problems

Includes fixes

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

Error Vector Magnitude (EVM) Measurement Block

Error Vector Magnitude (EVM) provides a measurement of modulator or demodulator performance in the presence of impairments. Essentially, EVM is the vector difference at a given time between the ideal (transmitted) signal and the measured (received) signal. The EVM Measurement block contains a normalization option that calculates RMS EVM based on the specific requirements of different industry standards. You select which normaliza tion method the block uses to perform EVM calculations. The block can normalize to the average reference signal power, average constellation power, or peak constellation power.

EVM measurem ents can help identify sources of signal degradation, such as: phase noise, I-Q imbalance, amplitude nonlinearity, and filter distortion. You can also use EVM measurements to determine system p erformance in communications applications. For example, determining if an EDGE system conforms to the 3GPP radio transmission standards requires measuring accurate RMS EVM, Peak EVM, and 95th percentile values.

Version 4.3 (R2009b) Communications Blockset™ So ftware

For more information, see the EVM Measureme nt help page.

Modulation Error Ratio (MER) Measurement Block

Modulation Error Ratio (MER) is a measurement of the signal-to-noise ratio (SNR) in digital modulation applications. You can use this measurement to determine system performance in communications applications. The block measures MER in decibels (dB). For consistency, the unit of measure for Minimum MER and Percentile MER measurements also appear in decibels.

For more information, see the MER M easurement help page.

Enumerated Data Type Support

Limited support for enumerated data types is now available. The following blocks suppo rt enumerated data types as of this release:

• Algebraic Deinterleaver

• Algebraic Interleaver

• Deinterlacer

• Find Delay

• General Block Deinterleaver

• General Block Interleaver

• Matrix Deinterleaver

• Matrix Interleaver

• Insert Zero

• Interlacer

• Matrix Helical Scan Deinterleaver

• Matrix Helical Scan Interleaver

• Puncture

• Random Deinterleaver

• Random Interleaver

Communications Blockset™ Release Notes

See“UsingEnumeratedData”intheSimulink documentation for more information about enumerated data types.

New Demos

The following demo is new in this release.

•

Defense Communications: US MIL-STD-188-11 0A Receiver

Version 4.2 (R2009a) Communications Blockset™ So ftware

Version 4.2 (R2009a) Communications Blockset Software

This table summarizes w hat is new in Version 4.2 (R2009a):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Orthogonal STBC Capability” on page 11

• “Constellation Visualization for Linear Modulator Blocks” on page 12

• “New Rounding Modes for M-PAM, R-QAM, and OQPSK Demodulator

blocks” on page 12

• “Support for Convergent Rounding, Simplest Rounding, and MATLAB-Style

Rounding Modes” on page 12

• “Fading Channel Blocks Now Support Bell-shaped Doppler spectrum” on

page 13

• “DPSK Modulator Baseband Block Enhancements” on page 13

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

Orthogonal STBC Capability

Communications Blockset now includes Orthogonal Space-Time Block Coding (OSTBC) Combiner and Encoder blocks. Space-time block coding is an accepted multiple-input multiple-output (MIMO) technology adopted by standards for both indoor and outdoor environments. The addition of these blocks allows you to model systems for emerging MIMO standards. For more information, see the OSTBC Combiner and OSTBC Encoder help pages.

Communications Blockset™ Release Notes

Constellation V isualization for Linear Modulator Blocks

The linear modulator blocks now provide the capability to visualize a signal constellation from the block mask dialog. The following blocks support constellation visualization:

• BPSK Modulator Baseband

• General QAM Modulator Baseband

• M-PAM Modulator Baseband

• M-PSK Modulator Baseband

• QPSK Modulator Baseband

• Rectangular QAM Modulator Baseband

New Rounding Modes for M-PAM, R-QAM, and OQPSK Demodulator blocks

The Rounding mode parameter on the M-PAM, R-QAM, and OQPSK modulator blocks now have two additional options,

Zero and Ceiling.

•

Ceiling rounds the result of a calculation to the closest representable

number in the direction of positive infinity.

•

Zero rounds the result of a calculation to the closes t representable number

in the direction of zero.

Support for Convergent Rounding, Simplest Rounding, and MATLAB-Style Rounding Modes

Communications filter blocks, digital baseband amplitude modulation, and digital baseband phase modulation blocks now support convergent rounding mode and simple rounding mode.

• Gaussian Filter

• General QAM Demodulator Baseband

• Ideal Rectangular Pulse Filter

• Integrate and Dump

Version 4.2 (R2009a) Communications Blockset™ So ftware

• M-PAM Demodulator Baseband

• OQPSK Demodulator Baseband

• Raised Cosine Transmit Filter

• Raised Cosine Receive Filter

• Rectangular QAM Demodulator Baseband

• Windowed Integrator

Fading Channel Blocks Now Support Bell-shaped Doppler spectrum

The Multipath Rayleigh Fading Channel block and the Multipath Rician Fading Channel block now support bell-shaped Doppler spectrum.

DPSK Modulator Baseband Block Enhancements

Compatibility Considerations

When selecting Single as the Output Data Type for the M-DPSK Modulator Baseband, DBPSK Modulator Baseband, or DQPSK Modulator Baseband, the block produces an output value that varies slightly from previous releases.

Communications Blockset™ Release Notes

Version 4.1 (R2008b) Communications Blockset Software

This table summarizes w hat is new in Version 4.1 (R2008b):

New Features and Changes

Yes Details below

Version Compatibility Considerations

No Bug Reports

New features and changes introduced in this version are

• “Providing Polyphase Decimatio n in the Raised Cosine Receive Filter

Block” on page 14

• “Initialization Enhancements to BCH blocks” on page 15

• “New Doppler Spectrum Capabilities for Rayleigh and Rician Fading

Channels” on page 15

• “Per Path Specification For Rician Channels” on page 16

• “Code Generation Support for Signals Greater than 32 Bits” on page 16

• “Convolutional Encoder Changes” on page 1 6

• “New Data Support Table” on page 16

Fixed Bugs an d Known Problems

Includes fixes.

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

• “Support for Normal Mode Model Reference” on page 17

• “Demos” on page 17

Providing Polyphase Decimation in the Raised Cosine Receive Filter Block

Polyphase decimation improves the filter efficiency in terms of simulation speed and quality of code generation.

The block uses FIR decimation under the mask if Offset sample is set to

zero offset or Framing is set to Maintain input frame size.

Version 4.1 (R2008b) Communications Blockset™ So ftware

The block uses Digital filter under the mask when Framing is set to Mainta in

input frame rate

and Offset sample is set to a non–zero number.

Initialization Enhancements to BCH blocks

The BCH Encoder and Decoder block masks now contain the Disable generator polynomial checking option.

Each time a model initializes, the BCH Encoder or Decoder block performs a polynomial check. Selecting Disable generator polynomial checking disables the polynomial check. For larger codes, disabling the check speeds u p the simulation process.

Refer to the BCH Encoder or BCH Decoder help page for more information.

New Doppler Spectrum Capabilities for Rayleigh and Rician Fading Channels

In addition to Jakes Doppler spectrum (which previous software versions support), the Multipath Rayleigh Fading Channel block and M ultipath Rician Fading Channel block now support the following Doppler spectrum shapes per path:

• Jakes restricted

• Jakes asymmetrical

• Flat

• Rounded

• Gaussian

• Bigaussian

Additionally, you can now specify different Doppler spectrum shapes f or each path in the model.

For more information, refer to the Multipath Rayleigh Fading Channel block and Multipath Rician Fading Channel block help pages.

Communications Blockset™ Release Notes

Per Path Specification For Rician Channels

The Multipath Rician Fading Channel block now contains vector Rician, K-Factor, and doppler shift parameters, allowing the different Rician paths to be faded using different parameters.

Previously, only the first path in a multipath channel had Rician attributes. With this upgrade you can specify Rician attributes for each path in the channel.

Code Generation Support for Signals Greater than 32 Bits

C co de generation and the Simulink Accelerator and Rapid Accelerator modes are now supported for fixed-point and integer word lengths up to 128 bits. In other words , you can now generate code for anything you can simulate using Communications Blockset™ blocks.

Convolutional Encoder Changes

The Convolutional Encoder block contains two new parameters: Output final state and Specify initial state via input port.

Output final state is available for all operation modes e xcept

trellis by appending bits

output signal specifies the output state for the block.

Specify initial state via input port is only available in operation mode. When you select Specify initial state via input port the input signal specifies the starting state for every frame in the block.

.WhenyouselectOutput final state,the

Terminate

Truncated

New Data Support Table

The Communications Blockset Data Type Su p po rt Table is now available through the Simulink model Help menu. The table provides information about data type support and code generation coverage for all Communications Blockset blocks. To access the table, select Help > Block Support Table > Communications Blockset or Help > Block Support Table > All Tables.

Version 4.1 (R2008b) Communications Blockset™ So ftware

Support for Normal Mode Model Reference

The Communications Blockset now supports Normal Mode Model Reference.

Demos

Additional demo s and demos with updates fo r this release:

Anew

Updates to the following demos:

• Updates to

• Updates to IEEEﬁ 802.16-2004 OFDM PHY Link, Including Space-Time

• Updates to Soft Decision GMSK Demodulator gmsk soft decision

tail-biting demo.

DVB-S2 Link, Including LDPC Coding dvbs 2

Block Coding wman80216

Communications Blockset™ Release Notes

Version 4.0 (R2008a) Communications Blockset Software

This table summarizes w hat is new in Version 4.0 (R2008a):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Fixed Point Support for New Blocks” on page 18

• “Integer to Bit Converter and Bit to Inte ger Converter Blocks Enhanced”

on page 19

• “Asynchronous Signal Support” on page 19

• “Bipolar to Unipolar Converter a nd Unipolar to Bipolar Converter Blocks

Enhanced” on page 19

• “Demos” on page 19

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

Fixed Point Support for N ew Blocks

The following blocks now support fixed-point data types:

• General QAM Demodulator Baseband

• Gold Sequence Generator

• Integrate and Dump

• OQPSK Demodulator Baseband

Version 4.0 (R2008a) Communications Blockset™ So ftware

Integer to Bit Co Blocks Enhanced

New default Inhe type parameter blocks.

These blocks a or unsigned bi are Treat inp Bit to Intege

resulting in

Asynchrono

Asynchron product.

ous signal support has been added to the Communications Blockset

Bipolar t Bipolar C

New defa type par Convert

ult

ameter on the Bipolar to Unipolar Converter and Unipolar to Bipolar

er blocks.

rit via internal rule

on Integer to Bit Converter and Bit to Integer Converter

lso contain new parameters that specify bit ordering and signed

t formatting. The new parameters for Integer to Bit Converter

ut values as and Output bit order. The new parameters for

rConverterareInput bit order and After bit packing, treat

teger as.

us Signal Support

o Unipolar Converter and Unipolar to

onverter Blocks Enhanced

Inherit via internal rul e mode added to the Output data

nverter and Bit to Integer Converter

mode added to the Output data

Demos

Demos a

• The

dded or updated for this release:

aptive Equalization Using Fixed Point

demo i mode soft

perf by a

use

llustrates how to implement fix ed -poin t signal processing with

ls that use the Embedded MATLAB Function block in Simulink

ware to construct equalizers.

assband Modulation

orm passband modulation, by multiplying a modu l ated c omplex signal

complex sine wave to perform frequency upconversion..

LLR vs. Hard Decision Demodulation demo now illustrates how to

quantized soft decision demodulation.

Embedded MATLAB

demo illustrates a straightforward way to

Communications Blockset™ Release Notes

All Communications Blockset demos now work with Rapid Accelerator mode, except the following:

• Bluetooth Full Duplex Voice and Data Transmission

• Adaptive Equalization: LMS, RLS, and CMA

• GMSK vs. MSK

• Fixed-Point MSK Modulation/Demodulation (FPRA Platform)

• Increasing NCO Spurious-Free Dynamic Range (SFDR) by using a PN

Sequence Dither Source and Tw o-Stag e Phase Quantization

• IEEE 802.11b WLAN PHY 1Mbps, 2Mbps, 5.5Mbps, or 11Mbps

A known limitation of the Rapid Accelerator mode is that models using multiratescopesdonotrefreshwhenchangesaremade.

Version 3.6 (R2007b) Communications Blockset™ So ftware

Version 3.6 (R2007b) Communications Blockset Software

This table summarizes w hat is new in Version 3.6 (R2007b):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “BPSK, MPSK, and QPSK Demodulator Blocks Enhanced” on page 21

• “Reed Solomon and BCH Blocks Enhanced with Punctures and Erasures”

on page 22

• “New Demos” on page 22

• “PN Sequence Generator Block Enhanced” on page 22

• “TCM Encoder Blocks Enhanced” on page 22

• “Integer to Bit Converter and Bit to Inte ger Converter Blocks Enhanced”

on page 23

• “Find Delay Block Enhanced” on page 23

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

Printable Release Notes: PDF

Current product documentation

• “TCM Decoder Blocks Enhanced” on page 23

BPSK, MPSK, and QPSK Demodulator Blocks Enhanced

The B PSK Demodulator Baseband and QPSK Demodulator Baseband blocks are enhanced with fixed-point capabilities and run significantly faster in many hard-decision use cases. The M-PSK Demodulator Baseband block is enhanced with fixed-point capabilities for M=8. Se e individual reference pages for floating-point and fixed-point signal-flow diagrams.

Communications Blockset™ Release Notes

Reed Solomon and Punctures and Er

The Integer-Inp blocks are enha

The Integer-O Decoder block

ut RS Encoder, Binary-Input RS Encoder, and BCH Encoder

nced with punctures.

utput RS Decoder, Binary-Output RS Decoder, and BCH

s a re enhanced with punctures and erasures.

asures

New Demos

commrseras i

shortening

commdvbc mo

Institute televisio

commncop

and multi oscillat

commwma

physica to the IE

llustrates Reed-Solomon coding with erasures, punctures, and

dels part of the ETSI (European Telecommunications Standards

) EN 300 429 standard for cable system transmission of digital

nsignals.

nseqdither

-stage phase quantization in the design of numerically controlled

ors. Simulink Fixed Point is needed to run this demo.

n80216d_stbc

l layer of a wireles s metropolitan area network (WMAN) according

EE 802.16-2004 standard.

illustrates the use of pseudorandom noise sequences

represents an end-to-end baseband model of the

BCH Blocks Enhanced with

These c typing

PN Seq

PN Se smal

TCM E

The TCM

an be accessed through the demos pane of the Help browser, or by

the model name (e.g.,

commncopnseqdither) at the command line.

uence Generator Block Enhanced

quence Generator block is enhanced with bit-packing options and

lest integer output data type mode.

ncoder Blocks Enhanced

M-PSK TCM Encoder, Rectangular QAM TCM Encoder, and General

Encoder blocks are enhanced with options to terminate at the zero state.

Version 3.6 (R2007b) Communications Blockset™ So ftware

Integer to Bit Co

nverter and Bit to Integer Converter

Blocks Enhanced

The Integer to Bi handle Number o

Find Delay Blo

The Find Delay

TCM Decoder B

The algorit QAM TCM Deco with the Vit

Compatibility Considerations

Due to the from thes

e blocks may be different from those of previous releases.

t Converter and Bit to Integer Converter blocks can now

fbitsperintegervalues up to 32.

ck Enhanced

block is enhanced to support unsigned integer inputs.

locks Enhanced

hm of the TCM decoder blocks (M-PSK TCM Decoder, Rectangular

der, and General TCM Decoder) is updated to be consistent

erbi Decoder block’s decoding algorithm.

stochastic nature of the output of these blocks, the exact results

Communications Blockset™ Release Notes

Version 3.5 (R2007a) Communications Blockset Software

This table summarizes w hat is new in Version 3.5 (R2007a):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “New LDPC Encoder and Decoder Blocks” on page 25

• “Fixed-Point Capabilities Added to Rectangular QAM Demodulator Block”

on page 25

• “Bitwise Soft-Decision Outputs Enabled for General QAM Demodulator

Block” on page 25

• “Various Blocks Enhanced to Accept Fixed-Point Data Types” on page 25

• “BCH Encoder and Decoder Blocks Allow User Specification of Primitive

and Generator Polynomials” on page 26

• “Default Output D ata Type Settings Added to AM/PM Demodulator Blocks”

on page 26

• “New Default Output Data Type Option Added to Viterbi Decoder Block”

on page 27

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

• “M-FSK Modulator Block Errors When Used with Sample-Based Signals

and Multitasking Solver” on page 27

• “PN Sequence Generator Block Allows Mask Bits from Input Port” on

page 27

• “Binary-Output RS Decoder and Binary-Input RS Encoder Blocks

Enhanced” on page 27

Version 3.5 (R2007a) Communications Blockset™ So ftware

New LDPC Encoder

The LDPC Encoder onthesamealgor

fec.ldpcenc.

Fixed-Point C Demodulator B

The Rectangu capabilitie

s for hard-decision square QAM modes.

Bitwise Sof QAM Demodul

Bitwise so Baseband b

ft-decision outputs are enabled for the General QAM Demodulator

lock.

Various B

and LDPC Decoder blocks are added. These are based

ithms used in the Communications Toolbox functions

apabilities Added to Rectangular QAM

lock

lar QAM Demodulator Baseband block no w has fixed-point

t-Decision Outputs Enabled for General

ator Block

locks Enhanced to Accept Fixed-Point Data

Types

The oper fixed-p

• Raised

ational parameters of the following filters can now be adjusted for

oint data types:

Cosine Transmit Filter

and Decoder Blocks

• Raised

• Gaussi

• Ideal

• Windo

The C

The E

es.

typ

Cosine Receive Filter

an Filter

Rectangular Pulse Filter

wed Integrator

onvolutional Encoder block now accepts a nd outputs

rror Rate Calculation is upgraded to accept inputs of fixed-point data

ufix1.

Communications Blockset™ Release Notes

BCH Encoder and D Specification o

The BCH Encoder a the primitive a

They have also

Default Outp Demodulator

The option ' option, and

• M-PAM Demod

• Rectangul

• General QA

• M-PSK Dem

• BPSK Demo

• QPSK Dem

• OQPSK De

Inherit via internal rule'

is set to be the default setting in the following blocks:

ar QAM Demodulator Baseband

M Demodulator Baseband

odulator Baseband

modulator Baseband

f Primitive and Generator Polynomials

nd BCH Decoder blocks now allow user specification of

nd generator polynomials.

been enhanced to speed up initialization.

ut Data Type Settings Added to AM/PM

Blocks

ulator Baseband

odulator Baseband

dulator Baseband

ecoder Blocks Allow User

is added to the output data-type

• M-DPSK

• DBPSK D

• DQPSK

See in

e are no compatibility issues, as only new instances of the block will be se t

Ther

e default output, leaving the settings of currently used blocks unchanged.

to th

Demodulator Baseband

emodulator Baseband

Demodulator Baseband

dividual block reference pages for details.

Version 3.5 (R2007a) Communications Blockset™ So ftware

New Default Output Data Type Option Added to Viterbi Decoder Block

The option 'Inherit via internal rule' is added to the output data-type option in the Viterbi Decoder block, and is set to be the default setting. See block reference page for details.

There are no compatibility issues, as on ly new instances of the block will be set to the default output, leaving the settings of currently used blocks unchanged.

M-FSK Modulator Block Errors When Used with Sample-Based Signals and Multitasking Solver

This change was m ade to ensure that the M-FSK Modulator block produces correct output.

Compatibility Considerations

With this change, a model with the M-FSK Modulator block will not run if it is used for sampled-based signals with Tasking mode for periodic sample

times set to mode for periodic sample times (in Simulation > Configuration Parameters > Solver) should be set to

Auto or MultiTasking. For sample-based input signals, Tasking

SingleTasking.

PN Sequence Generator Block Allows Mask Bits from Input Port

An option is added to the PN Sequence Generator block that gives the choice of providing output mask information through either the block dialog or an input port.

Binary-Output RS Decoder and Binary-Input RS Encoder Blocks Enhanced

The Binary-Output RS Decoder and Binary-Input RS Encoder blocks now have the option of inheriting their output data type from their input.

Communications Blockset™ Release Notes

Version 3.4 (R2006b) Communications Blockset Software

This table summarizes w hat is new in Version 3.4 (R2006b):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Fixed Point Capability Added to Various B lo c ks” on page 28

• “Bitwise Soft-Decision O utp u ts for the PSK and Rectan g ular QAM

Demodulator” on page 29

• “BCH Encoder and Decoder Run Faster and O perate on Shortened BCH

Codes” on page 29

• “Fixed-Point MSK Demo” on page 29

• “Binary Error Pattern Generator Block Is Ob soleted” on page 29

• “Version 1.5 Blocks R emo ved” on page 30

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

• “Obsolete Blocks” on page 30

Fixed Point Capability Added to Various Blocks

Fixed point capability is added to the following blocks:

• M-PAM Modulator Baseband

• M-PAM Demodulator Baseband

• Rectangular QAM Modulator Baseband

Version 3.4 (R2006b) Communications Blockset™ So ftware

• General QAM Modulator Baseband

• M-PSK Modulator Baseband

• BPSK Modulator Baseband

• QPSK Modulator Baseband

• OQPSK Modulator Baseband

• Viterbi Decoder

Bitwise Soft-Decision Outputs for the PSK and Rectangular QAM Demodulator

Bitwise soft-decision outputs are enabled for the M-PSK Demodulator Baseband, B-PSK Demodulator Baseband, QPSK Demodulator Baseband, and Rectangular QAM Demodulator Baseband blocks.

BCH Encoder and Decoder Run Faster and Operate on Shortened BCH Codes

BCH Encoder and Decoder blocks run f as te r and are enhanced to operate on shortened BCH codes.

Fixed-Point MSK Demo

A demo that illustrates the baseband implementation of a fixed-point MSK modulator and demodulator is added. This can be accessed through the demos pane of the Help browser, or by typing

commmsk at the comm and line.

Binary Error Pattern Generator Block Is Obsoleted

The Binary Error Pattern Generator block is obsoleted.

Compatibility Considerations

It now resides in the library cbobsv3, which is obsolete and may be removed in the future.

Communications Blockset™ Release Notes

Version 1.5 Bloc

All the librarie

1.5 have been rem

•

commanabbnd

• commanapbnd

• commblkcod

• commchan

• commcnvcod

• commdigbbn

• commdigpbn

• commsink

• commsourc

• commsrcc

• commsync

• commuti

s and blocks associated with Communications Blockset version

ks Removed

oved from the product. These libraries are as follows.

Compatibility Considerations

These b Blocks functi

locks cannot be used with the current version of the Communications

et. The current version of the blockset provides some of the

onality in upg ra de d blocks.

Obsol

The b

To ac

Repl

ete Blocks

locks in the following table have been obsoleted since version 3.0.

cess each replacement block, type the library name l is ted in the

acement Block Library column at the MATLAB command line.

Version 3.4 (R2006b) Communications Blockset™ So ftware

Obsolete Block

Binary Error Pattern Generator

DSB AM Demodulator Passband

DSB AM Modulator Passband

DSBSC AM Demodulator Passband

DSBSC AM M odulator Passband

FM Dem odulator Passband

FM Modulator Passband

PM Dem odulator Passband

PM Modulator Passband

SSB AM Demodulator Passband

SSB AM Modulator Passband

Rayleigh Fading Channel

Rician Fading Channel

M-PAM Demodulator Baseband

Obsolete Block Library Replacement Block

cbobsv3

commanapbnd2

None

DSB AM Demodulator Passband

commanapbnd2

DSB AM Modulator Passband

commanapbnd2

DSBSC AM Demodulator Passband

commanapbnd2

DSBSC AM Modulator Passband

commanapbnd2

FM Demodulator Passband

commanapbnd2

FM Modulator Passband

commanapbnd2

PM Demodulator Passband

commanapbnd2

PM Modulator Passband

commanapbnd2

SSB AM Demodulator Passband

commanapbnd2

SSB AM Modulator Passband

commchan2

Multipath Rayleigh Fading Channel

commchan2

Multipath Rician Fading Channel

commdigbbndam2

M-PAM Demodulator Baseband

Replacement Block Library

N/A

commanapbnd3

commchan3

commdigbbndam3

Communications Blockset™ Release Notes

Obsolete Block

M-PAM Modulator Baseband

Rectangular QAM Demodulator Baseband

Rectangular QAM Modulator Baseband

General Q AM Demodulator Baseband

General Q AM Modulator Baseband

BPSK Demodulator Baseband

BPSK M odulator Baseband

DBPSK Demodulator Baseband

DBPSK Modulator Baseband

DQPSK Demodulator Baseband

DQPSK Modulator Baseband

M-DPSK Demodulator Baseband

M-DPSK Modulator Baseband

M-PSK Demodulator Baseband

Obsolete Block Library Replacement Block

commdigbbndam2

M-PAM Modulator Baseband

commdigbbndam2

Rectangular QAM Demodulator Baseband

commdigbbndam2

Rectangular QAM Modulator Baseband

commdigbbndam2

General QAM Demodulator Baseband

commdigbbndam2

General QAM Modulator Baseband

commdigbbndpm2

BPSK Demodulator Baseband

commdigbbndpm2

BPSK Modulator Baseband

commdigbbndpm2

DBPSK Demodulator Baseband

commdigbbndpm2

DBPSK Modulator Baseband

commdigbbndpm2

DQPSK Demodulator Baseband

commdigbbndpm2

DQPSK Modulator Baseband

commdigbbndpm2

M-DPSK Demodulator Baseband

commdigbbndpm2

M-DPSK Modulator Baseband

commdigbbndpm2

M-PSK Demodulator Baseband

Replacement Block Library

commdigbbndam3

commdigbbndpm3

Version 3.4 (R2006b) Communications Blockset™ So ftware

Obsolete Block

M-PSK Modulator Baseband

OQPSK Demodulator Baseband

QPSK M odulator Baseband

Compatibility Considerations

Although they are currently still shipped with the product, they may be removed in future versions of the Communications Blockset. We recommend that yo u use the replacement blocks listed in the third column.

Obsolete Block Library Replacement Block

commdigbbndpm2

M-PSK Modulator Baseband

commdigbbndpm2

OQPSK Demodulator Baseband

commdigbbndpm2

OQPSK Demodulator Baseband

commdigbbndpm2

QPSK Modulator Baseband

commdigbbndpm2

QPSK Modulator Baseband

Replacement Block Library

commdigbbndpm3

Communications Blockset™ Release Notes

Version 3.3 (R2006a) Communications Blockset Software

This table summarizes what’s new in Version 3.3 (R2006a):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Rician Channel Block Enhanced” on page 34

• “Channel Visualization Added to Multipath Rician Fading Channel Block”

on page 35

• “Viterbi Decoder Block Updated with Puncturing and E rasing” on page 35

• “Convolutional Encoder B lock Updated” on page 35

• “M-PSK and Rectangular QAM Blocks Enhanced” on page 35

• “Demodulator Blocks Enhanced” on page 35

• “Additional C Data Type Support” on page 35

• “Phase/Frequency Offset Block Enhanced” on page 36

• “Reed Solomon Decoder Block Enhanced” on page 36

• “DVBS2 Demo” on page 36

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

• “Obsolete Block Warning” on page 36

• “Rician Fading Channel Block Is Obsoleted” on page 36

• “SSB AM Passband B lock Output” on page 36

• “saveas_commblks Obsoleted” on page 37

Rician Channel Block Enhanced

The Multipath Rician Fading Channel block is updated with a new algorithm that is more accurate. The block can now simulate a line-of-sight Doppler

Version 3.3 (R2006a) Communications Blockset™ So ftware

component that is independent from the Doppler of the diffuse components. Sample time is now inherited.

Channel Visualization Added to M ultipath Rician Fading Channel Block

Added an option to the Multipath Rician Fading Channel block that allows for use of the channel visualization tool.

Viterbi Decoder Block Updated with Puncturing and Erasing

The Viter bi Decoder block now decodes codewords with punctures and/or erasures.

Convolutional Encoder Block Updated

The Convolutional Encoder block now outputs punctured codewords.

It is also updated to allow trellis termination by appending tail bits.

M-PSK and Rectangular QAM Blocks Enhanced

The M-PSK Modulator Baseband, M-PSK Demodulator Baseband,

Rectangular QAM Modulator Baseband,andRectangular QAM Demodulator Baseband

user-defined constellation mapping.

(only for square QAM) blocks now have an option for

Demodulator Blocks Enhanced

The M-PSK Demodul ator Baseband, Rectangular QAM Demodulator

Baseband Demodulator Baseband

enhanced to run significantly faster.

(for square QAM only), BPSK Demodulator Baseband, QPSK

,andM-PAM Demodulator Baseband blocks are

Additional C Data Type Support

Many blocks are updated to support C data types. See “Data Type Support” and individual block reference pages for details.

Communications Blockset™ Release Notes

Phase/Frequency Offset Block Enhanced

The Phase/Frequency Offset block now accepts the frequency offset information through an input port.

The new block operates without any delay (the previous version had a sample delay of 1), and now accepts real inputs in addition to complex inputs. It acceptsinputsofdatatype matches that of its input.

Reed Solomon Decoder Block Enhanced

The Reed Solomon Decoder block is enhanced to run significantly faster.

DVBS2 Demo

The demo dvbs2 is added, showcasing the state-of-the-art channel coding scheme used in the second generation Digital Video Broadcasting standard (DVB-S.2).

double or single, and its output data type

Obsolete Block Warning

Added a feature that warns you of the existence of obsolete Communications blocks when a model is opened.

Rician Fading Channel Block Is Obsoleted

The Rician Fading Channel block has been obsoleted. Its replacement, the Multipath Rician Fading Channel block, is found in

commchan3.

Compatibility Considerations

It now resides in the library co mmchan2, which is obsolete and may be removed in the future.

SSB AM Passband Block Output

The SSB AM Modulator Passband and SSB AM Demodulator Passband blocks now output signals whose d imensions match those of their inputs.

Version 3.3 (R2006a) Communications Blockset™ So ftware

Compatibility Considerations

Previously, inputs with dimensions [1] and [1x1] would result in outputs with dimension dimensions

[1]. For such inputs, the blocks will now output signals with

[1] and [1x1],respectively.

saveas_commblks Obsoleted

The Communications Blockset has a saveas_commblks utility function to migrate models to previous releases. This is now obsoleted.

Compatibility Considerations

Simulink provides a similar f unctionality through its Save As... option in the File menu of its models, as well as its function

save_system.

Although recommend that the Simulink functionality be used, as not be updated in the future.

saveas_commblks will continue to work in this release, we

saveas_commblks will

Communications Blockset™ Release Notes

Version 3.2 (R14SP3 ) Communications Blockset Software

This table summarizes what’s new in Version 3.2 (R14SP3):

New Features and Changes

Yes Details below

Version Compatibility Considerations

No Bug Reports

New features and changes introduced in this version are

Fixed Bugs an d Known Problems

Includes fixes.

Related Documentation at Web Site

Analog Modulation Library Enhancement

The blocks in the Analog Modulation library now implement the formulas used in the Communications Toolbox to produce more consistent results.

Many Blocks Updated to Generate Embeddable Real-Time Workshop C-Code

Many blocks are updated to produce optimized embeddable Real-Time Workshop

C-code. See Data Type Support for details.

Many Blocks Updated to Work Within Triggered Subsystems

Many blocks are updated to work within triggered subsystems. See “Data Type Support” for details.

Additional C Data Type Support

Many blocks are updated to support C data types. See “Data Type Support” and individual block reference pages for details.

Version 3.2 (R14SP3) Communications Blockset™ Software

Two Parameters Now Tunable for Error Rate Calculation Block

The two parameters Target number of errors and Maximum number of symbols are now tunable during simulations and for RSIM executables.

New Demo of Timing Recovery Using Fixed-Rate Resampling

Anewdemo,timrec_resample, illustrates symbol timing adjustments using interpolation and numerically-controlled oscillator (NCO) based control as part of clock recovery in a digital modem.

Communications Blockset™ Release Notes

Version 3.1 (R14SP2 ) Communications Blockset Software

This table summarizes what’s new in Version 3.1 (R14SP2):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Channel Visualization Added to Multipath Rayleigh Fading Channel

Block” on page 40

• “Multipath Rayleigh Fading Channel Block Performance Improvement”

on page 41

• “26 Blocks Generate Embeddable Real-Time Workshop C-code” on page 41

• “C Data Type Support for 26 Blocks” on page 42

• “Some Blocks Now Work in a Triggered Subsystem” on page 42

• “New Gardner Symbol Timing Recovery Demo” on page 42

• “commdigbbndam2 and commdigbbndpm2 Libraries Updated” on page 43

• “Improvements and Changes to the Multipath Rayleigh Fading Channel

Block” on page 43

• “Discrete-Time VCO Block” on page 43

Fixed Bugs an d Known Problems

Bug Reports Includes fixes.

Related Documentation at Web Site

• “Voltage Controlled Oscillator Block Renamed to Continuous-Time VCO”

on page 44

• “CPM Modulator Baseband and GM S K Modulator Baseband Blocks” on

page 44

Channel Visualization Added to Multipath Rayleigh Fading Channel Block

Added a channel visualization option to the Multipath Rayleigh Fading Channel block, which allows for use of the new channel visualization tool.

Version 3.1 (R14SP2) Communications Blockset™ Software

Multipath Rayle Performance Imp

Increased the si Channel block b

26 Blocks Gene Workshop C-co

In this relea optimized em

• AWGN Channe

Channels li

• Integrate

• Error Rate

• Poisson I

• Kasami Se

Sequence

• Convolu

Coding s

• Binary

Decode sublib

-Input RS Encoder, Integer-Input RS Encoder, Binary-Output RS

rary

gnal processing speed for the Multipath Rayleigh Fading

y a factor of 2 to 10.

rate Embeddable Real-Time

se, the following b locks are now inlined, and will produce

beddable Real-Time Workshop C-code. See for details.

l and Multipath Rayleigh Fading Channel blocks in the

brary

and Dump block in the Communications Filters library

Calculation block in the Communications Si nk s library

nteger Generator block in the Random Data Sources sublibrary

quence Generator and PN Sequence Generator blocks in the

Generators sublibrary

tional Encoder and Viterbi Decoder blocks in the Convolutional

ublibrary

r, and Integer-Output RS Decoder blocks in the Block Coding

igh Fading Channel Block

rovement

• All bl

• All b

• Int

• Bit

ocks in the Block Interleaving sublibrary

ocks in the Convolutional Interleaving sublibrary

ocks in the Digital Baseband Amplitude Modulation sublibrary

locks in the Digital Baseband Frequency Modulation sublibrary

locks in the Digital Baseband Phase Modulation sublibrary

erlacer, De interlace r, Puncture, Insert Zero, and Derepeat b lo cks in the

uence Operations library

Seq

-to-Integer Converter and Integer-to-Bit Converter blocks in the

ilities library

Communications Blockset™ Release Notes

C Data Type Support for 26 Blocks

Added Native C data type support for the same 26 S-functionslistedabove. Updated six complete demos to include this new support.

Some Blocks Now Work in a Triggered Subsystem

Updated the following blocks so that they will n ow work in a triggered subsystem:

• Integrate and Dump block in the Communications Filters library

• Error Rate Calculation block in the Communications Sinks library

• All blocks in the Random Data Sources sublibrary

• All blocks in the Noise Generators sublibrary

• All blocks in the Sequence Generators sublibrary

• All blocks in the Block Coding sublibrary

• Convolutional Encoder and Viterbi Decoder blocks in the Convolutional

Coding sublibrary

• Helical Interleaver and Helical Deinterleaver blocks in the Convolutional

Interleaving sublibrary

• All blocks in the Digital Baseband Amplitude M odulation sublibrary

• AllblocksintheDigitalBasebandPhase Modulation sublibrary except for

the OQPSK Modulator Baseband and OQPSK Demodulator Baseband blocks

• Interlacer, Deinterlacer, and Derepeat blocks in the Sequence Operations

library

Note that triggered subsystems do not support multirate operation, so any mode of the above blocks that requires multirate operation will not work.

New Gardner Symbol Timing Recovery Demo

Anewdemo,gardner_intdelay, illustrates Gardner symbol timing recovery for a symbol frequency offset.

Version 3.1 (R14SP2) Communications Blockset™ Software

commdigbbndam2

and commdigbbndpm2 Libraries

Updated

Compatibility Considerations

The libraries

commdigbbnda

demodulators parameter.

Improvemen Rayleigh Fa

The Multipa

It now has o

Compatibility Considerations

It now acc time inst

It now on samplethe Sig

Fading

commdigbbndam2 and commdigbbndpm2 have been updated to

and commdigbbndpm3, respectively. The modulators and

in these new libraries do not have the Samples per symbol

ts and Changes to the Multipath

ding Channel Block

th Rayleigh Fading Channel b lock is now two to five times faster.

ptions to output complex path gains and channel filter delay data.

epts arbitrarily small Doppler (but not zero) and inherits sample

ead of setting it.

ly accepts frame-based input, and thus does not support

based input. To work around this, use the frame conversion block of

nal Processing blockset to reformat the signal. Note that the

Channel

block remains the same.

Rician

It now o and wi block wavef

Disc

utputs the same waveform as t he toolbox Rayleigh fading chann el,

ll therefore be a different waveform when compared to the same in the previous version. Note that the statistical characteristics of the orm should be identical to those of the previous version’s block output.

rete-Time VCO Block

Compatibility Considerations

ngesaremadetotheDiscrete-TimeVCOblocksothatthephase

Cha

umulator wraps around and the block does not use a clock. The block

acc

es not allow continuous-time inputs.

Communications Blockset™ Release Notes

Voltage Control Continuous-Tim

led Oscillator Block Renamed to

eVCO

Compatibility Considerations

The Voltage Co the Discrete-

CPM Modulato Baseband Blo

ntrolled Oscillator block was renamed to be consistent with

Time VCO block.

r Baseband and GMSK Modulator

cks

Compatibility Considerations

For the CPM M be a factor cases when

prehistor

met. This depends o

odulator Baseband block, the number of input sym bols must

of the length of the symbol prehistory parameter. This is true for

the input frame has fewer symbols than the length of the Symbol y parameter. The block will now error out if this condition i s not also applies to the GMSK Modulator Baseband block, because it

n the CPM Modulator Baseband block.

Version 3.0.1 (R14SP1) Communications Blockset™ Software

Version 3.0.1 (R14SP1) Communications Blockset Software

This table summarizes what’s new in Version 3.0.1 (R14SP1):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

Fixed Bugs an d Known Problems

Fixed bugs

Related Documentation at Web Site

Source Block Dialog Boxes and the Model Explorer

In this release, the following blocks have been affected by changes in the behavior of source block dialog boxes and the Model Explorer.

• Binary Error Pattern Generator

• Gaussian Noise Generator

• Rayleigh Noise Generator

• Rician Noise Generator

• Uniform Noise Generator

• Bernoulli Binary Generator

• Poisson Integer Generator

• Random Integer Generator

• Barker Code Generator

• Gold Sequence Generator

• Hadamard Code Generator

• Kasami Sequence Generator

• OVSF Code Generator

• PN Sequence Generator

• Walsh Code Generator

Communications Blockset™ Release Notes

Compatibility Considerations

See the section of the Simulink release notes corresponding to R14SP1.

Version 3.0 (R14) Communications Blockset™ Software

Version 3.0 (R14) Communications Blockset Software

This table summarizes what’s new in Version 3.0 (R14):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “Timing Phase Recovery” on page 48

• “Carrier Phase Recovery” on page 48

• “Equalizers” on page 49

• “Filtering and Pulse Shaping” on page 50

• “Trellis-Coded Modulation” on page 51

• “Utility Blocks for Working with Delays” on page 51

• “Enhanced Source Coding Blocks” on page 52

• “AWGN Channel Enhancement for RSim Target” on page 52

• “New Demos” on page 53

• “Changes in BCH Encoder and BCH Decoder” on page 54

• “Changes in Fading Channel Blocks” on page 54

Fixed Bugs an d Known Problems

Fixed bugs

Related Documentation at Web Site

• “Changes in Integrators” on page 54

• “Change in Error Rate Calculation Block” on page 56

• “Version 1.3 Libraries Removed” on page 57

• “Obsolete Blocks” on page 57

• “Blocks Now in Different Library Locations” on page 59

• “Changes in Block Dialog Boxes” on page 61

• “Changes in commstartup Function” on page 62

Communications Blockset™ Release Notes

• “Simulation Settings of Legacy Models” on page 62

Timing Phase Recover y

The blocks in the table below perform timing phase recovery, determining the best instant within a symbol period to sample a signal at the receiver. Sampling at the best instant improves the r eceiver’s performance on a noisy signal. All blocks listed in the table are in the Timing Recovery sublibrary of the Synchronization library.

Block Purpose

Early-Late Gate Timing Recovery

Gardner Timing Recovery

MSK-Type Signal Timing Recovery

Mueller-Muller Timing Recovery Recover the symbol timing phase

Squaring Timing Recovery

For more information and an example, see “Timing Phase Recovery” in the Using the Communications Blockset documentation. For demos, enter

gardner_vfracdelay or msk_sync in the MATLAB Command Window.

Recover the symbol timing phase using the early-late gate method

Recover the symbol timing phase using Gardner’s method

Recover the symbol timing phase using a fourth-order nonlinearity method

using the Mueller-Muller method

Recover the symbol timing phase using a squaring method

Carrier Phase Recovery

The blocks in the table below perform carrier phase recovery. They are in the Carrier Recovery sublibrary of the Synchronization library.

Block Purpose

M-PSK Phase Recovery

CPM Phase Recovery

Recover the carrier phase using the M-Power method

Recover the carrier phase using the 2P-Power method

Version 3.0 (R14) Communications Blockset™ Software

For more information and an example, see “Carrier Phase Recovery” in the Using the Communications Blockset documentation. For a demo, enter

msk_sync in the MATLAB Command Window.

Equalizers

The blocks in the table below enable you to equalize a signal using a linear equalizer, a decision feedback equalizer, or a maximum-likelihood sequence estimation equalizer based on the Viterbi algorithm. All blocks listed in the table are in the Equalizers library.

Block Purpose

CMA Equalizer

LMS Decisio n Feedback Equalizer Equalize using a decision feedback

LMS Linear Equalizer

MLSE Equalizer

Normalized L M S Decision Feedback Equalizer

Normalized LMS Linear Equalizer

RLS Decision Feedback Equalizer Equalize using a decision feedback

RLS Linear Equalizer

Equalize using the constant modulus algorithm

equalizer that updates weights with the LMS algorithm

Equalize using a linear equalizer that updates weights with the LMS algorithm

Equalize using the Viterbi algorithm

Equalize using a decision feedback equalizer that updates weights with the n ormalized LMS algorithm

Equalize using a linear equalizer that updates weights with the normalized LMS algorithm

equalizer that updates weights with the RLS algorithm

Equalize using a linear equalizer that updates weights with the RLS algorithm

Communications Blockset™ Release Notes

Block Purpose

Sign LMS Decision Feedback Equalizer

Sign LMS Linear Equalizer

Variable Step LMS Decision Feedback Equalizer

Variable Step LMS Linear Equalizer

For more information, se e “Equalizers”. For an example, see the new Defense Communications: US MIL-STD-188-110B demo (

Equalize using a decision feedback equalizer that updates weights with the signed LMS algorithm

Equalize using a linear equalizer that updates weights with the signed LMS algorithm

Equalize using a decision feedback equalizer that updates weights with the variable-step-size LMS algorithm

Equalize using a linear equalizer that updates weights with the variable-step-size LMS algorithm

milstd_188110Bmodel).

Filtering and Pulse Shaping

The blocks in the table below perform filtering and pulse shaping. All blocks listed in the table are in the Comm Filters library.

Block Purpose

Gaussian Filter

Ideal Rectangular Pulse Filter

Raised Cosine Receive Filter

Raised Cosine Transmit Filter Upsample and filter the input signal

Filter the input signal, possibly downsampling, using a Gaussian FIR filter

Shape the input signal using ideal rectangular pulses

Filter the input signal, possibly downsampling, using a raised cosine FIR filter

using a raised cosine FIR filter

Version 3.0 (R14) Communications Blockset™ Software

Trellis-Coded M

The blocks in the listed in the tab in the M odulati

Block Purpose

General TCM Decoder

General TCM

M-PSK TCM D

M-PSK TCM Encoder Convolutionally encode binary data

Rectangular QA M TCM Decoder

Rectangular QAM TCM Encoder Convolutionally encode binary

le are in the TCM sublibrary of Digital Baseband Modulation, on library.

Encoder

odulation

table below perform trellis-coded modulation. All blocks

is-coded modulation

using an arbitrary

nally encode binary

using an arbitrary

tion

ecoder

Decode trell data, mapped constellati

Convolutio data and map constella

Decode trellis-coded modulation data, modulated using the PSK method

and modulate using the PSK method

Decode trellis-coded modulation data, modulated using the QAM method

data and modulate using the QAM method

lity Blocks for Working with Delays

Uti

blocks in the table below help yo u compute or manipulate the delay

The

ough one or mo re blocks in your mo de l. This is especially useful when you

thr

e comparing two signals to com pute error rates, or when you need to align

undaries of codewords or other groupings with Simulink frame boundaries.

l blocks listed in the table are in the Utility Blocks library.

Communications Blockset™ Release Notes

Block Purpose

Align Signals Align two signals by find ing the

Find Delay Find the delay between two signals

The reference pages for these blocks include examples of how to use them in a variety of situations.

Enhanced Source Coding Blocks

The new Quantizing Encoder and Quantizing Decoder blocks replace the older Sampled Quantizer Encode and Quantizer Decode b lo cks, which are obsolete. The new blocks perform scalar quantization encoding and decoding operations, respectively. The new blocks can process frame-based column vectors in addition to other kinds of vectors. The new Quantizing Encoder block does not require you to specify the vector length or sample time as parameters in the dialog box.

delay between them

The older encoder produced a third output signal that represented the mean square distortion, while the new Quantizing Encoder block does not. The older encoder produced a discrete-time output signal even if its input was continuous-time, whereas the new Quantizing Encoder block preserves sample times.

AWGN Channel Enhancement for RSim Target

Selected parameters of the AWGN Channel block are now compatible with the Real-Time Wo rkshop rapid simulation (RSim) target. This means that if you use Real-Time Workshop to build an RSim executable, then you can tune selected parameters without recompiling the model. This is useful for Monte Carlo simulations in which you run the simulation multiple times (perhaps on multiple computers) with different amounts of noise. The table b elow indicates, for different modes of the block, which parameters are tunable.

Mode Tunable Parameters

Eb/No

Es/No

Eb/No, Input signal power

Es/No, Input signal power

Version 3.0 (R14) Communications Blockset™ Software

Mode Tunable Parameters

SNR

Variance from mask

SNR, Input signal power

Variance

For more information about the RSim target, see the Real-Time Workshop documentation set.

New Demos

New demos in Release 14 are listed in the table below. You can open the demos by finding them in the Demos pane of the MATLAB Help browser or by entering the corresponding model names in the MATLAB Command Window.

Title Model Name

Convolutional Encoder with Uncoded Bits and Feedback

Soft-Decision GMSK Demodulator

Adjacent and Co-Channel Interference

Adaptive Equalization Using Embedded MATLAB

Gardner Timing Phase R ecovery

MSK Signal Recovery

IEEE 802.11a WLAN Physical Layer

Physical Layer Model of the cdma2000

Standard

Defense Communications: US MIL-STD-188-110B

conv_encoderdemo

gmsk_softdecision

adjcochanint

equalizer_eml

gardner_vfracdelay

msk_sync

wlan80211a

cdma2000_phlayer

milstd_188110Bmodel

Demonstration models hav e also been reorganized into categories to make it easier for you to find relevant demos. You can view the categories using the Demos pane of the MATLAB Help browser.

Communications Blockset™ Release Notes

Changes in BCH En

The BCH Decoder b optional and the this block and t

lock has been changed such that the second output port is

error-correction capability is no longer a parameter. Also,

he BCH Encoder block no longer accept sample-based inputs.

coder and BCH Decoder

Compatibility Considerations

If you built mo

• Resave the mo

• Revise the mo

column vect frame statu the Frame St Blockset. column vec

Changes i

dels w ith earlier versions of these two blocks, then you should

dels using Release 14, to avoid producing Simulink warnings.

dels so that the inputs to the BCH blocks are frame-based ors rather than sample-based vectors. To change the shape or s of a signal, you can use the Reshape block in Simulink, or

atus Conversion (Obsolete) block in the Signal Processing

Because the outputs from the BCH blocks are now frame-based

tors, you might need to revise other parts of your model as well.

n Fading C hannel Blocks

Compatibility Considerations

The Mult are desi vectors vector if the i

ipath Rayleigh Fading Channel and Rician Fading Channel blocks

gned to process only sample-based scalars or frame-based column

. In Release 13, the blocks mistakenly accepted sample-based column

s as input. In Release 14, the blocks correctly produce an error message

nput signal is a sample-based vector or a matrix.

Chang

The ne bloc

es in Integrators

w Communications Filters library contains a new Integrate and Dump

k and a new Windowed Integrato r block.

Compatibility Considerations

e blocks behave differently compared totherespectiveblocksofthesame

Thes

es in Release 13.

nam

new Integrate and Dump block

The

Version 3.0 (R14) Communications Blockset™ Software

• Does not reduce the sum modulo a constant. The Absolute value bound

parameter is not part of the new block.

• Doesnotrequireyoutoenterthesampletimeinthedialogbox. The

Sample time parameter is not part of the new block.

• Measures the Integration period parameter value in samples, not

seconds.

• Can process sample-based scalars and frame-based matrices, but not

sample-based vectors of length greater than 1. In a frame-based matrix, a given column is interpreted as a set of samples from a single channel.

• Can optionally discard a specified number of input samples at the beginning

of the simulation. In frame-based mode, the number of samples to discard can be different for each channel(column)oftheinputmatrix.

• Can optionally suppress the intermediate cumulative sums and output

only the final sum.

The new Windowed Integrator block

• Does not require you to enter the sample time or vector size in the dialog

box. The Sample time and Input vector size parameters are not part of the new block.

• Measures the integration period in samples, not seconds.

• Can process sample-based scalars and frame-based matrices, but not

sample-based vectors of length greater than 1. In a frame-based matrix, a given column is interpreted as a set of samples from a single channel.

• Processes only discrete-tim e signals, not continuous-time signals.

• Uses cumulative sums as integrals and does not offer a choice of integration

methods. The Integration m ethod parameter is not part of the new block.

To learn more about the new blocks, see the Integrate and Dump and Windowed Integrator online reference pages, respectively.

Communications Blockset™ Release Notes

Legacy Models Containing Integrator Blocks. If you built models with the older Integrate and Dump block or the older Windowed Integrator block, then the block is unchanged there. You can update the block manually by replacing it with the newer block from the CommunicationsFilterslibrary. You might need to change parameters or other parts of your model to make the new block fit into your model.

To find the older blocks in their default library setting, type

comminteg2

in the MATLAB Command Window.

Note The o lder Integrate and Dump block and the older Windowed Integ rator blocks are obsolete and might b e removed from a future release of the Communications Blockset.

Change in Error Rate Calculation Block

Compatibility Considerations

If you set Output data to Workspace in the Error Rate Calculation block, then the variable containing the output data resides in the base MATLAB workspace. In previous releases, the variable resided in the calling workspace.

This change is relevant if you invoke the simulation from a function . If you need to access the output data within the function, use in a function, the command below accesses a variable called base MATLAB workspace and assigns its value to a variable by the same name in the function workspace.

ErrorVec = evalin('base','ErrorVec;');

evalin. For example,

ErrorVec in the

If you invoke the simulation directly from the model window or by entering a

sim command in the MATLAB Command Window, then the change in

behavior o f the Error Rate Calculation block does not affect you.

Version 3.0 (R14) Communications Blockset™ Software

Version 1.3 Libr

aries Removed

Compatibility Considerations

The block libra

10)arenolong Communicatio a future relea

Obsolete Blo

ries from the Communications Toolbox Version 1.3 (Release

er installed as p art of Release 14. T he block libraries from the

ns Toolbox Version 1.5 (Release 11) might be rem ov ed from

se.

cks

Compatibility Considerations

The table be In particu analog bas are obsole counterp counterp

Note For still pr directo recomm

low lists blocks from Release 13 that are obsolete as of Release 14.

lar, all digital passband modulation, digital p assband demodulation,

eband modulation, and analog baseband demodulation blocks

te. In place of digital passband blocks, use their digital baseband arts. In place of analog baseband blocks, use their analog passband arts.

backward compatibility, the obsolete blocks in the table below are

ovided in Release 14 in the

ry tree. However, they might be removed in a future release and it is

ended that you avoid using these obsolete blocks in your m odels.

matlabroot/commblks/commblksobsolete

Where funct setti There usin

applicable, the second column lists blocks that provide similar

ionality. In some cases, the similar block requires different parameter

ngs, data formats, or signal attributes compared to the original block.

fore, you should read the docum entationforthesimilarblockbefore

g it in your model.

Communications Blockset™ Release Notes

Obsolete Block Similar Block(s), if Any

Continuous-Time Eye and Scatter Diagrams

Discrete-Time Eye Diagram Scope, Discrete-Time Scatter Plot Scope, Discrete-Time Signal Trajectory Scope

CPFSK Demodulator Passband CPFSK Demodulator Baseband

CPFSK Modulator Passband CPFSK Modulator Baseband

CPM Demodulator Passband CPM Demodulator Baseband

CPM Modulator Passband CPM Modulator Baseband

Discrete Modulo Integrator

DPCM Decoder

DPCM Encoder

DSB A M Demodulator Baseband DSB A M Demodulator Passband

DSB AM Modulator Baseband DSB AM Modulator Passband

DSBSC AM Demodulator Baseband DSBSC AM Demodulator Passband

DSBSC A M Modulator Baseband DSBSC AM Modulator Passband

Enabled Quantizer Encode Quantizing Encoder

FM Demodulator Baseban d FM Demodulator Passba n d

FM Modulator Baseband FM Modulator Passband

General Q AM De modulator Passband

General Q AM De modulator Baseband

General QAM Modulator Passband General QAM Modulator Baseband

GMSK Demodulator Passband GMSK D em odulator Baseband

GMSK Modulator Passband GMSK Modulator Baseband

M-DPSK Demodulator Passband M-DPSK Demodulator Baseband

M-DPSK M odulator Passband M-DPSK Modulator Baseband

M-FSK Demodulator Passband M-FSK Demodulator Baseband

M-FSK Modulator Passband M-FSK Modulator Baseband

Version 3.0 (R14) Communications Blockset™ Software

Obsolete Block Similar Block(s), if Any

Modulo Integrator

M-PAM Demodulator Passband M-PAM Demodulator Baseband

M-PAM Modulator Passband M-PAM Modulator Baseband

M-PSK Demodulator Passband M-PSK Demodulator Baseband

M-PSK Modulator Passband M-PSK Modulator Baseband

MSK D emodulator Passband MSK Demodulator Baseband

MSK Modulator Passban d MSK Modulator Baseband

OQPSK Demodulator Passband OQPSK Demodulator Baseband

OQPSK Modulator Passband OQPSK Modulator Baseband

PM Demodulator Baseban d PM Demodulator Passba n d

PM Modulator Baseband PM Modulator Passband

Quantizer D ecode Quantizing Decoder

Rectangular QAM Demodulator Passband

Rectangular QAM Modulator Passband

Sampled Quantizer Encode Quantizing Encoder

SSB AM Demodulator Baseband SSB AM Demodulator Passband

SSB AM Modulator Baseband SSB AM Modulator Passband

TriggeredReadFromFile

Triggered Write to File

Rectangular QAM Demodulator Baseband

Rectangular QAM Modulator Baseband

From File (Simulink)

To File (Simulink)

Blocks Now in Different Library Locations

Compatibility Considerations

The table be low lists blocks that reside in different libraries in Release 14, compared to Release 13. If you used these blocks in models that you saved in Release 13, then the blocks will still work in Release 14. However, you should

Communications Blockset™ Release Notes

be aware of the changed locations in case you look for these blocks in Release 14 in the library windows or the Simulink Library Browser.

Block Release 13 Location Release 14 Location

Baseband PLL

Synchronization Components sublibrary

of Sy nchro nization

Binary Error Pattern Generator

Data Sources sublibrary of Comm Sources

Noise Generators sublibrary of Comm Sources

Charge Pump PLL Synchronization Components sublibrary

of Sy nchro nization

Complex Phase Difference

Sequence Operations sublibrary of Basic

Utility Blocks

Comm Functions

Complex Phase Shift Sequence Operations

Utility Blocks sublibrary of Basic Comm Functions

Discrete-Time VCO Controlled Sources

sublibrary of Comm

Components sublibrary

of Sy nchro nization Sources

Integrate and Dump Integrators sublibrary

of Basic Comm

Communications

Filters Functions

Linearized Baseband PLL

Synchronization Components sublibrary

of Sy nchro nization

Phase-Locked Loop

Voltage-Controlled Oscillator

Synchronization Components sublibrary

Controlled Sources sublibrary of Comm Sources

Windowed Integrator Integrators sublibrary

of Basic Comm Functions

of Sy nchro nization

Components sublibrary

of Sy nchro nization

Communications

Filters

Version 3.0 (R14) Communications Blockset™ Software

Utility Functions Library Renamed. The Utility F u nctions library is now called Utility Blocks.

Contents of Basic C omm Function Library Moved. The Basic Comm Functions library, which consisted of the Integrators sublibrary and the Sequence Operations sublibrary, is no longer in the Communications Blockset. Sequence Operations has become a top-level library. The Integrate and Dump block and the Windowed Integrator block, formerly in the Integrators sublibrary, are now in the Communications Filters library. The Discrete Modulo Integrator and Modulo Integrator blocks are now obsolete.

Changes in Block Dialog Boxes

A few blocks have renamed some of their parameters or made other dialog box changes.

Compatibility Considerations

Legacy models might issue warnings when you first open them with Release

14. After you resave the models with Release 14, the warnings will not recur. Specific changes are listed below.

Release 13

Block

BCH Decoder Show number of

Binary-Output RS Decoder

Discrete-Time Eye Diagram Scope

Discrete-Time Scatter Plot Scope

Discrete-Time Signal Trajectory Scope

Characteristic

errors check box

Output port for number of corrected errors check box

Dialog box uses check boxes to show or hide groups of parameters

Change in Release

Output number of

corrected errors

check box

Output number of

corrected errors

check box

Dialog box uses tabbed

panels to organize

parameters

Communications Blockset™ Release Notes

Block

Discrete-Time VCO

Voltage-Controlled Oscillator

Release 13 Characteristic

Oscillation frequency parameter

Change in Release

Renamed as Quiescent

frequency parameter

Changes in comm startup Function

The commstartup function, which changes the default Simulink model settings to values more appropriate for the simulation of communication systems, has changed some of its settings.

Compatibility Considerations

When you run commstartup,it

• Changes the default solver to a discrete solver.

• Changes the default value of a Simulink diagnostic setting so that Simulink

does not issue a warning when a source block uses an i nhe rited sample time. Some Communications Blockset blocks internally inherit sample times, which can be a useful and valid modeling technique.

Simulation Settings of Legacy Models

Compatibility Considerations

Your legacy models might issue warnings if they use settings other than the ones listed in “Changes in commstartup Function” on page 62 above. You can suppress the warnings by changing certain settings and resaving the model.

Discrete Solver. If you have legacy models that issue a warning like

Warning: The model 'untitled' does n ot have continuous states, hence using the solver 'Va ria bleStepDiscrete' instead of the solver 'ode45' specified i n the Configuration Parameters dialog.

whenyoustartthesimulationinR14,thenconsiderchangingthesolver to a discrete solver and resaving the model. To change the solver, use the

Version 3.0 (R14) Communications Blockset™ Software

Configuration Parameters option on the m odel window’s Simulation menu.

Sample Time of Source Blocks. Some Communications Blockset blocks internally inherit sample times, which can be a useful and valid modeling technique. If you have legacy m odels that issue a warning like

Warning: Source 'untitled/DSP Constant' specifies that its sample time (-1) should be back-i nhe rited. You shoul d explicitly specify the sample time of sources .

when you start the simulation in R14, then consider changing the diagnostic setting manually and resaving the model. To change the setting manually, choose the Configuration Parameters option on the model window’s

Simulation menu, expand Diagnostics in the left pane, select Sample Time in the left pane, and then set Source block specifies -1 sample time

none in the right pane.

Communications Blockset™ Release Notes

Version 2.5 (R13) Communications Blockset Software Release Notes

This table summarizes what’s new in Version 2.5 (R13):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

• “RF Impairments Library” on page 64

• “Sequence Generators Library” on page 65

• “Eye Diagram, ScatterPlot, and Signal Trajectory Scopes” on page 66

• “CRC Library” on page 67

• “Enhancements to Reed-Solomon Blocks” on page 67

• “New Demos” on page 68

• “Enhancements to CPM Mod u la tor Block” on page 68

• “Fixed Bugs” on page 69

• “Known Problems” on page 70

• “Old Models Using the Baseband or Passband SSB Modulators Must Be

Resaved” on page 71

Fixed Bugs an d Known Problems

Fixed bugs and known problems

Related Documentation at Web Site

• “Change the Boolean Logic Signals Parameter to Off” on page 71

RF Impairments Library

The new RF Impairments library contains blocks to simulate radio frequency (RF) impairments at the receiver. The blocks in the library are listed in the following table.

Version 2.5 (R 13) Communications Blockset™ Software Release Notes

Block Name Purpose

Free Space Path Loss Reduce the amplitude of the input

signal by the a mount specified

I/Q Imbalance Create a complex baseband model of

the signal impairments caused by imbalances between in-phase and quadrature receiv er components

Memoryless Nonlinearity

Phase/Frequency Offset Apply residual phase and frequency

Phase Noise

Receiver Thermal Noise

Apply a memoryless nonlinearity to a complex baseband signal

offsets to a complex baseband signal

Applyreceiverphasenoisetoa complex baseband signal

Apply receiver thermal noise to a complex baseband signal

Sequence Generators Library

The Comm Sources library is now divided into four sublibraries for Version

2.5. Three of these sublibraries contain the blocks from the Version 2.0.1 Comm Sources library:

• Data Sources

• Noise Sources

• Controlled Sources

The fourth, the Sequence Generators sublibrary, contains the PN Sequence Generator block and five new blocks for Version 2.5. You can use the blocks in the Sequence Generators sublibrary to generate sequences for spreading orsynchronizationinacommunicationsystem. Thefollowingtableliststhe blocks in the Sequence Generators sublibrary.

Communications Blockset™ Release Notes

Block Name Purpose

Barker Code Generator Generate a Barker Code

Gold Sequence Generator Generate a Gold sequence from a set

Kasami Se quence Generator Generate a Kasami sequence from

Hadamard Code Generator Generate a Hadamard code from an

OVSF Code Generator Generate an orthogonal variable

PN Sequence Generator Generate a pseudonoise seque nce

Walsh Code Generator Generate a Walsh code from an

of sequences

the set of Kasami sequences

orthogonal set of codes

spreading factor (OVSF) code from a set of orthogonal codes

orthogonal set of codes

Eye Diagram, ScatterPlot, and Signal Trajectory Scopes

The Version 2.0.1 Discrete-Time Eye and Scatter Diagram block, in the Comm Sinks library, has been replaced by three new blocks for Version 2.5, as described in the following table.

Block Name

Discrete-Time Eye Diagram Scope Display multiple traces of a

Discrete-Time Scatter Plot Scope

Discrete-Time Signal Trajectory Scope

Purpose

modulated signal

Display a modulated signal in its signal space by plotting its in-phase component against its quadrature component

Display a modulated signal in its signal space by plotting its in-phase component versus its quadrature component

Version 2.5 (R 13) Communications Blockset™ Software Release Notes

TheseblocksgreatlyenhancethefeaturesoftheDiscrete-TimeEyeand Scatter Diagram.

CRC Library

The Channel Coding library has been renamed the Error Correction and Detection library, and a new sublibrary, CRC, has been added to the Error Detection and Correction library. The CRC library contains new blocks for appending cyclic redundancy check (CRC) bits to data and for detecting errors in transmission.

The following table lists the blocks in the CRC library.

Block Name Purpose

CRC-N Generator Generate CR C bits according to the

selected CRC method and append them to input data

CRC-N Syndrome Detector

General CRC Generator Generate CRC bits according to the

General CRC Syndrome Detector

Detect errors in the input data according to the specified CRC method

generator polynomial and append them to input data

Detect errors in the input data according to the generator polynomial

Enhancements to Reed-Solomon Blocks

The following four blocks, in the Block sublibrary of the Error Detection and Correction Library, have new features:

• Binary-Input RS Endoder

• Binary-Input RS Decoder

• Integer-Input RS Encoder

• Integer-Input RS Decoder

Communications Blockset™ Release Notes

You can now specify the primitive polynomial and generator polynomial, which are used to generate the codes. This enables you to use a much wider range of R eed-So lomon codes. There is a lso a new option to output the number of corrected errors from the Binary-Input RS Decoder and Integer-Input RS Decoder blocks.

New Demos

The Communications Blockset contains eleven new demos for Version 2.5. These include a large-scale demo model o f a com m ercial application of a third generation (3G) wireless system using wide-band code division multiple access (WCDMA). The demo presents an end-to-end transmission between a base station and a mobile station, as specified by the Third Generation Partnership Project (3G PP).

The new demos are as follows:

• WCDMA End-to-End Physical Layer Demo

• WCDMA Coding and Multiplexing Demo

• WCDMA Spreading and Modulation Demo

• RF Satellite Link Demo

• HiperLAN/2 Demo

• Bluetooth Voice Transmission Demo

• Adaptive Equalization Demo

• CPM Phase Tree Demo

• GMSK vs. MSK Demo

• Filtered QPSK vs. MSK Demo

• Raleigh Fading Channel Demo

Enhancements to CPM Modulator Block

TheCPMmodulatorblocknowenablesyoutospecifyboththeentirepulse length and the pulse main lobe length when simulating an LSRC frequency pulse length. This feature enables you to simulate a modulation such as 3SRC6.

Version 2.5 (R 13) Communications Blockset™ Software Release Notes

Fixed Bugs

Fading channels

The accuracy of Blocks has bee sampling rate standards suc

List of demos for which code can now be generated using Real Time Workshop

The following demos now generate code using Real Time Workshop:

•

dmt_sim

• dvbt_sim

• tstgraycod

• phasenoise_sim

Doppler spread of the Rayleigh and Rician Fading Channel

n improved. The blocks now give better results for high s and small Doppler frequencies, as specified in communication hasWCDMA.

• dmt_alt_sim

• tstconvcod

Passband FSK and CPM modulators and demodulators are more ac

The passband FSK and CPM modulators have been modified to generate more accurate waveforms by per fo rm ing FIR interpolation when upsampling. The FIR filters significa ntly reduce the levels of any spectral copies revealed by upsampling. They also introduce delay into the modulators.

Reed

The Reed-Solomon blocks now encode and decode signals correctly.

curate

-Solomon blocks now encode and decode correctly

Communications Blockset™ Release Notes

Known Problems

SeveralCommunicationsBlocksetblocksareincompatible with Real-Time Workshop

Several Communications Blockset blocks are incompatible with Real-Time Workshop. As a result, Real-Time Workshop cannot generate code for models that include these blocks:

• Continuous-Time Eye and Scatter Diagrams

• TriggeredReadfromFile

• Triggered Write to File

• Integer-Input RS Encoder

• Integer-Output RS Decoder

• Binary-Input RS Encoder

• Binary-Output RS Decoder

• Blocks in the CPM sublibrary of the Digital Baseband sublibrary of the

Modulation library

Several Communications Blockset demos are incompatible with Re

Several Communications Blockset demos are incompatible with Real-Time Workshop. As a result, Real-Time Workshop cannot generate code f or these demos:

• 256 Channel ADSL

• Adaptive Equalization

• Bluetooth Voice Transmission

• CPM Phase Tree Example

• Digital Video Broadcasting Model

• Discrete Multitone Signaling

• Filtered QPSK vs. MSK

al-Time Workshop

Version 2.5 (R 13) Communications Blockset™ Software Release Notes

• GMSK vs. MSK

• WCDMA Coding and Multiplexing Example

• WCDMA End-to-End Physical Layer

• WCDMA Spreading and Modulation Example

Old Models Using the Baseband or Passband SSB Modulators Must Be Resaved

Compatibility Considerations

The baseband and passband SSB modulators have been updated for Release 13 to include a pop-up menu enabling you to choose between upper and lower sideband modulation. You should resave any models using the old SSB modulators before running them in Release 13, to avoid producing Simulink warnings.

Change the Boolean Logic Signals Parameter to Off

The Communications Blockset does not support signals with boolean data type.

Compatibility Considerations

In Release 13, the Simulink Boolean logic signals parameter is now set to

On by default. If you use Simulink blocks such as the Logical Operator

block together with Communications Blockset blocks in a model, you must change the default setting of the Boolean logic signals parameter setting to

Off. Todoso,enter

commstartup

at the beginning of each MATLAB session, b efo re you create a model. This sets the Boolean logic signals parameter to during the current MATLAB session.

To manually change the Boolean logic signals parameter in a model to

Off, do the following steps:

Off for every model you create

Communications Blockset™ Release Notes

1 Select Simulation param eters from the model window’s Simulation

menu.

2 Click the Advanced tab in the Simulation Parameters dialog box.

3 Select Boolean logic signals in the Optimizations field.

4 Under Action, select the Off check box.

5 Click OK.

Note that this changes the Boolean logic signals parameter to

Off only

for the current model.

Because the default setting of the Boolean logic signals parameter prior to Release 13 was

Off, it is not necessary to make changes to models that you

created prior to Release 13.

Version 2.0.1 (R12.1) Communications Blockset™ Software Release Notes

Version 2.0.1 (R12.1) Communications Blockset Software Release Notes

This table summarizes what’s new in Version 2.0.1 (R12.1):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

Fixed Bugs an d Known Problems

Fixed bugs

Related Documentation at Web Site

Setting Simulink Preferences Automatically

The new commstartup.m script sets certain Simulink preferences to values that are most appropriate for the simulation of communication systems. To use this script, type the command in the MATLAB Command Window.

commstartup in your startup.m file or

Converting Between Bipolar and Unipolar Signals

The Utility Functions library contains new blocks that convert between bipolar and unipolar signals. The blocks are Bipolar to Unipolar Converter and Unipolar to Bipolar Converter.

Choosing Seeds for Random-Output Blocks

The randseed function is a new function that generates prime numbers for use as Initial seed parameters in blocks that produce random output. Compared to composite s eeds, prime seeds yield output that h as better statistical properties.

Using Error Counts to Control Simulation Duration

You can now configure the Error Rate Calculation block so that it automatically stops the simulation upon detecting a specified number

Communications Blockset™ Release Notes

of errors. You do not need to know in advance how long it will take to accumulate that many errors.

Choosing the Algorithm for Integrator Blocks

TheDiscreteModuloIntegratorblocknowallowsyoutochoosetheintegration method using a mask parameter. The corresponding mask parameter in the Windowed Integrator block has changed its name from Method to Integration method for consistency with other integration blocks.

Fixed Bugs

• The M-FSK Baseband Modulator, M-FSK Baseband Demodulator, M-FSK

Passband Modulator, an d M-FSK Passband Demodulator blocks now use the correct tone spacing.

• The PN Sequence Generator block now generates only bin ary values, and

thenumbersinthesequencedonotdependontheframestatusorsize.

Binary Symmetric Channel Block

Compatibility Considerations

The Binary Symmetric Channel block dialog box n ow omits the Input vector length and Sample time parameters because the block now determines

these quantities automatically. However, if you open a model in Release

12.1 that contains the Release 12.0 Binary Symmetric Channel block, then the Command Window might display warnings about block parameters. To suppress these warnings in the future, simply save the model from Release

12.1.

Digital Passband Modulation Blocks

Compatibility Considerations

Any model that includes a digital passband modulator block or a digital passband demodulator block must use a variable-step solver rather than a fixed-step solver. To configure a model so that it uses a variable-step solver,

Version 2.0.1 (R12.1) Communications Blockset™ Software Release Notes

select Simulation parameters from the model window’s Simulation menu and then set the Type parameter on the Solver panel to

Variable-step.

Communications Blockset™ Release Notes

Version 2.0 (R12) Communications Blockset Software Release Notes

This table summarizes what’s new in Version 2.0 (R12):

New Features and Changes

Yes Details below

Version Compatibility Considerations

Yes Summary

New features and changes introduced in this version are

Fixed Bugs an d Known Problems

Fixed bugs and known problems

Related Documentation at Web Site

Digital Modulation Libraries

The digital modulation libraries have been replaced with new ones. The new libraries contain baseband and passband sublibraries for

• Amplitude modulation (PAM, QAM)

• Phase modulation (PSK, DPSK)

• Frequency modulation (FSK)

• Continuous phase modulation (CPM), including MSK and GMSK

Interleaving Libraries

A new Interleaving library contains sublibraries for block interleaving and convolutional interleaving. These sublibraries support general block interleavers and general multiplexed interleavers, as well as several special cases of these.

Fading Channels

The new Multipath Rayleigh Fading Channel and Rician Fading Channel blocks implement baseband simulations of fading propagation channels. These blocks model real-world mobile communication effects and are useful for modeling mobile wireless communication systems.

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Enhanced Suppor t for Convolutional Coding

The new APP Decoder block implements a posteriori probability decoding. The enhanced Convolutional Encoder and Viterbi Decoder blocks now support a more general class of convolutional codes by accepting a trellis parameter in their dialog boxes. T he new Toolbox supports this enhancement, by converting a polynomial description of an encoder into a corresponding trellis description.

poly2trellis function in the Communications

Sequence Operations

These new blocks in the Sequence Operations library manipulate data sequences in various ways:

• Bit to Integer Co nverter and Integer to Bit Converter convert between

integers and their binary representations.

• Complex Phase Shift and Complex Phase Difference manipulate or analyze

the phase of a complex signal.

• Derepeat is an inverse o f the Sig n al Processing Blockset’s Repeat block.

• Interlacer and Deinterlacer can be useful for combining or separating

in-phase and quadrature components of a signal.

• Puncture and Insert Zero are useful for processing punctured codes.

Fixed Bugs

Some blocks do not support Real-Time Workshop code generation

You can now generate code with all blocks using Real-Time Workshop, except:

• Eye and scatter diagrams

• Continuous-time voltage-controlled oscillator

• Passband modulators and demodulators

• CPM modulators and demodulators

• Multipath Rayleigh Fading Channel

• Rician Fading Channel

Communications Blockset™ Release Notes

Some blocks are not compatible with the Simulink Accelerator

All blocks, except the analog passband modulators a nd demodulators, are now compatible with the Simulink Accelerator.

The digital modulators produce continuous-time outputs and process datain continuous time

All of the digital modulators and demodulators have been rewritten and they now process data in discrete time and produce discrete-time outputs.

The M-FSK demodulators use incorrect correlation

TheM-FSKdemodulatorsnowdoacomplex correlation of the input.

The complex Rayleigh fading channels have incorrect characteristics

The n ois e produced by the Rayleig h fading channels did not match with what is specified in the mask dialog. The two complex Rayleigh fading channels have now been replaced by the Multipath Rayleigh Fading Channel, which models real-world mobile commu nications effects.

Probabilities of ones in output from the Binary Vector Noise Generatorare incorrect

The probabilities of ones in the output of the Binary Vector Noise Generator now match what is specified in the mask.

Gaussian Noise Generator uses wrong sample time

The Gaussian Noise Generator now uses the correct sample time as what is specified in the mask.

PN Sequence Generator repeats its output

The PN Sequence Generator has been rewritten and now gives the correct results.

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Eye and scatter plot blocks produce an error if you close the figure windowand run the simulation again

You can now run the simulation again after you close the figure window.

Scrambler and Descrambler give incorrect results for non-base-2 calculations

Scrambler and Descrambler now perform properly for any integer calculation base greater than 1.

Scrambler and Descrambler ignore all elements other than the first in acalculation base vector

Scrambler and Descrambler now accept only a scalar calculation base.

Scrambler and Descrambler negate the results when the initial states containnegative numbers

Scrambler and Descrambler now accept only nonnegative numbers as initial states.

The AWGN Channel produces all-zero outputs when given continuous-time inputsin both of the Signal to noise ratio (Es/No and SNR) modes

The A WGN Channel now does not accept continuous-time input for both of theSignaltonoiseratio(Es/NoandSNR)modes.

Segmentation violation when blocks are given invalid or empty parameters

All blocks now produce an error when given invalid or empty parameters.

Known Problems

Code Generation Limitations

Several blocks are incompatible with Real-Time Workshop. As a result, Real-Time Workshop cannot generate code for models that include these blocks:

Communications Blockset™ Release Notes

• Discrete-Time Eye and Scatter Diagrams block

• Continuous-Time Eye and Scatter Diagrams block

• Voltage-Controlled Oscillator block

• Multipath Rayleigh Fading Channel block

• Rician Fading Channel block

• Blocks in the Analog Passband and Digital Passband sublibraries of the

Modulation library

• Blocks in the CPM sublibrary of the Digital Baseband sublibrary of the

Modulation library

Furthermore, blocks in the Analog Passband sublibrary of the Modulation library are not compatible with the Simulink Accelerator.

Limited Frame and Matrix Support

The Communications Blockset provides limited support for matrix and frame-based signals. In a future release, more blocks will support multichannel behavior, and more blocks will be optimized for faster frame-based processing. Release 12 strivestobeforward-compatibleinthe sense that future signal support modes should not invalidate current modes and s hould minimize the difficulty of upgrading from Release 12 to a future release.

As a consequence of this forward-looking view, some blocks now use strict guidelines to determine the kinds of signals that they accept. One consideration is that if a block will ultimately support frame-based multichannel signals, then a sample-based vector input might potentially represent either a frame of data from a single channel or a set of samples from multiple channels. Therefore, even if such a block does not currently provide such comprehensive signal support, it accepts only frame-based vectors, whose interpretation is unambiguous.

New Block Libraries

The Communications Blockset uses a new set of block libraries, although it also includes the previous set of block libraries for backward compatibility.

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Compatibility Considerations

The new set of libraries is what appears in the Simulink Library Browser and what opens if you enter build new models using this new set.

Your previous models link to the previous set of libraries unless you choose to replace individual blocks manually. You can access the previous set of libraries by entering

commlib 1.5 at the MATLAB prompt.

Reorganization of Utility Functions in New Set of Libraries. The Utility Functions library has been reorganized. The table below lists blocks in Release12thatwereintheRelease11UtilityFunctionslibrary.

Block New Location

commlib at the MATLAB prompt. You should

Data Mapper

Derepeat

Descrambler

Utility Functions

Sequence Operations sublibrary

Differential Decoder Source Coding

Differential Encoder Source Coding

Discrete Modulo Integrator

Integrators sublibrary (formerly called Discrete Time Modulo Integrator)

Discrete-Time VCO Comm Sources

Windowed Integrator Integrators sublibrary

Modulo Integrator Integrators sublibrary

Integrate and Dump (formerly called

Integrators sublibrary Scheduled Reset Integrator)

Scrambler Sequence Operations sublibrary

Voltage-Controlled Oscillator Comm Sources

The Sequence Operations and Integrators sublibraries are in the Basic Comm Functions library.

Communications Blockset™ Release Notes

New Signal Suppo

As of Release 12, one-dimensiona signals.

Simulink supports matrix signals in addition to

l arrays, and frame-based signals in addition to sample-based

Compatibility Considerations

The Communica frame-based

Because a fut and frame su by using str accept. As a 12, then yo 12 (such as sample-ba

As anothe blocks no

of channe

blocks i

Functi

longer have the Frame-based inputs check box and the Number

nherit the frame status and number of channels from their inputs.

onality Changes in Specific Blocks

tions Blockset processes certain kinds of matrix and

signals.

ure release is planned to include more comprehensive matrix

pport, som e Release 12 blocks avoid conflict with future features

ict guidelines to determine the kinds of signals that they now

consequence, if you used vector signals in a model before Release

u might need to use a particular kind of vector signal in Release

a frame-based column vector, a frame-based row vector, or a

sed vector of a particular shape or dimension).

r consequence of frame support, the AWGN Channel and Derepeat

ls parameter as in the Communications Toolbox 1.5. Instead, these

Compatibility Considerations

• The Continuous-Time Eye and Scatter Diagrams and Discrete-Time Eye

and Scatter Diagrams blocks process complex signals, whereas their counterparts before Release 12 (called Eye-Diagram Scatter Plot and Sample-Time Eye-Diagram Scatter) processed real vectors that listed in-phase and quadrature components separately.

• The blocks for Reed-Solomon and BCH coding no longer have a second

input port for an enabler signal. The change affects the Binary-Input RS Encoder, Binary-Output RS Decoder, Integer-Input RS Encoder, Integer-Output RS Decoder, and BCH Decoder blocks.

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

• The Scrambler, Descrambler, and PN Sequence Generator blocks no longer

have a trigger input. The Scrambler and Descrambler blocks no longer have a state output. The PN Sequence Generator block produces output from the last register in the generator, not the first.

• The Convolutional Encoder and Viterbi Decoder blocks have new interfaces

because they can now accept a more general trellis description of a convolutional encoder.

• The Version 1.4 Error Rate Calculation block considers a vector input to

be a sample, whereas the current block considers a vector input to be a frame of multiple samples. For vector inputs of length parameter value of delay of

• The Voltage-Controlled Oscillator block now uses the cosine, not sine,

function to produce its waveform. This change affects the phase of the output signal.

• The blocks in the Synchronization library no longer use a Gain at the

output parameter. The remaining parameters that define characteristics

of the voltage-controlled oscillator have changed slightly. Also, the Baseband PLL and Linearized Baseband PLL blocks now include three output ports instead of one, to match the Phase-Locked Loop and Charge Pump PLL blocks.

k*n in the current block.

k in the Version 1.4 block is equivalent to a Receive

n,aReceive delay

Block Name Changes

Compatibility Considerations

The table below lists the old and new names of blocks that were part of the Communications Toolbox before Release 12 and that have changed their names. The old names are from the last printed version of the Communications Toolbox User’s Guide. Because the libraries have been reorganized since that document was printed, the third column of the table lists the current library name for each block.

Communications Blockset™ Release Notes

Names of Blocks in Version 1.x and Version 2, Where Different

Old Block Name (Version 1.x)

New Block Name (Version 2)

ADM with Carrier DSB AM Demodulato r

Passband

ADM with Carrier CE DSB AM Demodulator

Baseband

AM with Carrier DSB AM Modulator

Passband

AM with Carrier CE DSB AM Modulator

Baseband

BCH Decode Vector

BCH Decoder Block Codes

In/Out

BCH Encode Vector

BCH Encoder Block Codes

In/Out

Baseband Model PLL Baseband PLL

Bernoulli Random Binary Noise Generator

Bernoulli Binary Generator

Binary Error Channel Binary Symmetric

Channel

Cyclic Decode Vector

Binary Cyclic Decoder Block Codes

In/Out

Library Location

Analog Passband

Analog Baseband

Analog Passband

Analog Baseband

Synchronization

Comm Sources

Channels

Cyclic Encode Vector

Binary Cyclic Encoder Block Codes

In/Out

DPCM Decode DPCM D ecoder Source Coding

DPCM Encode DPCM Encoder Source Coding

DSB-SC ADM DSBSC AM

Analog Passband

Demodulator Passband

DSB ADM CE DSBSC AM

Analog Baseband

Demodulator Baseband

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Names of Blocks in Version 1.x and Version 2, Where Different (Continued)

Old Block Name (Version 1.x)

DSB-SC AM DSBSC AM Modulator

New Block Name (Version 2)

Library Location

Analog Passband

Passband

DSB AM CE DSBSC AM Modulator

Analog Baseband

Baseband

Discrete Time VCO Discrete-Time VCO Comm Sources

Discrete Time Modulo Integrator

Eye-Pattern & Scatter Plot

FDM

Discrete Modulo Integrator

Continuous-Time Eye and Scatter Diagrams

FM Demodulator

Integrators

Comm Sinks

Analog Passband

Passband

FDM CE

FM Demodulator

Analog Baseband

Baseband

FM Modulator

Analog Passband

Passband

FM CE

FM Modulator

Analog Baseband

Baseband

Gaussian Random Noise Generator

Gaussian Noise Generator

Comm Sources

Hamming Decode Vector In/Out

Hamming Encode Vector In/Out

Linear Block Decode Vector In/Out

Linear Block Encode Vector In/Out

Hamming Decoder

Hamming Encoder

Binary Linear Decoder

Binary Linear Encoder

Block Codes

Communications Blockset™ Release Notes

Names of Blocks in Version 1.x and Version 2, Where Different (Continued)

Old Block Name (Version 1.x)

Linearized Baseband Model PLL

New Block Name (Version 2)

Linearized Baseband PLL

Library Location

Synchronization

µ-Law Compressor Mu-Law Compressor Source Coding

µ-Law Expander Mu-Law Expander

PDM

PM Demodulator

Source Coding

Analog Passband

Passband

PDM CE

PM Demodulator

Analog Baseband

Baseband

PLL

Phase-Locked Loop

PM Modulator

Synchronization

Analog Passband

Passband

PM CE

PM Modulator

Analog Baseband

Baseband

Poisson Random Integer Generator

Poisson Integer Generator

Comm Sources

Quantization Decode Quantizer Decode Source Coding

Reed-Solomon Decode Binary Vector In/Out

Binary-Output RS Decoder

Block Codes

Reed-Solomon Decode Integer Vector In/Out

Reed-Solomon Encode Binary Vector In/Out

Reed-Solomon Encode Integer Vector In/Out

Rician Random Noise Generator

Integer-Output RS

Block Codes

Decoder

Binary-Input RS

Block Codes

Encoder

Integer-Input RS

Block Codes

Encoder

Rician Noise Generator Comm Sources

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Names of Blocks in Version 1.x and Version 2, Where Different (Continued)

Old Block Name (Version 1.x)

New Block Name (Version 2)

SSB ADM SSB AM Demodulator

Passband

SSB ADM CE SSB AM Demodulator

Baseband

SSB-AM SSB AM Modulator

Passband

SSB-AM CE SSB AM Modulator

Baseband

Sample Time Eye-Pattern Diagram

Discrete-Time Eye and Scatter Diagrams

&ScatterPlot

Scheduled Reset

Integrate and Dump

Integrator

Signal Quantizer Sampled Quantizer

Encode

Triggered Signal Quantizer

UniformRandomNoise Generator

Enabled Quantizer Encode

Uniform Noise Generator

Library Location

Analog Passband

Analog Baseband

Analog Passband

Analog Baseband

Comm Sinks

Integrators

Source Coding

Comm Sources

Uniform Random Integer Generator

Random Integer Generator

VCO Voltage-Controlled

Oscillator

Comm Sources

Communications Blockset™ Release Notes

Obsolete Blocks

Compatibility Considerations

The table below Communicatio Release 12 Com lists blocks t block require compared to t for the simil

lists blocks that appear in the previous version of the

ns Toolbox User’s Guide but that are not included in the

munications Blockset. Where applicable, the second column

hat provide similar functionality. In some cases, the similar

s different parameter settings, data formats, or signal attributes

he original block. Therefore, you should read the documentation

ar block before using it in your model.

Blocks Not i

Obsolete Block Similar Block(s), if Any

Array Function See Math library in Simulink.

BCH Code View Table Use bchpoly in Communications

BCH Decode Sequence In/Out BCH Decoder.

BCH Encode Sequence In/Out BCH Encoder.

Coherent MFSK Corr Demod

Coherent MFSK Demod

Coherent MFSK Demod CE

Complex Filter See Filtering library in DSP

Convolutional Decode Sequence In/Out

Convolutional Decode Vector In/Out

Convolutional Encode Sequence In/Out

Convolutional Encode Vector In/Out Convolutional Encoder

n v2, and Sim ilar v2 Blocks

Toolbox.

Blockset.

Viterbi Decoder.

Viterbi Decoder

Convolutional Encoder.

Cyclic Decode Sequence In/O ut Binary Cyclic Decoder.

Cyclic Encode Sequence In/O ut Binary Cyclic Encoder.

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Blocks Not in v2, and Similar v2 Blocks (Continued)

Obsolete Block Similar Block(s), if Any

DPSK Demod M-DPSK Demodulator Passband

DPSK Mod M-DPSK Modulator Passband

D-TDMA Demux

D-TDMA Mux

Edge Detector

Envelope Detector

Edge Detector in DSP Blockset

Maximum, Minimum in DSP

Blockset

Error Counter Counter, in DSP Blockset

Error Rate Meter

Hamming Decode Sequence In/Out

Hamming Encode Sequen c e In/Out

Hilbert Filter

Error Rate Calculation

Hamming Decoder.

Hamming Encoder.

Remez FIR Filter Design in DSP

Blockset

Integer Scalar to Vector Integer to Bit Converter

Integer Vector to Scalar Bit to Integer Converter

Interleave Matrix Interleaver

K-Step Delay Integer Delay in DSP Blockset

Limited Binary Error Channel Binary Vector Noise Generator

Linear Block Decode Sequence

Binary Linear Decoder. In/Out

Linear Block Encode Sequence

Binary Linear Encoder. In/Out

MASK Demap

MASK Demod M-PAM Demodulator Passband

MASK Demod CE M-PAM Demodulator Baseband

MASK Map

Communications Blockset™ Release Notes

Blocks Not in v2, and Similar v2 Blocks (Continued)

Obsolete Block Similar Block(s), if Any

MASK Mod M-PAM Modulator Passband

MASK Mod CE M-PAM Modulator Baseband

Mean and Variance

Mean, Variance in DSP Blockset

Mean and Std Mean, Standard Deviation in DSP

Blockset

MFSK Map

MFSK Mod M-FSK Modulator Passband

MFSK Mod CE M-FSK Modulator Baseband

Min/Max Demap

Min/Max Index

Maximum, Minimum in DSP

Blockset

Modulo

Math F unction in Simulink

MPSK Correlation Demodulation

MPSK Demod M-PSK Demodulator Passband

MPSK Demod CE M-PSK Demodulator Baseband

MPSK Map

MPSK Mod M-PSK Modulator Passband

MPSK Mod CE M-PSK Modulator Baseband

MSK Demod MSK Demodulator Passband

MSK Mod MSK Modulator Passband

Noncoherent M FSK Corr Demod

Noncoherent MFSK Demod M-FSK Demodulator Passband

Noncoherent M FSK Demod CE M-FSK Demodulator Baseband

Number Counter Counter, in DSP Blockset

OQPSK Demod OQPSK De modulator Passband

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Blocks Not in v2, and Similar v2 Blocks (Continued)

Obsolete Block Similar Block(s), if Any

OQPSK Mod OQPSK Modulator Passband

QADM General Q AM De modulator

Passband

QADM CE General Q AM De modulator

Baseband

QAM General QAM Modulator Passband

QAM CE General QAM Modulator Baseband

QASK Demap Arbitrary Constellation

QASK D em ap Circle C onstellation

QASK Demap Square Constellation

QASK Demod Arbitrary Constellation

QASK D emod CE Arbitrary Constellation

QASK Demod CE Circle Constellation

QASK Demod CE Square Constellation

General Q AM De modulator

Passband

General Q AM De modulator

Baseband

General Q AM De modulator

Baseband

Rectangular QAM Demodulator

Baseband

QASK D em od Circle Constellation General QAM Demodulator

Passband

QASK Demod Square Constellation Rectangular QAM Demodulator

Passband

QASK M ap Arbitrary Constellation

QASK Map Square Constellation

QASK Mod Arbitrary Constellation General QAM Modulator Passband

QASK Mod CE Arbitrary

General QAM Modulator Baseband Constellation

Communications Blockset™ Release Notes

Blocks Not in v2, and Similar v2 Blocks (Continued)

Obsolete Block Similar Block(s), if Any

QASK Mod CE Circle Constellation General QAM Modulator Baseband

QASK Mod CE Square Constellation Rectangular QAM Modulator

QASK Mod Circle Constellation General QAM Modulator Passband

QASK Mod Square Constellation Rectangular QAM Modulator

Raised Cosine Filter

Rayleigh Fading CE Channel Multipath Rayleigh Fading Channel

Rayleigh Noise CE Channel Rayleigh Noise Generator

Baseband

Passband

Reed-Solomon Decode Binary

Binary-Output RS Decoder. Sequence In/Out

Reed-Solomon Decode Integer

Integer-Output R S Decoder. Sequence In/Out

Reed-Solomon Encode Binary

Binary-Input RS Encoder. Sequence In/Out

Reed-Solomon Encode Integer

Integer-Input RS Encoder. Sequence In/Out

Rician Noise CE Channel Rician Noise Generator

Sampled R ead From Workspace Signal From Workspace in DSP

Blockset

Sinc

Time-Share Demux

Time-Share Mux

Triggered Read from Workspace Triggered Signal From Workspace

in DSP Blockset

Triggered Write to Workspace

Triggered To Workspace in DSP

Blockset

Version 2.0 (R 12) Communications Blockset™ Software Release Notes

Blocks Not in v2, and Similar v2 Blocks (Continued)

Obsolete Block Similar Block(s), if Any

Varying AWGN Channel

Varying Rayleigh Fading CE Channel

Varying Rayleigh Noise CE Channel

Varying Rician Noise CE Channel

Vector Pulse

Vector Redistributor

Discrete Pulse Generator in

Simulink

Communications Blockset™ Release Notes

Compatibility Summary for Communications Blockset Software

This table summarizes new features and changes that might cause incompatibilities when you upgrade from an earlier version, or wh en you use files on multiple versions. Details are provided in the description of the new feature or change.

Version (Release) New Features and Changes with

Version Compatib ility Impact

Latest Version V4.4 (R2010a)

V4.3 (R2009b)

V4.2 (R2009a) See the Compat ib ility

V4.1 (R2008b)

See the Compatibil ity

Considerations subheading

for each of these new features or

changes:

• “Sample-Based Row V ector

Processing Change s” on page 5

• “New CMA Equalizer Default

Setting” on page 6

None

Considerations subheading

for each of these new features or

changes:

• “DPSK Modulator Baseband

Block Enhancements” on page 13

None

Compatibility Summary for Communications Blockset™ Software

Version (Release) New Features and Changes with

Version Compatib ility Impact

V4.0 (R2008a) See the Compat ib ility

Considerations subheading

for each of these new features or

changes:

• Demos

V3.6 (R2007b) See the Compat ib ility

Considerations subheading

for each of these new features or

changes:

• “TCM Decoder Blocks Enhanced”

on page 23

V3.5 (R2007a) See the Compat ib ility

Considerations subheading

for each of these new features or

changes:

• “M-FSK Modulator Block Errors

When Used with Sample-Based Signals and Multitasking Solver” on page 27

Communications Blockset™ Release Notes

Version (Release) New Features and Changes with

V3.4 (R2006b) See the Compat ib ility

V3.3 (R2006a) See the Compat ib ility

Version Compatib ility Impact

Considerations subheading

for each of these new features or

changes:

• “Binary Error Pattern Generator

Block Is Obsoleted” on page 29

• “Binary Error Pattern Generator

Block Is Obsoleted” on page 29

• “Obsolete Blocks” on page 88

Considerations subheading

for each of these new features or

changes:

V3.2 (R14SP3)

• “Rician Fading Channel Block Is

Obsoleted” on page 36

• “SSB AM Passband Block Output”

on page 36

• “saveas_commblks Obsoleted” on

page 37

None

Compatibility Summary for Communications Blockset™ Software

Version (Release) New Features and Changes with

Version Compatib ility Impact

V3.1 (R14SP2)

V3.0.1 (R14SP1)

See the Compatibil ity

Considerations subheading

for each of these new features or

changes:

• “PN Sequence Generator Block

Allows Mask Bits from Input Port” on page 27

• “Improvements and Changes to

the Multipath Rayleigh Fading Channel Block” on page 43

• “Discrete-Time VCO Block” on

page 43

• “Voltage Controlled

Oscillator Block Renamed to Continuous-Time VCO” on page 44

• “CPM Modulator Baseband and

GMSK Modulator Baseband Blocks” on page 44

None

V3.0 (R14)

See the Compatibil ity

Considerations subheading

for each of these new features or

changes:

• “Changes in BCH Encoder and

BCH Decoder” on page 54

• “Changes in Fading Channel

Blocks” on page 54

• “Changes in Integrators” on page

Communications Blockset™ Release Notes

Version (Release) New Features and Changes with

Version Compatib ility Impact

• “Change in Error Rate Calculation

Block” on page 56

• “Version 1.3 Libraries Removed”

on page 57

• “Obsolete Blocks” on page 30

• “Blocks Now in Different Library

Locations” on page 59

• “Changes in Block Dialog Boxes”

on page 61

• “Changes in commstartup

Function” on page 62

• “Simulation Settings of Legacy

Models” on page 62

V2.5 (R13)

See the Compatibil ity

Considerations subheading

for each of these new features or

changes:

• “Old Models Using the Baseband

or Passband SSB Modulators Must Be Resaved” on page 71

• “Change the Boolean Logic

Signals Para m e ter to Off” on page 71

Mathworks COMMUNICATIONS BLOCKSET RELEASE NOTES RELEASE NOTE

Specifications and Main Features

Frequently Asked Questions

User Manual

SummarybyVersion

New Features and Changes

Using Release Notes

What Is in the Release Notes

Version Compatibility Con si derations

Fixed Bugs and Known Problems

Version 4.4 (R2010a) Communications Blockset Software

HDL Code Generation Suppor t

Support for the For Each subsystem

Sample-Based Row Vector Processing Changes

Compatibility Considerations

New CMA Equalizer Default Setting

Compatibility Considerations

Demos

Version 4.3 (R2009b) Communications Blockset Software

Error Vector Magnitude (EVM) Measurement Block

Modulation Error Ratio (MER) Measurement Block

Enumerated Data Type Support

New Demos

Version 4.2 (R2009a) Communications Blockset Software

Orthogonal STBC Capability

Constellation V isualization for Linear Modulator Blocks

Fading Channel Blocks Now Support Bell-shaped Doppler spectrum

DPSK Modulator Baseband Block Enhancements

Compatibility Considerations

Version 4.1 (R2008b) Communications Blockset Software

Initialization Enhancements to BCH blocks

Per Path Specification For Rician Channels

Code Generation Support for Signals Greater than 32 Bits

Convolutional Encoder Changes

New Data Support Table

Support for Normal Mode Model Reference

Demos

Version 4.0 (R2008a) Communications Blockset Software

Fixed Point Support for N ew Blocks

Demos

Version 3.6 (R2007b) Communications Blockset Software

BPSK, MPSK, and QPSK Demodulator Blocks Enhanced

New Demos

Compatibility Considerations

Version 3.5 (R2007a) Communications Blockset Software

Compatibility Considerations

PN Sequence Generator Block Allows Mask Bits from Input Port

Version 3.4 (R2006b) Communications Blockset Software

Fixed Point Capability Added to Various Blocks

Fixed-Point MSK Demo

Binary Error Pattern Generator Block Is Obsoleted

Compatibility Considerations

Compatibility Considerations

Compatibility Considerations

Version 3.3 (R2006a) Communications Blockset Software

Rician Channel Block Enhanced

Viterbi Decoder Block Updated with Puncturing and Erasing

Convolutional Encoder Block Updated

M-PSK and Rectangular QAM Blocks Enhanced

Demodulator Blocks Enhanced

Additional C Data Type Support

Phase/Frequency Offset Block Enhanced

Reed Solomon Decoder Block Enhanced

DVBS2 Demo

Obsolete Block Warning

Rician Fading Channel Block Is Obsoleted

Compatibility Considerations

SSB AM Passband Block Output

Compatibility Considerations

saveas_commblks Obsoleted

Compatibility Considerations

Version 3.2 (R14SP3 ) Communications Blockset Software

Analog Modulation Library Enhancement

Many Blocks Updated to Work Within Triggered Subsystems

Additional C Data Type Support

Two Parameters Now Tunable for Error Rate Calculation Block

New Demo of Timing Recovery Using Fixed-Rate Resampling

Version 3.1 (R14SP2 ) Communications Blockset Software

C Data Type Support for 26 Blocks

Some Blocks Now Work in a Triggered Subsystem