spirent Wireless Channel emulator
SR5500 Wireless Channel Emulator
The SR5500 re-creates RF fading and interference effects for testing SISO and MIMO wireless
receivers. An advanced fading engine ensures accurate testing of sophisticated technologies
like LTE, HSPA, HSPA+, EV-DO, WLAN and WiMAX.
APPLICATIONS
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Research and Development
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Design Verification
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Conformance Testing
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Performance Testing (Virtual Drive Testing)
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Product Evaluation
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Base Station, Node-B and Terminal Device Testing
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Diversity, MIMO and Beamforming
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LTE, GSM, GPRS, EDGE, WCDMA, HSPA and HSPA+
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CDMA2000 1X and EV-DO
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WiMAX (802.16) Fixed and Mobile
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Spatial Channel Modeling
(SCM, SCME, and WINNER/WINNER-II)
The SR5500 provides extremely realistic yet repeatable
emulation of RF channel conditions for testing modern wireless
receivers. The emulator replicates real-world fading, spatial
channel conditions, MIMO and SISO channels, Additive White
Gaussian Noise (AWGN) and much more, making it possible
to isolate performance issues early in the development and
design verification cycle. The SR5500 is the most flexible
channel emulator ever offered. It can be tailored to fit today’s
requirements and budgetary business cases, yet its futureproofed modular architecture ensures that it will be ready to meet
your needs in years to come.
FEATURES & BENEFITS
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Maximize the return of your test equipment investment with
Spirent’s exclusive building-block approach - enables flexible
re-use of system modules
•
Bring the “real world into the lab” - Spirent’s exclusive
Fading Lab & Virtual Drive Test provides a cost-controlled yet
accurate and repeatable alternative to field testing..
•
Reduce risk with a proven turnkey platform, designed and
supported by wireless experts and industry leaders; the
industry’s first choice in large new technology deployments
(LTE, CDMA 1X, EV-DO, EV-DO Rev A, HSPA, etc.)
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
Today’s wireless industry faces many uncertainties, including a
quickly-evolving technology front. Responsible test plans require
efficient, customizable integrated solutions that can address both
current and future needs without incurring unnecessary risks. To
accelerate time to market without forgoing accuracy, Spirent’s
unique real-world emulation continues to be the first choice in
test plans.
The RF Interface
turns multiple
SR5500
modules into an
integrated
bi-directional
MIMO test
station.
MAXIMIZING THE RETURN ON YOUR TEST
EQUIPMENT INVESTMENT
The SR5500 system can be purchased as a system solution
or a fully modular solution. The only difference is that the
modular version allows each SR5500 module to be run under
its own GUI. While each module can be run independently in
either case, the modular solution allows any module or set of
modules to run under a separate GUI.
The integrated system solution
The SR5500 system solution makes use of one primary unit
and one or more secondary modules. Unlike pre-racked
fading “systems”, each module can be either independently
controlled or used as part of a synchronized MIMO/bidirectional channel emulation solution. And unlike other
monolithic faders, the SR5500 System Solution can be
upgraded if you need each module to have the “brains” to
interface with a separate GUI… for occasional use in separate
labs, for example. Spirent’s System Solution eliminates the risk
that the fading solution you choose today might be obsolete
tomorrow.
Spirent SR5500 system solutions are the perfect answer when
you require the best in professional fading and RF emulation
today, and your test benches are co-located so they can
connect to a single Ethernet interface. For owners of existing
SR5500 Wireless Channel Emulators, the system solution also
provides a budget-friendly upgrade to higher-order MIMO or
bi-directional testing. Best of all when your needs expand,
secondary modules can easily be upgraded to full stand-alone
capability.
The modular S
R5500 solution
Sometimes you need the flexibility to test with multiple systems,
each with fewer channels, but located in separate labs. The
exclusive modular architecture of the SR5500 makes sure that
you can concentrate fading power when you need it, but reconfigure as quickly and as often as you need to.
For example, one day you might need a completely synchronized
8x2 bi-directional MIMO environment for prototype testing in an
Advanced Projects lab. The next day you might need independent
2x2 MIMO test stands in separate labs. With the SR5500’s
“building block” architecture you can seamlessly move between
multiple simple test stands and the more concentrated capability
of a complex integrated system. No matter what configuration you
deploy, you’ll have a single intuitive interface that easily makes
use of all the SR5500’s unique advanced features.
Whether you choose a fully modular solution or a pre-configured
static system solution, your turnkey SR5500 system will be up
and running and ready to go upon delivery.
Some engineers like to personally choose the RF “plumbing”
required for bi-directional testing. For those who do not, the
optional RF Interface integrates all the circulators and splitters
necessary for integrated bi-directional MIMO testing, and adds
precise “dial-in” attenuation on a per-path basis.
MINIMIZE BUSINESS AND TECHNOLOGY RISKS
Support and Expertise
The SR5500 team includes industry experts and leaders who
have dedicated many years to the study of the wireless physical
layer. Our close relationships with key industry drivers and our
involvement with standards organizations make certain that your
SR5500 will have the feature set you need, when you need it.
Spirent’s wireless expertise extends far beyond the radio link,
ensuring that channel emulation accounts for all the factors that
affect real-world operation. Key areas of Spirent Physical Layer
expertise include:
•
CDMA
•
W-CDMA
•
WiMAX
•
High-data-rate technologies [EV-DO & HSPA(+)], LTE, MIMO
•
Beamforming
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
•
Spatial channel modeling
•
Over-the-air (OTA) testing, and much more
No matter what technology you’re working with, Spirent has
qualified experts to make sure that your testing meets your
intentions, and that you’ll have the features you need when you
need them.
Spirent’s rich history of leadership in wireless development has
established the SR5500 as the most accurate, efficient, easy-touse solution available.
Spirent’s Channel emulation history
When a fader is used in an initial large-scale technology
deployment, “getting it wrong” can make or break a business. In
these cases the selection of a fading emulator includes research,
rigorous evaluation and head-to-head comparative evaluations.
Spirent fading emulators were chosen for the world’s most
important rollouts of new wireless technologies, including the
first commercial deployments of 1x CDMA, WCDMA, FOMA, HSPA,
WiMAX, and several revisions of EV-DO. They were also behind
the development of the first RX Diversity device, the first Smart
Antenna system, the first MIMO proof-of-concept system, and are
currently used in developing LTE base stations and devices.
Spirent actively participates in dozens of industryleading organizations; here are just a few.
Spirent’s leadership in channel modeling has led to many
industry firsts, including: the first emulator to integrate I/O power
meters for accuracy, the first integrated AWGN, the first modular
RF channel emulation system, the first dynamic correlation
modeling and much more.
When your business depends on the quality of information you
provide, remember that the SR5500 is always the first choice in
business-critical deployments.
Spirent fading emulators were behind the world’s
most important wireless technology rollouts.
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
BRINGING THE REAL WORLD INTO THE LAB
Virtual Drive Test
Spirent’s Virtual Drive Test lets you create or re-play dynamic
mobility scenarios in your lab. Virtual Drive Test is more than a
way to control the costs of drive-testing. Unlike drive-testing in
the field, Virtual Drive Test provides a precise and repeatable
environment.
Virtual Drive Test uses Spirent’s exclusive Dynamic Environment
Emulation (DEE) real-time engine to add automated control of
rapidly-changing environmental channel parameters. Handover
conditions, drive-test scenarios, and any other dynamic scenario
can be easily created.
Sometimes you absolutely need to test under the conditions
defined by an actual drive-test route. Spirent’s exclusive VDTConversion Tool takes data captured with a cellular scanner and
lets you re-create the RF environment in your lab.
We all know that MIMO and Diversity systems are dependent on
the physical orientations of mobile devices. Have you considered
the importance of testing under realistically time-varying
orientations (in other words, motion scenarios)? We have. The
SR5500’s Dynamic Correlation is ready to help you find those
motion-based glitches you might have missed otherwise.
Spirent’s VDT-Conversion Tool makes it easy to “play back” an RF
environment captured with a scanner.
SCM/SCME CORRELATION MATRIX GENERATOR
The included SCM/SCME Correlation Matrix Generator lets you
create customized spatial channel models in minutes. You enter
a few key parameters such as antenna spacing, angles of arrival/
departure and angular spreads, and it generates correlation
matrices that can be plugged directly into the SR5500’s software.
DYNAMIC SCM/SCME
The SR5500 is ready to meet the demands of time-evolving
spatial channel models such as those imposed by the WINNER II
interim channel models specification.
In order to more realistically test receivers using spatial channel
models, the industry has developed a series of channel modeling
scenarios that emulate the evolution of a connection session
over time. One scenario, called “drop modeling”, is implemented
in the SCM. In drop modeling the RF channel behaves as if the
receiver suddenly “dropped” from one physical location and reappeared in another. These models don’t entirely reflect the more
accurate scenario and its effect on small-scale parameters such
as delays and angles-of-departure. The SR5500 can, of course,
implement this required yet artificial approach.
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
In the interest of better testing, some advanced groups such as
WINNER have proposed the execution of “time-evolving” channel
modeling. A much more accurate approach, its use has been
limited by the abilities of many channel emulators. Of course,
with the SR5500’s DEE, none of this is a problem. The SR5500
easily and automatically handles the required smooth transitions
that stump other emulators.
In fact, the SR5500 is also unique in that both drop models and
time-evolving models can be customized. With DEE, you are not
stuck with whatever time-based scenario someone else thought
was important.
SGW
PGW
MME
The SR5500 easily generates drop models (top) and timeevolving models (bottom).
Dynamic motion can cause unique momentary RF conditions.
Find out if your design is up to it… before deployment.
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
FADING LAB
The pace of the wireless industry often changes your plan. Urgent
test requirements come out of nowhere; you can’t risk having a
job to do and no way to do it, even when that job requires a new
or customized fading model. The SR5500 is the first and only
channel emulator to offer both a real-time engine and a fadingdata playback engine, ensuring that you don’t risk running into a
testing requirement your fader can’t deliver.
Spirent’s Fading Lab adds the flexibility to “play back” custom
fading data available from a wide variety of sources. Input data
can be:
•
Captured by a channel-sounding system
•
Generated in standard mathematical software
•
Generated by ray-tracing software or custom software
Whether captured via a channel sounder or created in
mathematical software, RF data captured as a file can be
“played back”, ensuring accurate reproduction of the RF channel
conditions you need.
Fading Lab includes Fading Studio, Spirent’s exclusive modelgeneration platform. Now you can easily execute complex spatial
channel modeling scenarios. SCM and SCME models are all right
at your fingertips and ready to run.
Go beyond the standards by using Fading Studio to create more
realistic models. Standards-based models are often based on
simplistic assumptions. Once you’re sure that your device passes
conformance testing, go beyond conformance with more realistic
models. Be confident that what your device does in the lab is
what it will do after deployment.
Spirent’s Fading Studio lets you create complex customized geometric models
(i.e. spatial channel models) by entering a few parameters.
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
RF Inputs
RF Outputs
Digital Channels
RF Configurations
Bandwidth
Crest Factor
RF Input
Input Power Meter
RF Output Level
Noise Floor
Residual EVM
RF Port VSWR
Independent Paths
Relative Path Delay
Relative Path Loss
Insertion Loss
Dynamic Standard
Dynamic Environment Emulation
Standards-Based Models
Other Models
Fading Engine Type
Scalable from 2 to 16
Scalable from 2 to 16
Scalable from 2 to 64
SISO, SIMO, MISO, MIMO, and Beamforming
•
2x2, 4x4,4x1/1x4, 4x2/2x4 uni- or bi-directional
•
8x1/1x8, 8x2/2x8 uni- or bi-directional
26 MHz
+15 to +35 dB (0.1 dB resolution)
Frequency Range
(w/ 6-GHz-EX option) 400 – 2700 MHz
3300 – 3850 MHz
4100 – 6000 MHz
Measurable Level Range +5 to -50 dBm
Level Resolution 0.01 dB
Damage Level > +20 dBm
Modes
•
Continuous
•
RF Burst-triggering for gated signals
•
Settable duty cycle
Max/Min Range -20 to -110 dBm (RMS)
[-30 to -110 dBm without extended output power option]
Maximum output power (peak) + 8 dBm (using the calculation method used by other test
equipment manufacturers)
Resolution 0.01 dB
Accuracy ± 1 dB
Typical values at 2.1 GHz -167 dBm/Hz @ -43dBm output power
-171 dBm/Hz @ -50dBm output power
-174 dBm/Hz @ -65dBm output power
Better than -36 dB typical per sub-carrier, measured at -50 dBm output power; actual value depends
upon signal format, symbol rate, etc.
Better than 1.5:1
up to 24 paths per channel (768 total paths)
0 – 2000 µs, 0.1 ns resolution
0 – 32 dB
0 dB @ input power ≤ -30 dBm
•
Channel Parameters
Sliding Delay (moving propagation)
•
Birth-death Delay
•
3GPP High-Speed Train (HST) profiles
•
Log Normal (shadow Fading)
Controllable Parameters State duration, channel output level, AWGN on/off, C/N, path
on/off, relative power and delay, LOS AoA, K factor, frequency
shift, Doppler velocity, MIMO branch phase and power imbalance.
Channel Model Update Rate 100 times per second
Mode MIMO, dual and single channel mode; RX and TX diversity modes
Triggering Triggered Play, Free Run
LTE, WiMAX, UMTS, CDMA2000®, WLAN, GSM, SCM/SCME, and pre-standard models available from
Customer Service Center
SCM, SCME, WINNER and WINNER-II models; custom geometric channel models
Fading Engine 1: Real-time generation of fading environment
Fading Engine 2: Fading Lab (Fading Data Playback) engine
TECHNICAL SPECIFICATIONS (CONT’D)
SPIRENT WIRELESS CHANNEL EMULATOR
SR5500 Wireless Channel Emulator
Real-time Fading
Log-Normal Fading
MIMO Option
AWGN (option)
Fading Lab (option)
Control Interface
Other
Types Rayleigh, Rician, Pure Doppler, Frequency shift, Phase shift
Fading Velocity Up to 5396.26 km/h @ 400 MHz; Resolution of 0.1 km/h
Repetition Interval > 24 hours
Relative Phase
Rician K factor -30 to +30 dB
Level Crossing Rate (LCR) Accuracy < ± 2.5% deviation from theoretical LCR
curve of the simulated vehicle velocity
Fading Power Spectrum Classical 6 dB, Flat, Classical 3 dB, Rounded, Rounded 12 dB
Correlation Envelope and Component; Complex correlation is included with
MIMO option
Log-Normal Rate 0.00 to 20.00 Hz
Standard Deviation 0 to 12 dB
Modes Up to 8 x 2 bi-directional
C/N Ratio -30 to +32 dB
Accuracy ± 0.1 dB for -20 to 15 dB ratios
Bandwidth up to 26 MHz
Fidelity Meets or exceeds all 3GPP, 3GPP2, WLAN, WiMAX, and LTE
requirements
Sequence Duration > 2 hours
Settable Modes C/N, C/No, Eb/No
Play back fading data collected via a channel sounder or synthesized in software
Ethernet or GPIB
10 MHz internal reference accuracy 1 ppm, can be locked to external reference
AC Power 250 watts typical steady state
45 watt maximum additional for 6 GHz Option
Dimensions 19-inch rack mountable
Height/Width/Depth: 8.75”/16.88”/21”
(22.22 cm/42.88 cm/53.34 cm)
Weight 65 pounds (29.5 kg)
0 – 360 degrees, 0.1 degree resolution
ORDERING INFORMATION
Due to the wide range of available system configurations, please contact your regional
Spirent sales representative for detailed ordering information.
SPIRENT GLOBAL SERVICES
Spirent Global Services provides a variety of professional services, support services
and education services — all focused on helping customers meet their complex testing
and service assurance requirements. For more information, visit the Global Services
website at www.spirent.com/gs or contact your Spirent sales representative.
AMERICAS 1-800-SPIRENT • +1-818-676-2683 • sales@spirent.com
EUROPE AND THE MIDDLE EAST +44 (0) 1293 767979 • emeainfo@spirent.com
ASIA AND THE PACIFIC +86-10-8518-2539 • salesasia@spirent.com
© 2010 Spirent Communications, Inc. All of the company names and/or brand names and/or product names referred to in this document,
in particular the name “Spirent” and its logo device, are either registered trademarks or trademarks pending registration in accordance with
relevant national laws. All rights reserved. Specifications subject to change without notice. Rev. J 09/10
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