LG TTAG11NE User Manual

LG Electronics Inc. 1 17-8-8

Descriptive Information

Technical Description

The RF platform of GEN11 supports highly integrated LTE/UMTS/GSM-transceiver, with all necessary features
to enable multi mode, multi band car telematics applications. It incorporates a fully integrated dual mode
receiver, multi band TX outputs, TCVCXO control, a measurement interface, Qualcomm(Transceiver / Modem)
compliant high speed data and control interface, a multi mode timer unit and all necessary front end signals
for the complete RF Engine control. Overall the GEN11 directly supports RF engines with up to GSM bands,
WCDMA bands and LTE bands.

1. RF Transceiver (WTR3925)

Multimode operation (See modem IC documents for specific capabilities)

- 3GPP GSM, GPRS, and EDGE (WTR3925/WTR3905 only)

- 3GPP WCDMA Rel 99, HSDPA, HSUPA, HSPA+

- 3GPP LTE FDD and TDD, with carrier aggregation (WTR3925 only)

- TD-SCDMA

LTE carrier aggregation

- WTR3925 only

- Downlink inter-band (20 MHz and 20 MHz)

- Downlink intra-band

– Non-contiguous 20 MHz + 20 MHz
– Contiguous, 40 MHz for certain bands

-

1) RF Transmitter Part

Transmit signal paths

- Ten single-ended Tx outputs (4 LB, 4 MHB, and 2 HMLB) – WTR3925/WTR3905 only

- Six single-ended Tx outputs (3 LB, 2 MHB, and 1 HMLB) – WTR3900 only

- One 4-line analog baseband interface from modem IC (differential I and Q)

- One baseband-to-RF quadrature upconverter supports all Tx bands

- RF AGC amplifiers and filters

LO generation and distribution

- Single Tx PLL; divider and distribution circuits to support all Tx bands

Tx bandpass filters

- Eliminated for most modes/bands supported

1/12

LG Electronics Inc. 2 17-8-8

2) RF Receiver Part

Primary receiver paths

- 14 single-ended PRx inputs (4 LB, 5 MB, 1 MLB, 4 HB)

- Three PRx/CA1 RF-to-baseband quadrature downconverters (LB, MB, HB)

- Three PRx/CA2 RF-to-baseband quadrature downconverters (LB, MB, HB)

- Baseband filtering and amplifiers

- Two single-ended I and Q interfaces to modem IC (PRx/CA1, PRx/CA2)
Diversity receiver paths

- 14 single-ended DRx inputs (4 LB, 5 MB, 1 MLB, 4 HB)

- Three DRx/CA1 RF-to-baseband quadrature downconverters (LB, MB, HB)

- Three DRx/CA2 RF-to-baseband quadrature downconverters (LB, MB, HB)

- Baseband filtering and amplifiers

- Two single-ended I and Q interfaces to modem IC (DRx/CA1, DRx/CA2)

2. RF Transceiver (WTR4905)

Multimode operation (See modem IC documents for specific capabilities)

- 3GPP GSM, GPRS, and EDGE

- 3GPP WCDMA Rel 99, HSDPA, HSUPA, HSPA+

- 3GPP LTE FDD and TDD

Advanced RF techniques

- Mobile Rx diversity (but not SHDR due to single Rx VCO)

- Simultaneous GNSS

1) RF Transmitter Part

Transmit signal paths

- Wideband single-ended Tx outputs

- WTR4905 = 5

- 4-line analog baseband interface from modem IC (differential I & Q)

- One baseband-to-RF quadrature upconverter supports all Tx bands RF AGC amplifiers

LO generation and distribution

- Tx PLL; divider and distribution circuits to support all Tx bands

External Tx bandpass filters

- Eliminated for most modes/bands supported

2) RF Receiver Part

Primary receiver paths

- Single-ended PRx inputs

WTR4905 = 8 (3 LB, 3 MB, 2 HB)

2/12