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M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3.23 TRX
3.23.1 Functions
The TRX adopts a modularized structure. It includes base band processing unit and RF
processing unit. The TRX receives signals from an MS via the antenna, and then demodulates
the signals received into signaling information and voice information for sending forward.
The downlink signaling information and voice information are sent to the antenna after being
processed by the TRX, and then are transmitted to the MS.
The TRX also receives various management and configuration information from TMU, and
reports its own status and alarm information to TMU.
The TRX supports multiple frequency bands, including the GSM900, GSM1800, GSM1900,
GSM850, EGSM, and RGSM.
3.23.2 Structure and Principle
Figure 3-53
unit (TBPU) and the RF signal processing unit (RPU).
Figure 3-53 TRX logical structure
TIMING_BUS
SCP: Signaling Processing Part
CUI: Carrier Unit Port Controller
PAU: Power Amplifier Unit
TBPU: Transceiver Baseband Processing Unit
DBUS: Data bus
FHB_US: Frequency Hopping bus
TIMING_BUS:Time bus
Issue 01 (2006-11-18)
The hardware version of the TRX described in this section is as follows:
GM51GBRU is VER.C
!
GM51LPAU is VER.A
!
GMK1ETPS is VER.C
!
shows the functional structure of TRX, including the baseband signals processing
DBUS
CBUS
SCP
TBPU
Huawei Technologies Proprietary
_
FH
BUS
DSP
CUI
Clock
processing part
DSP: Digital Signal Processor
TDP: Transmitter Driver and PLL unit
RCU: Receiver Unit
RPU: Radio frequency Process Unit
CBUS: Control bus
TBUS: Clock bus
–
TDP
PAU
Transmitting
Main receiving
RCU
Diversity receiving
RPU
3 Board
3-81
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