Hardware Modules; Mtrw Module; Wdpa Module - Zte ZXMBW E9230 User Manual

Function
Working Principle

Hardware Modules

ZXMBW E9230 mainly consists of four modules: baseband in-
termediate frequency board MTRW, WiMAX Digital Power Ampli-
fier (WDPA), WiMAX RF Front End Filter (WRFE), and WiMAX RRU
Power Module 2 (WRPM2) DC power supply module.

MTRW Module

The baseband RF module MTRW is the core module of ZXMBW
E9230. The MTRW module provides the following basic functions.
1. MAC layer functions, including scheduling, power control, and
OMC.
2. Physical layer functions, including OFDMA modulation and de-
modulation of baseband signals.
3. RF forward channel functions, including up-converting, Digital
Predistortion (DPD) processing, and power amplifying of base-
band signals, as well as energy conversion between the electric
field and the magnetic field.
4. Reverse functions of the RF channel, including receiving, am-
plifying, and down-converting of RF signals.
5. Clock processing functions, including GPS signal receiving and
clock processing.
6. Cascading and convergence of the R6 daisy chains and stars
of the active/standby E9230, as well as clock cascading.
7. Management, monitoring, and maintenance functions of the
E9230.

WDPA Module

The WDPA module amplifies the RF power.
The WDPA module provides the following functions:
� RF amplification
� Voltage Standing Wave Ratio (VSWR) measurement
� Alarm reporting
Figure 15 shows the working principle of the
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Chapter 2 Hardware Description
WDPA module.
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