Chapter 2 System Structure
Name
Function
Baseband
l
Provides CDMA1X and EV-DO modulation and demodulation;
l
Provides the interface with RF link and intermediate frequency
processing.
Control
l
Provides FE\GE Ethernet access;
l
Provides controls over units inside the system.
Clock
l
Receives GPS satellite signals, provides system clock and RF reference
clock.
l
Provides various clocks used by the system internally.
Power
Provides system power distribution.
2.3 Signal Processing Flow
The internal signal processing flow of ZXSDR BS8802 C100 is as below:
l
Forward link processing
The business data from BSC enters the baseband unit through the control unit, and
then for CDMA modulation and intermediate frequency processing. After the power
amplification of TX unit RF link, it is sent to the antenna for transmission.
l
Reverse link processing
The reverse CDMA signals from the antenna are converted to baseband digital signal
after being processed by RX unit. After signal processing, it is processed by the control
unit and packed into Ethernet frame. It is finally transmitted to the BSC via Ethernet.
2-3
SJ-20110329145303-001|2011–10–25 (R1.1)
ZTE Proprietary and Confidential
