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Appendix A Outdoor BBU+RSU Cabinet
�
The forward modulation and reverse demodulation of base-
band
�
CDMA key technologies, such as diversity technique, RAKE
receiving, softer-handoff and power control
�
Mixed insertion of CHV and CHD modules to support 1x and
EV-DO service.
Principle
CHV module consists of processing unit, baseband modulation and
demodulation unit, FPGA unit, EPLD logic unit, power, Ethernet unit
and MMC unit.
Figure 18
shows the principle of CHV module.
F
IGURE
75 CHV M
ODULE
P
RINCIPLE
CHD module consists of multiplexing and de-multiplexing unit,
clock processing unit, ARM unit, DSP unit, modulation and de-
modulation unit and MPC unit.
Figure 19
shows the principle of
CHD module.
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Содержание CDMA Outdoor Basestation-8900
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