ZXSDR BS8900 Hardware Manual
1X Channel Process Module with
Optical Interface (CVI)
Function
The 1X channel process module with optical interface
CVI
provides
the following functions:
�
Provision of baseband-RF remote optical interfaces.
�
It provides 4
CPRI
interfaces, that is, baseband remote
fiber interfaces .
�
Forward: It implements baseband data multiplexing and
framing and then sends these data to
RSU
/
RRU
through
optical interface.
�
Reverse: It sends the data from RSU/RRU to the baseband
process unit after performing deframing and demultiplexing
on the data.
�
IQ exchange.
It supports IQ exchange between the local board and other
AMC
slot channel board for channel sharing.
�
1X channel processing.
�
The module implements multiple key CDMA technologies
such as diversity, RAKE reception, softer handoff and power
control.
�
It implements baseband forward modulation and reverse
demodulation.
It supports the following physical channels:
Forward: Pilot channel, synchronous channel, paging chan-
nel, quick paging channel, forward dedicated control chan-
nel, forward common channel, forward supplemental chan-
nel, and forward supplemental code channel.
Reverse: Access channel, reverse pilot channel, reverse
common channel, reverse supplemental channel and re-
verse dedicated control channel.
Note:
The CVI module can be also used as 1X channel process module
without being configured with optical interfaces.
Principle
The CVI module comprises CPU unit, FPGA IQ exchange unit,
CSM6700 system, ARM subsystem, clock unit, Ethernet interface
and optical transceiver. The CVI module can work in F (CVI-F)
mode or C (CVI-C) mode when being loaded different FPGA
versions.
CVI-F integrates FS and CHV functions.
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