一种RRU与IDU的光转换接口的设计与实现

Design and implementation of optical convertible interface between RRU and IDU

设计了一种基于FPGA的RRU光口与微波传输系统IDU之间的转换接口,在下行方向上,将近端RRU光口基于CPRI协议的光信号按照文中所提出的传输协议转换为ST-M1速率的信号,使之与微波SDH传输速率相匹配,上行方向则进行相反的过程。实验室测试结果表明,该方法切实有效,传输时延为49μs左右,且误码率小于10-12,满足系统的整体指标要求。

This paper introduces a convertible interface between RRU and IDU based on FPGA technology. On the down link, the optical signal from the interface of local RRU based on CPRI protocol is convcrtexi into STM-1 signal according to the transmission protocol, then made match with SDH speed. On the up link, the whole process is opposite. The transmission delay is 49us and BER is less than 10-12, so the method is effective and fits the system require.