提出一种适用于数字微波接力系统的基

带光纤拉远的接口方案 采用高性能千兆以太网物理层芯片 88E1111 和 1.25G 光收发器 SSFF3151 完成基带接口

基带信号可以通过数字光纤传输技术传到远端 并恢复射频信号 介绍了 88E1111 的工作原理 性能 接口等 并给出硬件电路设计的原理 以及各部分的具体实现方法和原理图 -Compared with the traditional RF and IF pulls distant technology the baseband optical pulls distant technology

has some obvious superiority,especially in feeder line processing and choice of station site it has become the main pulls

distant technology in 3G network such as TD SCDMA.Refering to the baseband optical pulls distant technology in 3G

network the paper proposes a scheme which is suitable for the digital microwave relay system.The design uses high

performance Gigabit chip 88E1111 and 1.25G optical transceiver SSFF3151 to compelete the baseband interface.The signal

transmits to the remote through the digital fiber and restores the radio frequency signal.This paper introduces 88E1111 s

principle performance interface the hardware circuit design principles as well as part of the concrete implementation and

schematic diagrams.The scheme satisfies the baseband transmision in the stability and the error rate aspect.It can be used in

kinds of digital microwave relay systems.