ZYNQ千兆以太网光收发模块的远距离传输设计

Long Distance Transmission Design of ZYNQ Gigabit Ethernet Optical Transceiver Module

在飞行试验中,为解决地面测试设备与远端设备数据通信过程中数据传输速率低、传输距离不足且传输可靠性差的问题,提出了一种基于ZYNQ的“千兆以太网+光收发一体模块”的远距离传输设计。首先,采用Xilinx的ZYNQ 7000系列XC7Z015作为主控芯片,PS端通过TCP协议实现与上位机的数据交互,PL端通过调用Xilinx的三速以太网IP核实现与遥测设备的UDP协议通信,PL以太网接收数据过程中设计请求重传机制,保证数据的可靠性传输。其次,增加光收发一体模块,用光缆代替电缆,通过电信号与光信号的转换增加信号传输距离。经验证,将该系统与远端设备通过20 km光缆连接,数据传输速率可达669 Mb/s,数据传输过程中无误码、无丢帧,运行稳定。

In the flight test,in order to solve the problems of low data transmission rate,insufficient transmission distance and poor transmission reliability during data communication between ground test equipment and remote equipment,a"gigabit ethernet+optical transceiver integrated module"long-distance transmission design is proposed based on ZYNQ.This design uses Xilinx's ZYNQ 7000 series XC7Z015 as the main control chip,the PS side realizes data interaction with the host computer through the TCP protocol,and the PL side realizes the UDP protocol communication with the telemetry equipment by calling Xilinx's three-speed Ethernet IP core.In the process of Ethernet receiving data,a request retransmission mechanism is designed to ensure the reliable transmission of data.Secondly,an integrated optical transceiver module is added,and the optical cable is used instead of the cable,and the signal transmission distance is increased by the conversion of the electrical signal and the optical signal.It has been verified that the data transmission rate can reach 669 Mb/s under the condition that the system and the remote equipment are connected by a 20 km optical cable,and there is no error or frame loss during the data transmission process,and the operation is stable.