基于CRC+8B/10B的高速远距离传输设计  

Design of high speed and long distance transmission based on CRC+8B/10B

作　　者：杜若楠 任勇峰[1] 王淑琴[1] Du Ruonan;Ren Yongfeng;Wang Shuqin(Key Laboratory of Instrumentation Science and Dynamic Testing,Ministry of Education,State Key Laboratory of Electronic Measurement Technology,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《电子测量技术》2021年第12期75-80,共6页Electronic Measurement Technology

基　　金：国家重点研发计划(2018YFF01010500)项目资助。

摘　　要：针对航天测试中数据经过较长电缆传输可靠性下降的问题,设计了一种基于FPGA高可靠性传输系统。传输系统硬件采用成都振芯国产芯片GM8223和GM8224,配合使用驱动器和均衡器,增加增强电路驱动能力;加入预加重设计,增强信号高频成分,补偿衰减。传输系统软件从发送端初始化、LVDS收发逻辑流、CRC+8B/10B双重编码方面说明高可靠性传输。初始化可以保证发送端发送有效数,CRC+8B/10B双重编码以牺牲带宽来减少误码率。实践验证,在传输速率240 Mbit/s长度为120 m同轴电缆上可以实现零误码率传输。In order to reduce the reliability of data transmission through long cable in aerospace test, a high reliability transmission system based on FPGA is designed. Transmission system hardware adopts Chengdu vibration core domestic chips GM8223 and GM8224, with the use of drivers and equalizers to increase and enhance the driving ability of the circuit. Preweight design is added to enhance the high frequency component of the signal and compensate attenuation. The software of the transmission system explains the high reliability transmission in terms of the initialization of the sender, LVDS transceiver logic flow, and CRC+8 B/10 B dual coding. Initialization can ensure that the sender sends a valid number, CRC+8 B/10 B dual encoding reduces bit error rate by sacrificing bandwidth. It has been verified by practice that zero bit error rate transmission can be achieved on the 240 Mbit/s coaxial cable with the length of 120 m.

关 键 词：高速远距离传输 CRC检错 LVDS接口 8B/10B编解码 低误码率 

分 类 号：TN710[电子电信—电路与系统]