基于LVDS的数据传输系统优化  

Optimization of data transmission system based on LVDS

作　　者：宿家豪 焦新泉[1] 杨志文 李少茜 周江 SU Jiahao;JIAO Xinquan;YANG Zhiwen;LI Shaoxi;ZHOU Jiang(Key Laboratory of Instrumentation Science and Dynamic Testing of Ministry of Education,North University of China,Taiyuan 030051,China;7th Military Representative Office of Firewear in Beijing Area,Beijing 100076,China)

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051 [2]火装驻北京地区第七军事代表室,北京100076

出　　处：《集成电路与嵌入式系统》2025年第5期45-51,共7页Integrated Circuits and Embedded Systems

摘　　要：网络时代数据量激增,对数据传输技术提出了更高的要求,特别是在传输速度、稳定性和可靠性方面。传统的单通道LVDS数据传输系统在长距离传输时,其传输速率往往只有几百Mb/s,难以满足数据高速传输的要求。因此,本文提出了一个综合性优化方案:在硬件方面采用两组四通道LVDS芯片作为数据的高速接口,实现了八通道LVDS传输,提高了数据的传输速率,但是速率提升的同时,在串扰和电磁干扰作用下产生误码的概率也在增大,因此需要配合LVDS专用的数据驱动器和电缆均衡器系统的抗干扰能力和长距离传输能力。另外,在软件逻辑中引入RS编解码技术,实现了在一定范围内的纠错,配合自动重传技术和CRC校验提高了数据传输的可靠性。经过多次试验,该设计最终可以实现在80 m双绞线屏蔽电缆下4000 Mb/s的零误码传输。With the rapid increase of data volume in today's era,higher requirements are put forward for data transmission technology,especially in terms of transmission speed,stability and reliability.Traditional single channel LVDS data transmission system generally achieve transmission rates of only a few hundred Mb/s when transmitting over long distances,which is insufficient for high-speed data transmission needs.To address this challenge,this paper proposes a comprehensive optimization scheme.In terms of hardware,two groups of four channel LVDS chips are used as the high-speed data interface,enabling eight channel LVDS transmission and thereby improving the data transmission rate.However,as the rate increases,the probability of error code generation due to crosstalk and electromagnetic interference also increases.Therefore,it is necessary to cooperate with the anti-interference ability and long-distance transmission ability of dedicated LVDS data driver and cable equalizer system.In addition,RS encoding and decoding technology is introduced into the software logic to achieve error correction within a certain range.With automatic retransmission technology and CRC verification,the reliability of data transmission is improved.After extensive tests,the proposed design can finally achieve 4000 Mb/s zero error transmission under 80 m twisted pair shielded cable.

关 键 词：LVDS RS编码 CRC校验 自动重传请求 多通道LVDS传输 

分 类 号：TN919[电子电信—通信与信息系统]