SHI Qian1, LI Zhi-zhong2
（1. Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China)， Ministry of Education, Taiyuan 030051， China； 2. Beijing Institute of Space Long March Vchicle, Beijing 100076, China）
Abstract： In order to ensure the reliability and accuracy of low voltage differential signaling (LVDS) used in remote test system serial data transmission, a (7,4) linear block code is proposed. At the expense of a certain effective bandwidth, the bit error rate of data transmission is greatly reduced, and the reliability of data transmission is improved by adding monitoring symbols. The driver CLC001 and the adaptive equalizer CLC012 are used as hardwares to compensate the attenuation of the signal in the long line transmission, improve the signal integrity and ensure the reliability of data transmission. Proved by simulation on a shielded twisted pair cable with a total length of 100 m, this system realizes zero bit error transmission of the serial data at the rate of 240 Mbit/s.
Key words： low voltage differential signalingm (LVDS) interface; remote test system; (7,4) linear block code
CLD number： TP919.6 Document code： A
Article ID： 1674-8042（2018）02-0109-06 doi： 10.3969/j.issn.1674-8042.2018.02.002
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一种提高LVDS可靠性通信方法的研究
史谦1， 李智中2
（1. 中北大学 仪器科学与动态测试教育部重点实验室， 山西 太原 030051； 2. 北京航天长征飞行器研究所， 北京 100076）
摘要:为保证远程测试系统中基于低振幅差分信号技术(low voltage differential signaling, LVDS)串行数据传输的可靠性与准确性， 提出了一种(7,4)线性分组码。 该方法以牺牲一定有效带宽为代价， 通过对线上传输的有效数据增加监督码元极大地降低了数据传输的误码率， 提高了数据传输的可靠性。 采用驱动器CLC001和自适应均衡器CLC012补偿信号在长线传输中的衰减， 提高了信号的完整性， 保证了数据传输的可靠性。 经仿真验证， 在总长为100 m的屏蔽双绞线上， 该系统以240 Mbit/s的码率实现了串行数据的零误码率传输。
关键词:LVDS接口； 远程测试系统； (7,4)线性分组码
引用格式：SHI Qian, LI Zhi-zhong. A method for improving reliability communication of LVDS. Journal of Measurement Science and Instrumentation, 2018, 9(2)： 109-114. ［doi： 10.3969／j.issn.1674-8042.2018.02.002］
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