基于LVDS的数据传输系统优化

宿家豪, 焦新泉, 杨志文, 李少茜, 周江

集成电路与嵌入式系统 ›› 0

集成电路与嵌入式系统 ›› 0 DOI: 10.20193/j.ices2097-4191.2025.0003

基于LVDS的数据传输系统优化

  • 宿家豪, 焦新泉, 杨志文, 李少茜, 周江
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Optimization of data transmission system based on LVDS

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摘要

当今时代数据量的激增,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Mbps,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80m双绞线屏蔽电缆下4000Mb/s的零误码传输。

Abstract

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. When the traditional single channel LVDS data transmission system transmits for a long distance, its transmission rate is often only a few hundred Mbps, which is difficult to meet the requirements of high-speed data transmission. Therefore, this paper proposes a comprehensive optimization scheme: in terms of hardware, two groups of four channel LVDS chips are used as the high-speed interface of data, which realizes eight channel LVDS transmission and improves the data transmission rate; However, as the rate increases, the probability of error code generation under the effect of crosstalk and electromagnetic interference also increases. Therefore, it is necessary to cooperate with the anti-interference ability and long-distance transmission ability of LVDS dedicated 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 many tests, the design can finally achieve 4000mb/s zero error transmission under 80m twisted pair shielded cable.

关键词

LVDS / RS编码 / 高速传输 / 可靠性传输 / 系统优化

Key words

LVDS / RS code / High speed transmission / Reliable transmission / system optimization

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导出引用
宿家豪, 焦新泉, 杨志文, 李少茜, 周江. 基于LVDS的数据传输系统优化[J]. 集成电路与嵌入式系统, 0 https://doi.org/10.20193/j.ices2097-4191.2025.0003
Optimization of data transmission system based on LVDS[J]. Integrated Circuits and Embedded Systems, 0 https://doi.org/10.20193/j.ices2097-4191.2025.0003

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