基于LVDS的高可靠性长线传输设计
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摘要
针对高速数据远距离传输时可靠性低的问题,提出了一种基于LVDS的高可靠性长线传输系统。采用电流环传输指令,增强其抗干扰能力,并在逻辑上设计了双重计数消抖的防指令误判技术;重点介绍了一种简单、易实现的10B/6B向前纠错编码,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,大大降低了数据传输的误码率。经实践验证,在总长119 m,由多级低频电连接器连接的屏蔽双绞线上,该系统实现了418 Mbit/s码率串行数据的零误码率传输。
In viewed of the low reliability in the high-speed and long distance data transmission,the design of longdistance transmission system with high reliability was put forward based on LVDS interface. The current loop signal transmission methods increased anti-jamming capability of command,and the dithering elimination technology of double counter prevented instruction misjudgment. It is mainly introduced about 10 B/6 B on-line coding mechanism of FEC which was easy to implement at the cost of sacrifice on valid bandwidth,and increased of monitor code to encoded the valid data on line,the bit error rate is greatly decreased and the realization of data transmission increased.By the practical test,the LVDS serial data at the rate of 418 Mbit/s could realize zero bit error rate transmission in119 m shielded twisted-pair with lots of low-frequency connectors.
In viewed of the low reliability in the high-speed and long distance data transmission,the design of longdistance transmission system with high reliability was put forward based on LVDS interface. The current loop signal transmission methods increased anti-jamming capability of command,and the dithering elimination technology of double counter prevented instruction misjudgment. It is mainly introduced about 10 B/6 B on-line coding mechanism of FEC which was easy to implement at the cost of sacrifice on valid bandwidth,and increased of monitor code to encoded the valid data on line,the bit error rate is greatly decreased and the realization of data transmission increased.By the practical test,the LVDS serial data at the rate of 418 Mbit/s could realize zero bit error rate transmission in119 m shielded twisted-pair with lots of low-frequency connectors.
引文
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[5]郭柳柳,储成君,甄国涌,等.基于PXI总线高速数据传输卡的设计[J].计算机测量与控制,2014;22(6):1899-1901.
[6]李辉景,王淑琴,任勇峰,等.基于CRC校验的高速长线LVDS传输设计[J].电子器件,2015;38(6):1346-1351.
[7]任勇峰,彭巧君,刘占峰,等.基于FPGA的CPCI高速读数接口设计[J].电子器件,2015,38(1):148-151.
[8]甄国涌,瞿林,刘东海.基于LVDS技术的远程数据传输延展卡的设计[J].电子技术应用,2014;40(8):44-47.
[2]郭宝锋,韩壮志,何强.基于FPGA的高速数据长线传输系统的设计[J].测控技术,2012;31(5):85-88.
[3]戴萧嫣,王立恒,李圣昆,等.基于LVDS的长线传输模块设计[J].通信技术,2009,11(42):4-5.
[4]姚永兴,焦新泉,马培娇.高可靠性远程数据传输系统设计[J].计算机测量与控制,2011;19(8):1968-1971.
[5]郭柳柳,储成君,甄国涌,等.基于PXI总线高速数据传输卡的设计[J].计算机测量与控制,2014;22(6):1899-1901.
[6]李辉景,王淑琴,任勇峰,等.基于CRC校验的高速长线LVDS传输设计[J].电子器件,2015;38(6):1346-1351.
[7]任勇峰,彭巧君,刘占峰,等.基于FPGA的CPCI高速读数接口设计[J].电子器件,2015,38(1):148-151.
[8]甄国涌,瞿林,刘东海.基于LVDS技术的远程数据传输延展卡的设计[J].电子技术应用,2014;40(8):44-47.