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基于LVDS传输可靠性优化设计
2022年电子技术应用第1期
杜凯旋1,焦新泉1,2,杨志文1,李辉景1
1.中北大学 电子测试技术国家重点实验室,山西 太原030051; 2.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
摘要: 针对LVDS传输初始化建链过程中出现的首帧丢失和干扰导致的误建链问题,对链路传输机理及稳定性进行分析,并从硬件与软件两方面进行优化。软件上采取识别帧头和发送训练帧的方法,改善建链过程;硬件上选用性能更好的隔离芯片,优化差分端阻抗,减小干扰对数据传输的影响。经多次试验证明,优化后的链路可实现480 Mb/s速率下的可靠传输,该优化设计对提高LVDS链路传输稳定性和减少误码方面具有很好的参考价值。
中图分类号: TN919
文献标识码: A
DOI:10.16157/j.issn.0258-7998.211811
中文引用格式: 杜凯旋,焦新泉,杨志文,等. 基于LVDS传输可靠性优化设计[J].电子技术应用,2022,48(1):105-108,114.
英文引用格式: Du Kaixuan,Jiao Xinquan,Yang Zhiwen,et al. Optimized design based on LVDS transmission reliability[J]. Application of Electronic Technique,2022,48(1):105-108,114.
Optimized design based on LVDS transmission reliability
Du Kaixuan1,Jiao Xinquan1,2,Yang Zhiwen1,Li Huijing1
1.State Key Laboratory of Electronic Tecchnology,North University of China,Taiyuan 030051,China; 2.Key Laboratory of Instrument Science and Dynamic Testing(Ministry of Education), North University of China,Taiyuan 030051,China
Abstract: Aiming at the problem of the first frame loss and the mis-establishment of the link caused by the interference during the initial link establishment of LVDS transmission, this paper analyzes the link transmission mechanism and stability, and optimizes it from both hardware and software aspects. The software adopts the method of identifying the frame header and sending the training frame to improve the link building process. The hardware chooses a better performance electriciacl isolation chip and optimizes the differential terminal impedance to reduce the impact of interference on data transmission. Many tests have proved that the optimized link can achieve reliable transmission at a rate of 480 Mb/s. This optimized design has a good reference value for improving the transmission stability of the LVDS link and reducing errors.
Key words : LVDS;link establishment;training frame;electrical isolation

0 引言

    随着电子技术与通信技术的迅猛发展,高速率高帧频的数据为并行传输带来巨大挑战,面对高速并行传输带来的偏移和干扰问题[1],低电压差分信号(LOW-Voltage Differential Signaling,LVDS)凭借高速率、低功耗以及抗共模干扰性好等优点,广泛应用于军事、科研、工业等各领域的数据传输通信[2]

    针对LVDS通信建链过程中出现的丢帧及误码现象,为了进一步提高LVDS传输链路的可靠性,本文对LVDS传输链路硬件物理层和软件链路层进行研究,提出相应的优化措施并加以验证[3]。实际测试链路传输稳定,可有效解决丢帧和误码问题。




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作者信息:

杜凯旋1,焦新泉1,2,杨志文1,李辉景1

(1.中北大学 电子测试技术国家重点实验室,山西 太原030051;

2.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)




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