Analysis of Frequency Domain Characteristics of Crosstalk for Train Network Control Communication Cable

Proceedings of the 5th International Conference on Computer Science and Application Engineering Pub Date : 2021-10-19 DOI:10.1145/3487075.3487180

Yang Liu, Changxiang Li, Bozhen Ma

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引用次数: 1

Abstract

Aiming at crosstalk problem of communication cable in train network control, mechanism of crosstalk generation is analyzed based on multi-conductor transmission lines (MTL) theory, and calculation method of distributed parameter of shielding cable in homogeneous dielectric is given. Frequency domain method of generalized two-port network is used. Frequency domain solution of the coupling response in the cable terminal is derived by solving shielded twisted pair (STP) chain-parameter matrix. Finally, influence factors of crosstalk is simulated. The results show that crosstalk is inversely proportional to the distance between lines and is directly proportional to the height from the ground and the coupling length, and the amplitude of variation increases significantly when the frequency is greater than 80MHz. For shielding layer, double-end grounding has the strongest anti interference ability. Single-end grounding has a significant inhibitory effect on low frequency interference, but has limited suppression of high-frequency interference. Double-end floating has a worse anti interference effect.

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列车网络控制通信电缆串扰频域特性分析

针对列车网络控制中通信电缆的串扰问题，基于多导体传输线(MTL)理论分析了串扰产生的机理，给出了均匀介质中屏蔽电缆分布参数的计算方法。采用广义双端口网络的频域方法。通过求解屏蔽双绞线(STP)链参数矩阵，推导出电缆终端耦合响应的频域解。最后，对影响串扰的因素进行了仿真。结果表明，串扰与线距成反比，与离地高度和耦合长度成正比，且当频率大于80MHz时，串扰变化幅度显著增大。对于屏蔽层，双端接地具有最强的抗干扰能力。单端接地对低频干扰有明显的抑制作用，但对高频干扰的抑制作用有限。双端浮动的抗干扰效果较差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 5th International Conference on Computer Science and Application Engineering

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