高原,,
吴双
1.中国工程物理研究院应用电子学研究所 绵阳 621900
2.中国工程物理研究院复杂电磁环境科学与技术重点实验室 绵阳 621900
基金项目:中国工程物理研究院复杂电磁环境科学与技术重点实验室基金项目(FZSYS-02)
详细信息
作者简介:秦风：男，1985年生，副研究员，研究方向为电磁脉冲环境测试、电磁环境效应及防护
高原：男，1989年生，助理研究员，研究方向为电磁脉冲环境仿真与测试
吴双：男，1993年生，初级工，研究方向为电磁环境测试
通讯作者:高原 18142550916@163.com
中图分类号:O441.5; TM935.4计量
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被引次数:0
出版历程
收稿日期:2021-01-18
修回日期:2021-03-31
网络出版日期:2021-04-16
刊出日期:2021-08-10
Signal Compensation of Coaxial Cable Based on Modified Non-negative Tikhonov Regularization Method within Bayesian Inference
Feng QIN,Yuan GAO,,
Shuang WU
1. Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
2. Key Laboratory of Science and Technology on Complex Electromagnetic Environment, China Academy of Engineering Physics, Mianyang 621900, China
Funds:Foundation of Key Laboratory of Science and Technology on Complex Electromagnetic Environment, China Academy of Engineering Physics (FZSYS-02)
摘要
摘要:随着信号频率、带宽及传输距离的增大，信号在同轴电缆传输过程中的畸变问题变得越来越严重。特别地，如果同轴电缆在使用过程中还意外地遭受了挤压、拉伸或折叠，信号畸变问题将会变得更加严重。该文基于贝叶斯推理的非负Tikhonov正则化方法，提出一种改进的信号补偿方法。该方法可有效规避逆分析中的病态矩阵问题，利用同轴电缆的冲击响应函数，并结合输出端口的测量信号，即可实现输入信号的重构。并以长度15 m的受挤压同轴电缆为对象，采用此方法对3种不同样式的脉冲信号(双指数脉冲信号、调制方波信号、双极脉冲信号)进行了传输畸变补偿。结果表明：该方法均能实现优异的补偿效果，补偿后信号与输入信号间偏差远远低于传统的衰减补偿法。并且，该方法具有较强的鲁棒性，当信噪比大于30 dB时，即可保持好的稳定性。
关键词:信号补偿/
改进的非负Tikhonov正则化方法/
同轴电缆
Abstract:With the increase of signal frequency, bandwidth and transmission distance, the signal distortion problem brought by the coaxial cable becomes serious and can not be ignored. Specifically, if the coaxial cable is accidentally squeezed, stretched or folded during use, the signal distortion problem will become more serious. Herein, a modified signal compensation method is proposed based on the non-negative Tikhonov regularization method with Bayesian inference. This method can effectively avoid the ill-conditioned matrix problem in the inverse analysis. The input signal can be reconstructed by using impulse response function of coaxial cable and measured output signal. Three different types of pulse signals, i.e., double exponential pulse signal, modulated square wave signal, and bipolar pulse signal, transmitted in a 15 m extruded coaxial cable are compensated. The results show that this method can achieve excellent compensation effect, and the deviation between the compensated signal and the input signal is far lower than that of typical attenuation compensation method. Moreover, the modified method exhibits strong robustness. When the signal-to-noise ratio is larger than 30 dB, it can maintain good stability.
Key words:Signal compensation/
Modified non-negative Tikhonov regularization method/
Coaxial cable
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