基于盲源分离技术的列车电磁辐射现场测量方法  

A New Method of On-Site Measurement of Train Radiated Emission Based on Blind Source Separation

作　　者：刘冬 Liu Dong(Institute of Basic Technology,CRSC Research&Design Institute Group Co.,Ltd.,Beijing 100070,China;Engineering Research Center of Railway Industry on Electromagnetic Environment Effects and Electromagnetic Safety,CRSC Research&Design Institute Group Co.,Ltd.,Beijing 100070,China)

机构地区：[1]北京全路通信信号研究设计院集团有限公司基础技术研究院,北京100070 [2]北京全路通信信号研究设计院集团有限公司电磁环境效应及电磁安全铁路行业工程研究中心,北京100070

出　　处：《铁道技术标准（中英文）》2024年第10期12-17,共6页Railway Technical Standard(Chinese & English)

摘　　要：针对现场辐射发射测试时背景噪声影响测量准确性的问题,提出一种列车电磁辐射现场测量的新方法。此方法基于源信号的统计独立性和非高斯性假设,通过盲源分离技术,处理接收到的多通道混合数据,来实现在现场复杂噪声环境下提取受试设备有效辐射值的目的。基于最小二乘法,推导混合信号和估计信号的最佳拟合系数,改进传统盲源分离算法处理后的数据丢失了幅度信息的不足。经仿真验证,该方法能够有效削弱外界电磁干扰的影响,提高现场测量的准确度,对保证列车安全运营具有重大意义。This paper presents a new method of on-site measurement of train radiated emission.This method is based on Blind Source Separation(BSS)where the prior knowledge of the source signals and transmission channels are unknown.By processing the received multi-channel mixed data,the source signals can be extracted only via two hypothetical conditions(statistical independence and non-Gaussianity)in the complex electromagnetic environment under the influence of background noise and interference signal.It has been verified by the simulation that this method can effectively reduce the influence of external interference and improve the accuracy of the measurement which is of great value to ensure the safe operation of train.

关 键 词：辐射现场测量 盲源分离 快速ICA 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]