基于正交匹配追踪的强脉冲电磁干扰滤波新方法

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摘要针对强脉冲电磁干扰能量大、规律性不强，对信号污染严重，提出了一种滤波新方法。依据信号和脉冲电磁干扰结构的不同，构造了单位脉冲原子匹配脉冲电磁干扰，选择正弦原子、余弦原子和小波原子匹配有用信号。不同于常规稀疏分解滤波的思路，本文首先将脉冲电磁干扰看作信号成分，使用上述原子利用正交匹配追踪进行分解。然后，仅选择正弦原子、余弦原子和小波原子匹配的成分作为无噪信号，并将单位脉冲原子匹配的成分作为干扰滤除。仿真实验和实例应用证明，该方法能够有效抑制强脉冲电磁干扰和白噪声，不仅信噪比高，而且保留了细节。

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关键词 ：正交匹配追踪, 滤波, 脉冲电磁干扰, 多原子

Abstract：

Because strong pulse electromagnetic interference (PEMI) has high energy and no regularity, and it pollutes signals seriously, we proposed a new denoising method to solve this problem. According to the different structure between signal and PEMI, the unit pulse atom was constructed to match PEMI, and the sine atom, cosine atom and wavelet atom were chosen to match signal. Unlike common filtering ways of sparse decomposition, the PEMI was firstly taken as signal component, and all the atoms above were used to decompose the original signal. Second, only the component matched by sine atom, cosine atom and wavelet atom was used to reconstruct the unpolluted signal, and the component matched by unit pulse atom was eliminated as PEMI. Simulations and applications testified that this technology could filter strong PEMI, the filtered signal not only has high signal to noise ratio, but also retain details.

Key words： orthogonal matching pursuit denoise pulse electromagnetic interference multi atoms

收稿日期: 2014-02-26 出版日期: 2015-08-15

引用本文:

朱会杰 1，王新晴 1，芮挺1，赵洋 1，李艳峰 1. 基于正交匹配追踪的强脉冲电磁干扰滤波新方法[J]. 振动与冲击, 2015, 34(15): 33-37.
ZHU Hui-jie 1 WANG Xin-qing 1 RUI Ting1 ZHAO Yang 1 LI Yan-feng 1. A New Denoising Method for Strong Pulse Electromagnetic Interference Signals Based on Orthogonal Matching Pursuit. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(15): 33-37.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I15/33

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