基于正交匹配追踪的强脉冲电磁干扰滤波新方法  

A new denoising method for strong pulse electromagnetic interference signals based on orthogonal matching pursuit

作　　者：朱会杰[1] 王新晴[1] 芮挺[1] 赵洋[1] 李艳峰[1] 

机构地区：[1]解放军理工大学野战工程学院,南京210007

出　　处：《振动与冲击》2015年第15期33-37,共5页Journal of Vibration and Shock

基　　金：国家科技重大专项子课题(2011ZX05056)资助项目

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。Because strong pulse electromagnetic interferences（ PEMIs） have a high energy and a weak regularity,and they pollute signals seriously,a new denoising method to solve this problem was proposed. According to different structures of signals and PEMIs,a unit pulse atom was constructed to match PEMI,and sine atom,cosine atom and wavelet atom were chosen to match signal. Unlike common filtering ways of sparse decomposition,PEMI was firstly taken as a signal component,and all the atoms mentioned above were used to decompose the original signal. Secondly,only the components matched by sine atom,cosine atom and wavelet atom were used to reconstruct the unpolluted signal,and the component matched by the unit pulse atom was eliminated as PEMI. Simulations and applications testified that this technology can be used to filter strong PEMIs,the filtered signals not only have a high signal to noise ratio,but also retain details.

关 键 词：正交匹配追踪 滤波 脉冲电磁干扰 多原子 

分 类 号：TN911.4[电子电信—通信与信息系统]