CAJ | 학술논문

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。
침대강맥충전자간우능량대、규률성불강，대신호오염엄중，제출료일충려파신방법。의거신호화맥충전자간우결구적불동，구조료단위맥충원자필배맥충전자간우，선택정현원자、여현원자화소파원자필배유용신호。불동우상규희소분해려파적사로，본문수선장맥충전자간우간작신호성분，사용상술원자이용정교필배추종진행분해。연후，부선택정현원자、여현원자화소파원자필배적성분작위무조신호，병장단위맥충원자필배적성분작위간우려제。방진실험화실례응용증명，해방법능구유효억제강맥충전자간우화백조성，불부신조비고，이차보류료세절。
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.