强噪声背景下确定性谐波信号的模糊滤波

The Fuzzy Filter Approach to the Known Harmonic Signals Under the Background of Powerful Noises

文章提出了一种在强背景噪声环境下对被淹没的谐波信号进行模糊滤波,从而恢复微弱目标信号的方法。在MATLAB环境下,先利用相干平均法,除去被测信号中的随机白噪声,对于有色噪声运用自适应神经模糊推理系统(ANFIS)的方法,对被测信号进行模糊滤波。在较低信噪比下,能较好的恢复出原始微弱信号。

A new fuzzy filter approach to submerse d usef ul harmonic signal under the background of powerful noises is proposed in the paper,faint target signal is retrieved through this kind of filter.Under the environment of MATLAB,firstly,correlative evenness way is utilized to elimina te the stochastic noise in the mixed signals;About the colored noise,self Ada ptive Neural Fuzzy Illation System(ANFIS)approach is used to make fuzzy filter ing.Even in the condition of lower Signal-to-Noise Ratio(SNR),original fai nt target signals still can be retrieved.Simulation examples have shown its ef fectiveness.