基于小波谱相关方法的相位编码信号参数估计

Parameter Estimation of MPSK Signal Based on Wavelet Spectral Correlation

提出了一种针对淹没在噪声中MPSK信号参数估计的小波域谱相关方法。依据循环谱相关与仿射类时频分析的相关理论,把小波谱推广到了小波谱相关域,提出了小波域谱相关方法,分析了MPSK信号的小波域谱相关的特征。根据分析的结果,给出了MPSK参数估计的小波域谱相关方法的步骤,并进行了仿真计算。结果表明,该方法具有在低信噪比情况下检测MPSK信号的良好性能。

A wavelet domain spectral correlation method was proposed to detect MPSK signal overwhelmed in noise. Based on cyclic spec- tral correlation and affine time-frequency theory, wavelet spectral was expanded to wavelet spectral correlation domain and MPSK signal wavelet domain spectral correlation characteristic was analyzed. According to results of the analysis, steps of MPSK parameter estimation were proved. The simulation results show this method has good performance of detection in Low SNR.