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提出了一种基于双谱相位加幅值滤波的脉冲星信号消噪方法.首先将含噪脉冲星信号变换到双谱域,利用α-删减相位滤波器对其双谱相位进行平滑滤波,并且设计了幅值α-删减加权中值平均滤波器对其双谱幅值进行滤波处理,然后再根据滤波后的双谱值来重构信号的功率谱和相位.仿真结果表明,重构的信号不仅可以消除高斯噪声,而且还对非高斯噪声进行了有效地滤波,比直接双谱重构和仅对双谱相位进行处理重构的效果都要好.
A method of canceling the pulsar signal based on bispectrum phase plus amplitude filter is proposed.Firstly, the noisy pulsar signal is transformed into the bispectral domain and its bispectrum phase is smoothed using the α-cutoff phase filter, And the amplitude α-cutoff weighted median averaging filter is designed to filter the bispectral amplitude, and then the power spectrum and phase of the signal are reconstructed according to the filtered bispectrum values. The simulation results show that the reconstruction Signal can not only eliminate Gaussian noise, but also filter non-Gaussian noise effectively, which is better than direct bispectrum reconstruction and bispectrum phase reconstruction.