A line spectrum extraction method of seismic-acoustic signal

This paper puts forward a line spectrum extraction method of seismic-acoustic signal. The method is based on the difference in the polarization characteristics between signal and noise. The data of two horizontal channels are analyzed and the frequency domain polarization parameters are extracted by using singular value decomposition (SVD) method. The resolution of the polarization to frequency is improved by using multi-layer autocorrelation. Experimental results show that the polarization method can extract line spectrum adaptively, and the method based on multi-layer autocorrelation has a good line spectrum extraction performance. The signal to noise ratio (SNR) of the spectrum has been greatly improved.