High-order spectral analysis for micro-seismic signal

In this correspondence, on the basis of introduction of bispectrum analytic method, it is theoretically proved that this method can effectively eliminate white/colored Gaussian noise. To validate this, the micro-seismic signal resulting from wheeled and tracked vehicles is analyzed using bispectrum. The result of comparison with power spectrum analysis shows that bispectrum analysis is superior to power spectrum analysis in feature extraction, which agrees very well with the analytic result