Abstract:Consider the detection of coherently related narrowband signals in the presence of noise. In this paper we define non-stationary higher order spectra (HOS) and develop nonparametric estimators of the first two non-stationary HOS, the non-stationary power spectrum and non-stationary bispectrum. The finite sample and asymptotic statistics of these estimators are presented and used to compare their detection performance to the stationary power spectrum for the case just mentioned. Detection performance is quantif… Show more
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