Detection of narrowband signals by Gabor´s expansion of spectrum

Suppression of clutter interference in target detection is studied. Gabor´s expansion is applied to the detection of narrowband signals under the interference of wideband colored noise. After the power spectrum of a signal is found, this expansion is performed on the spectrum. The width W of Gabor´s window function is treated as a regularization parameter. Signals with spectral width larger than W are expanded to be DC components in the expansion coefficients. Thus wideband signals or noise can be suppressed, and this results in a robust prewhitening filter