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.<<ETX>>