IRREGULAR PRT DECONVOLUTION METHOD AND SYSTEMS, AND ITS USES

This invention relates to radar signal processing. In particular, this invention concerns Doppler processing and clutter filtering on irregular Pulse Repetition Time (PRT) sampled signal.This invention solves the above-mentioned drawbacks, in particular solving the velocity ambiguity and filtering any type of clutter, providing a deconvolution method which filter any kind of clutter even varying clutter like sea clutter, rain clutter . . .The deconvolution method of irregular pulse repetition time sampled signal x(tm), comprises the following steps:[S1] conversion of the irregular samples x(tm) to regular samples r(iT&egr;);[S2] computation of the spectrum dft(r) of these regular samples;[S3] isolation of the clutter spectra in dft(r) by assuming clutter spreads over more than a few range gates;[S4] estimation of the clutter spectral lines from the mean and the width of the isolated clutter spectra;[S5] subtraction of the estimated clutter spectra from the total spectrum dft(r);[S6] deconvolution of the remaining spectra.