1. Deconvolution method of irregular pulse repetition time sampled signal x(t m ) wherein it comprises the following steps: &lsqb;S 1 &rsqb; conversion of the irregular samples x(t m ) to regular samples r(iT &egr; ); &lsqb;S 2 &rsqb; computation of the spectrum dft(r) of these regular samples; &lsqb;S 3 &rsqb; isolation of the clutter spectra in dft(r) by assuming clutter spreads over more than a few range gates; &lsqb;S 4 &rsqb; estimation of the clutter spectral lines from the mean and the width of the isolated clutter spectra; &lsqb;S 5 &rsqb; subtraction of the estimated clutter spectra from the total spectrum dft(r); &lsqb;S 6 &rsqb; deconvolution of the remaining spectra.