General radar pulse signal extraction method based on index differences

The invention discloses a general radar pulse signal extraction method based on index differences. The method comprises the steps of: setting a smallest pulse width Tp and a smallest pulse interval T[delta] which can be detected; obtaining an incoming signal noise threshold [gamma]0; extracting an index number sequence of incoming signal samples larger than [gamma]0 in amplitude, and recording the index number sequence as I1(n), wherein n=1, 2, ..., N, and N is the sample number of I1(n); carrying out difference processing on I1(n), extracting index numbers of the samples whose difference results are larger than the smallest pulse interval T[delta] as a preselected pulse rising edge; turning an input signal sequence S over, obtaining a sequence S', extracting an S' index number sequence larger than smallest pulse interval T[delta], and recording the S' index number sequence as I2(n'), wherein n'= n=1, 2, ..., N', and N'= N; carrying out difference processing on I2(n'), extracting index numbers of the samples whose difference results are larger than the smallest pulse interval T[delta], calculating the corresponding index numbers of signal sequence before the turning, and using the corresponding index numbers as a preselected pulse falling edge; forming preselected pulses by the rising edge and the falling edge; and removing the pulses whose widths are smaller than smallest pulse width from the preselected pulses, and obtaining the extracted pulses. By adopting the method, the rising edge and the falling edge of pulse signals in any modulation mode can be rapidly and effectively extracted.