Extraction method of wide-band phased array radar signals based on pulse amplitude characteristic

摘要

Wide-band phased array radar is the primary focus in electronic countermeasure reconnaissance, and prior extraction of such radar signals in the interleaved pulse data intercepted by the receiver has important military significance. Aiming at full pulse data intercepted by the receiver, a prior extraction method of wide-band phased array radar signals is proposed in this study. Utilising the electronic scanning feature of wide-band phased array radar, analyse the unchanging characteristic of pulse amplitude under the same working mode, and combine the pulse width characteristics of wideband pulse, a dichotomising reasoning algorithm in bioinformatics is introduced in this study. Firstly, reorder the full pulse data, filtrated by pulse width threshold, according to pulse amplitude; then, test the discontinuity points of pulse amplitude by employing the dichotomising reasoning algorithm, dividing the pulse sequences into segments with the same pulse amplitude; lastly, conduct pulse number threshold filtering on every segment, realising the extraction of wide-band phased array radar signals. The validity of this method has been verified by simulation experiments.