A novel method of deinterleaving radar pulse sequences based on a modified DBSCAN algorithm

Abstract

A modified DBSCAN algorithm is presented for deinterleaving of radar pulses in modern EW environments. A main characteristic of the proposed method is that using only time of arrival of pulses, the method can sort the pulses efficiently. Other PDW information such as rise time, carrier frequency, pulse width, modulation on pulse, fall time and direction of arrival are not required. To identify the valid PRIs in a set of interleaved pulses, an innovative modification of the DBSCAN algorithm is introduced which is accurate and easy to implement. The proposed method determines valid PRIs more accurately and neglects the spurious ones more efficiently as compared to the classical histogram based algorithms such as SDIF. Furthermore, without specifying any input parameter, the proposed method can deinterleave radar pulses while up to 30% jitter is present in the associated PRI. The accuracy and efficiency of the proposed method are verified by computer simulations and real data results. Experimental simulations are based on different real and operational scenarios where the presence of missing and spurious pulses are also considered. So, the simulation results can be of practical significance.