A Novel Method of Deinterleaving Radar Pulse Sequences Based on a Modified DBSCAN Algorithm

A modified DBSCAN algorithm is pre-sented for deinterleaving of radar pulses in modern EW environments. A main characteristic of the pro-posed 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 fre-quency, 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 innova-tive modification of the DBSCAN algorithm is intro-duced which is accurate and easy to implement. The proposed method determines valid PRIs more accu-rately and neglects the spurious ones more efficiently as compared to the classical histogram based algo-rithms such as SDIF. Furthermore, without specifying any input parameter, the proposed method can dein-terleave 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 simula-tions 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.