Deinterleaving pulse trains in unconventional circumstances using multiple hypothesis tracking algorithm

Authors:
Jingyao Liu;Huadong Meng;Yimin Liu;Xiqin Wang
Affiliations:
Department of Electronic Engineering, Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua University, Beijing 100084, PR China;Department of Electronic Engineering, Tsinghua University, Beijing 100084, PR China
Venue:
Signal Processing
Year:
2010

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Abstract

The main function of Electronic Support Measure (ESM) is to receive, measure and deinterleave pulses, and then identify alternative threat emitters. Among these processes, pulse deinterleaving is vitally important because dense electromagnetic environments could cause an ESM system to receive a seemingly random pulse stream consisting of interleaved pulse trains with high noise levels. Only when we segregate different radar pulse trains from the pulse stream can we proceed with further processing. Traditional deinterleaving algorithms have demonstrated instability in unconventional circumstances (such as agility of pulse repetition interval (PRI), large noise and jitter, missing of intercepted pulses). Based on the dynamic process of different emitters, a new Statistical Association Pulse Deinterleaving (SAPD) approach is proposed based on the Multiple Hypothesis Tracking (MHT) algorithm in Multiple Target Tracking system. Simulation results have shown that the proposed algorithm can successfully identify pulse trains with constant, jittered and staggered PRI, and provide much greater accuracy in PRI estimation and pulse classification than traditional algorithms, with the presence of large noise, frequency jitter, and many missing pulses.