DEINTERLEAVING OF RADAR PULSES AND HARD WARE IMPLEMENTATION

Abstract

Electronic warfare (EW) is an important capability that can advance desired military, diplomatic, and economic objectives or, conversely, impede undesired ones. In a military application, EW provides the means to counter, in all battle phases, hostile actions that involve the electromagnetic (EM) spectrum from the beginning when enemy forces are mobilized for an attack, through to the final engagement. Deinterleaving of radar pulses, as an important part of a reconnaissance system, is a process of detection and recognition of different, simultaneous active, radar emitters. It assumes that received mixed pulses have to be sorted, and finally separated from each other depending on their specific radar emitters. Deinterleaving algorithms are based on the analysis of various parameters of the received radar pulses, such as time of arrival, pulse amplitude, pulse width and carrier frequency. However in this project we used ‗the interval only‘ algorithms which requires only the time of arrival information of radar pulses for deinterleaving. The objective of this project was to implement the most important deinterleaving algorithms using Time Only Analysis, already published, in matlab,the implementation of a fastest algorithm among devised and published on DSP. Ta histogram deinterleaving is a method in which we take nearly all the differences between all the pulses in a mixed signal and then form a histogram of it. Finally we compare the histogram values with some threshold to obtain the True PRI. A cumulative TOA difference histogram gives an indication of probable pulse repetition intervals (PRIs) with a minimum number of computations. Validation and identification is given by searching for a sequence of these pulse repetition intervals.