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.
