Intrapulse Minute Features' Analysis Of Radar Signals In The ELINT System

Intrapulse minute features' analysis of pulse signals is important part of the ELINT System and ESM System, and is the sign of the level of the ECM technology. Because of the analysis, we can acquire the parameter of the enemy's devises exactly, and can spy and disturb them effectively.The question for discussion in this paper is the several kinds of ordinary radar signals, which include sinusoid signals, linear FM signals, BPSK signals, QPSK signals and their parameter, which include impulse width, impulse amplitude, arrival time, frequency, phase, modulate slope, code length. Firstly, as existing arithmetic can't analyse effectively for all the signals, the research chose a parallel processing: after recognition the signal type, the research chose different methods to deal with different signals. Secondly, the thesis does research between theses signals, and finds that there are three types signals which can change into sinusoid signal, the other important point in this paper is frequency estimation of sinusoid, because the other kinds of signals' parameter estimation can use the sinusoid's method. Otherwise, the thesis chooses appropriate method to estimate other parameters.In order to prove the effectiveness of the arithmetic, the thesis does a lot of simulation with MATLAB and designs data aquisition board based on USB technology, which used for validating the arithmetic. The experiment show that the arithmetic is effective and the result can provide precious technology parameter for the next processing.