The Constant False Alarm Rate Detectio And Data Processing Of Outer Transmitter-based Radar System

The passive radar based on outer transmitters is a new system radar. Not radiating electromagnetic wave and using other outer electromagnetic wave to detect objects, this system radar is not easy to be detected by electronic scouting system, and has abilities of ECCM (Electronic Counter-Countermeasure), AARM(Anti Anti-Radiation Missile) and anti-stealthy targets. But in this system radar, the very strong direct arrival wave and multi-path signal of the receiver device, as its character, will affect the detection of object very badly, and this character will reduce the detection probability of object and increase the probability of false alarm. So the constant false alarm rate (CFAR) detection and data processing of the outer transmitter-based radar system are especially important.At first the thesis discussed how to use the cell average(CA) CFAR detection technique to decrease the probability of false alarm,and then studied the realization of each part of this system radar'data processing, such as gate filter, track start, the association of point and track, the point supplement for track, track filter and prediction, track show and deletion. At last, the tracks of flying targets were drawn according to the practically sampled datas. The practical radar system was working steadily and effectively and it proved that the method researched in this thesis was logical and effective.In order to accelerate the processing of this system radar, C programming language, based on Matlab, was used in the thesis to realize the CFAR detection and data processing of the outer transmitter-based radar system.