The Study on the Technology of Airborne Radar Anti-jamming
|Course||Communication and Information System|
|Keywords||radar jamming anti-jamming signal processing target tracking|
Radar has been widely equipped in modern national defense and wars, and its performance was usually limited by the property of its radiation space. As the electromagnetic environment becomes more complicated, more and more attentions are drawn to the jamming problems of the airborne radar, therefore various kinds of anti-jamming measures were brought up.This paper was based on the development of the airborne radar signal processor. Firstly it introduced the basic model of radar countermeasures and its characteristic parameters. Start points of anti-jamming technology were raised when it came to the research of the components of radar system. According to the characteristics of radar jamming, each jamming type was stated separately.Secondly, some commonly used anti-jamming signal processing technologies such as pulse compression, moving target detection(MTD), constant false alarm rate(CFAR), adaptive frequency hopping and pseudo random frequency hopping were presented. Beside those above, further researches were made as follows, for example, side-lobe suppression of pulse compression, the simulation of MTD and CFAR based on real data, the design of adaptive frequency hopping module and the improved algorithm of pseudo random code generation.Finally, it described the hardware platform based on TS201 and DSP software development Tool Visual DSP++. Monopulse phase comparison theory was discussed as well. Besides, the realization of single target tracking in practice was given, which included the data stream, the control flow and the specific method of phase compensation of sum and difference channels. As to range deception, the criterion was discussed. After the analysis of special processing of edge tracking method, the simulation on DSP was achieved in the lab.