Radar Interference Technology Research Based On The High Repetition Frequency Ultra-wide-band Pulse

With the continuous improvement of radar system and signal processing technology, the matched receiving technology and the low probability of intercept technology have been extensively used in modern radar system, combined with the wide application of netted radar, modern radar’s ability of anti-jamming is becoming stronger and stronger, making it difficult to interfere the radar effectively with the traditional ways.This dissertation mainly studies the interference technology of high repetition frequency ultra-wide-band pulse. Research on the interference effect against pulse compression radar receiver based on the time-frequency feature of high repetition frequency ultra-wide-band pulse, providing theoretical and technical support for the application of high repetition frequency ultra-wide-band pulse in radar jamming technology. Contents of this dissertation are as follows:First of all, based on the transient response and the steady-state model of pulse compression radar receiver, this dissertation studies the interference response of high repetition frequency ultra-wide-band pulse jams the analog front-end, intermediate frequency receiver, signal and data processor; besides, this dissertation studies the interference effect of high repetition frequency ultra-wide-band pulse jams the modern radar’s interference measures, such as frequency agility, pulse compression, pulse accumulation and CFAR detection.Secondly, based on the interference response, this dissertation builds the theoretical model of the relationship between pulse parameters and signal to interference plus noise ratio of the radar receiver, and suggests the design of optimum interference pulse width and repetition frequency.Finally, this dissertation researches the situation of multiple jammers interference pulse compression radar, discusses the coordination of the interference pattern and distribution, and then suggests the optimum distribution pattern through the analysis of the cooperative interference effect.Through the theoretical analysis and numerical simulation, we come to the conclusions that compared with the radio frequency noise, the high repetition frequency ultra-wide-band pulse can get better jamming effect on pulse compression radar receiver. What’s more, the pulse parameters and the way of cooperative work show a significant impact on the interference effect. Therefore, in practical application, it is necessary to choose the optimum interference pulse parameters and the optimum way of cooperative work according to the actual interference scene and target.