單脈沖雷達(dá)系統(tǒng)建模與欺騙干擾技術(shù)研究
[Abstract]:Monopulse radar (Monopulse radar) is a kind of precision angle-measuring radar, which has the advantages of high speed, high precision and strong anti-jamming ability. It has been widely used in military field. The research of angle deceptive jamming technology of monopulse radar has become a research focus in the field of radar electronic countermeasure. Based on the modeling and analysis of monopulse radar system, the angle deceptive jamming technology of monopulse radar is studied in this paper. The main contents are as follows: 1. Modeling and analysis of monopulse radar system. According to the theory of radar system simulation and the superiority of fractional Fourier transform (Fractional Fourier Transform,FRFT) in processing LFM signal, a radar signal processing unit based on FRFT is designed. A joint estimation algorithm of target parameters based on FRFT is proposed, and the simulation of monopulse radar system is realized. 2. The technique of monopulse angle deception jamming is studied. Based on the research of the traditional incoherent interference and coherent interference, the coherent interference and the reverse cross-eye interference in the multi-interference cooperative working scene are deeply analyzed. In this paper, the relative amplitude difference and the effect of echo on the jamming performance of the multi-jammers are studied in detail, including the interference time, the relative amplitude difference between the jammers and the effect of echo on the jamming performance. In this paper, the jamming performance of these jamming techniques is analyzed and compared by strict theoretical derivation and simulation experiments. 3. The design of monopulse radar jammer is studied. Based on the research of monopulse radar jamming technology, the design and implementation of angle deceptive jammer are studied in this paper. Firstly, a DRFM interference signal generation unit based on compressed sensing is proposed. The processing unit optimizes the traditional digital RF storage radio frequency by using compression sensing technology, which can generate interference signals with low sampling rate and data volume. Then, according to the principle of monopulse angle interference, two kinds of jamming devices, non-coherent angle drag jamming and airborne self-defense coherent interference, are proposed by using compressed sensing digital RF memory signal processing unit, and the jamming mode is designed. Finally, the jamming performance of two kinds of jammer is verified by simulation experiment.
【學(xué)位授予單位】:南京航空航天大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TN974
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