Research On Anti-jamming Technology Of Mmw-radar

As a variety of new jamming technologies continue to emerge on the battlefield,the anti-jamming ability of radar is demanded higher and higher in modern wars. Against the threat of kinds of complex jamming techniques, it is the effective anti-jamming measures taken in time that make the party stay in a good situation. Own to its wide bandwidth,narrow beam and anti-jamming ability, Millimeter-wave radars are more and more popular in modern electronic wars.The thesis first analyzes the performance of millimeter-wave radar as well as its disadvantage, and then introduces the anti-jamming technologies of Millimeter-wave radar in waveform selection,space selection,frequency selection and in the power domain etc. In specific circumstances, the choice of anti-jamming technology is very targeted. A wide range of integrated use of anti-jamming technologies can often achieve better results.As the pulse compression technique is used widely now, the performance of anti-jamming of pulse compression in Millimeter-wave radar is studied in this thesis. And the study shows that it is difficult to form an effective jamming for ordinary jamming techniques to pulse-compression radar, but shift-frequency jamming can form a false target interference. Integrated with the shift-frequency jamming, the thesis analyzes corresponding anti-jamming measures, including adjusting the signal bandwidth appropriately and anti-jamming algorithm based on Independent Component Analysis (ICA). The simulation results prove its effectiveness.In addition, in view of the wide application of monopulse angle measurement in guidance,tracking and imaging, the performance in anti-jamming of monopulse angle measurement is also studied in the thesis. Moreover, narrow beam of Millimeter-wave radar is further conducive to improving measurement accuracy and ability of anti-jamming. Starting with the principle of monopulse angle measurement, the thesis analyzes the impact of noise on angle measurement. Then the method of ICA is applied in the de-noising. Actually, MMW-radar Active Decoy is an efficient way against monopulse radar and widely used now, in the end, we study the technological advantages of Millimeter wave / infrared composite system, and discuss the effectiveness of its interfering with such a jamming.