Radar Anti-chaff-jamming Technology Research

Chaff is a passive electronic countermeasures interference equipment, it is a veryimportant role in the passive interference. Because Chaff create simple, easy to use,fast production, the technology is mature and interference effects, etc., commonlychaff jamming to interfere with the anti-ship missile terminal guidance radar.it is avery effective passive jamming measures.For the modern terminal guidance radar, The use of the chaff spectrum broadeningfeatures to eliminate the chaff jamming is a very effective anti-jamming measures.According to the chaff cloud is subjected to the influence of wind and gravity in thediffusion process.The Doppler broadening effect of chaff cloud is much larger thanthe ship,We discussed the way of chaff jamming that based the difference ofDoppler broadening.The radar echo signal by using the pulse pressure processing, coherentaccumulation, and constant false alarm handling。So,as to achieve the purpose ofspectrum broadening effect of anti-chaff jamming. The validity of the method is proveby a large number of experimental data.Finally, the combination of a terminal guidance radar in the sea trial data and themeasured data of the ship. Its frequency domain processing and analysis of resultsshowed that: the method based on the chaff spectrum broadening effect of anti-chaffjamming very simple and effective.