Research of signal processing system for antijamming based on multifrequency spread spectrum and hopping spectrum

A chirp radar system usually adopts antijamming techniques by spread spectrum close to the monochromic frequency so that the guidance radar has the ability for anti-active-jamming and anti-passive-jamming, anti-reconnaissance, anti-antiradiation missile, and anti-stealth capabilities. This technique cannot meet the needs of modern electronic countermeasures. This paper provides a new method in which multifrequency spread spectrum and hopping spectrum are used instead of monofrequency spread spectrum, and introduces a corresponding matched filter system