Coherent noise jamming to de-chirping radar

Repeater jamming has become an important jamming type for countering coherent radar since it is proposed. In this paper, a coherent noise jamming method based on interrupted-sampling and pseudo-random sequence phase-modulation is proposed against de-chirping radar. The characteristic of jamming signal is analyzed in detail and the processing procedure of de-chirping radar is introduced. After De-chirping, multiple dense false-targets are formed to protect the true target. Compared with non-coherent noise jamming, this jamming signal is of much correlation with radar signal and capable of obtaining processing gain. At last, some simulation results are presented to validate the correctness and effectiveness of the jamming method. With the ability of adapting to different radar signals and the simple structure to be realized, this jamming idea shows some significance to engineering implementation of jammer.