Approach of Radar Waveform Digital Watermark Against DRFM Jamming Based on Waveform Pulse Diversity Theory

With the development of cheating interfere in Digital Radio Frequency Memory (DRFM)，the shortage and poor performance of anti-jamming technology are more and more obvious. This paper introduces a new anti DRFM jamming technology based on pulse diverse theory. Every transmit signal is embed with different random number in pulse signal envelop. The random numbers are matched in echo signal and signal transmitted by DRFM to recognize the true echo and complete the anti-interference processing. Finally achieve the purpose of inhibiting interference. The simulation results are compared with the chirp rate polarity jittered, the simulation results show that the performance of the new algorithm is significantly improved compared with the typical chirp rate polarity jittered.