基于脉冲分集理论的雷达波形数字水印抗DRFM干扰技术

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

数字射频存储(Digital Radio Frequency Memory,DRFM)欺骗式干扰的发展越来越成熟,然而,相应的抗干扰技术效果尚显不足。本文基于脉冲分集理论提出了一种抗数字存储欺骗式干扰的方法,首先利用不同的随机数对发射信号脉冲包络进行编码调制;接收处理时,根据编码规则,通过判断回波与发射信号携带的随机数是否相同,从而识别真假回波,进一步进行抗干扰处理,最终达到抑制干扰的目的。仿真结果并与典型的调频率捷变的方法进行比较。仿真结果表明,新算法的抗干扰性能较典型的调频率捷变的算法有明显提升。

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.