基于脉冲切片编码的反欺骗干扰波形设计

Waveform Design against Deception Interference Based on Pulse Slice Coding

基于数字射频存储的转发式欺骗干扰技术逐渐成熟,而传统的对抗措施尚显不足。基于波形分集原理,文中提出了一种脉冲切片编码的波形设计方法。首先,对发射的线性调频信号进行切片编码;在接收处理时,根据编码规则解码,通过判断解码后接收信号与发射信号的相关性大小,区分出干扰信号。仿真结果表明:文中设计的波形解码后经匹配滤波满足互相关函数峰值与自相关函数峰值差值大于3 dB的分析准则,能够有效抑制转发式欺骗干扰。

With the development of reradiating spoofing technology based on digital radio frequency memory,traditional electronic counter countermeasures cannot meet requirements.According to waveform diverse theory,a new design method of waveform based on pulse slice coding is proposed in this paper.First,liner frequency modulation signals are sliced and coded before transmitting.Then the correlation is analyzed between echo signals and transmitting signals after decoding to distinguish interference.The simulation results show that the waveforms meet the analysis standard that difference value between cross-correlation function peak and auto-correlation function peak is greater than 3 dB after decoding and matched filtering,which can suppress reradiating spoofing effectively.