基于SSC盲移频的NLFM雷达干扰技术研究

Research into Jamming Technology to NLFM Radar Based on SSC Blind Frequency Shift

非线性调频(NLFM)信号进行脉冲压缩后具有副瓣低且无信噪比损失的优点,在现代电子战中得到了广泛应用,常用移频干扰对此类雷达进行干扰。针对调频斜率捷变的雷达会使移频干扰信号的位置发生改变,使其失去干扰效果。提出了一种基于频谱扩展压缩(SSC)盲移频的NLFM雷达干扰技术。该技术在不需要测得NLFM调频曲线的情况下,通过控制SSC盲移频干扰的系统阶数和干扰机处理延时来实现精确位置的假目标干扰,并且假目标的位置不随NLFM信号参数的改变而改变。仿真结果表明,该技术能够实现对NLFM信号的欺骗干扰,具有很好的工程应用价值。

Non-linear frequency modulation(NLFM)signal has the advantages of low sidelobe and no loss of signal noise ratio(SNR)after pulse compression.It has been widely used in modern electronic warfare.Frequency shift jamming is often used to jam such radar.The radar with frequency modulation slope agility will make the position of frequency shift jamming signal change,resulting in losing of jamming effect.This paper presents a jamming technology to NLFM radar based on spectrum spread and compression(SSC)blind shift frequency.The technology can achieve the false target jamming in precise position by controlling the system order of SSC blind shift frequency jamming and the processing delay of the jammer without measuring the NLFM frequency modulation curve,and the position of the false target does not change with the change of NLFM signal parameters.The simulation results show that the technology can achieve the deception jamming to NLFM signal,and has good engineering application value.