基于移频滤波的脉压雷达抗干扰方法

针对线性调频（LFM）脉冲压缩雷达易受移频欺骗干扰影响的问题，提出了基于移频检测的起始频率捷变LFM雷达抗干扰方法。通过分析匹配滤波器参考函数、目标回波信号和干扰信号在频域的相对位置，利用脉间LFM信号起始频率不同的特点，将接收信号进行移频，使得目标回波信号分量无脉压输出，从而确定干扰信号分量在时域的位置，通过时域选通对未进行移频的接收信号脉压结果中的干扰进行滤除达到抗干扰目的。仿真分析了移频检测抗干扰性能，结果验证了所提方法的有效性。

Jamming suppression of pulse compression radar based on frequency-shifting filter

To solve the problem that linear frequency modulation (LFM) pulse compression radar can be affected by the frequency-shifting jamming,a jamming suppression method for initial frequency agility LFM radar based on frequency-shifting detection is presented. The relative position among matched filter reference function,target echo signal and jamming signal in frequency domain is analyzed,and then the character that the initial frequency among interpulse LFM signal is different can be used. The target echo signal is made to have no pulse compression output through shifting the received signal frequency. So the jamming signal can be identified and suppressed. The anti-jamming performance of the proposed method is analyzed through simulation and the result proves its effectiveness.