频分MIMO雷达密集假目标与真实目标信号相关性研究

A Study on Signals Correlation between Dense False Targets and Real Target of Frequency Division MIMO Radar

频分MIMO雷达波束指向与距离和角度均相关,使得干扰机释放的密集假目标信号包含干扰机真实距离和角度信息,文中结合调制的假目标速度信息,在推导出真假目标相关系数的基础上,对真假目标信号相关性进行了研究。理论及仿真结果表明,在一定条件下,密集假目标与真实目标信号的相关性会减弱,特别是在自卫式干扰情况下密集假目标与真实目标径向速度稍有不同,相关性就会急剧下降。该文对频分MIMO雷达抑制有源干扰具有一定的积极作用。

The dense false target signals released by the jammer contain the real distance and angle information of the jammer, because the beam direction of the frequency division MIMO radar is related to the distance and angle. Combining the modulated speed information of false targets, the correlation between true and false target signals is studied based on the derivation of the correlation coefficients between true and false targets. Theoretical and simulation results show that under certain conditions, the correlation between dense false targets and real target signals will be weakened. Especially in the case of self-defense jamming, the radial velocity of the dense false target is slightly different from radial velocity of the real targets, the correlation will drop sharply, which has a certain positive effect on the suppression of active jamming by frequency division MIMO radar.