对抗MIMO雷达的低截获干扰信号设计

Low probability of intercept jamming signal design for MIMO radar

研究MIMO雷达的干扰信号设计方法,在保证对雷达的信干噪比小于雷达可检测目标门限的前提下,最小化干扰信号的功率,从而使干扰信号难以被截获,有效节省了干扰资源。通过分析MIMO雷达信号模型,假设MIMO雷达采用非匹配滤波器对干扰和噪声进行抑制,推导了MIMO雷达输出信干噪比的表达式,将其作为干扰信号设计的约束条件,最小化干扰信号总功率,得到了干扰信号功率优化分配的方法。仿真结果表明,相比较于未进行干扰功率优化设计的干扰信号,在达到相同信干噪比的情况下,此方法可以有效降低干扰总功率。

Jamming signal design for MIMO radar is considered.Based on the aim of low probability of intercept and saving the jamming resource,the total jamming power is minimized which simutaneously ensures that the signal-to-interference-plus-noise ratio（SINR）for MIMO radar is lower than the desired SINR threshold for MIMO radar target detection.MIMO radar signal model is analyzed under the assumption that mismatched filter is used to resisit the jamming and noise.The receiver output SINR for MIMO radar is obtained and used as the jamming signal design constraint.Together with the objective function of minimizing the jamming power,the jamming signal optimization problem is obtained.Simulation results illustrate that the total jamming power can be effectively reduced compared with other equal-SINR jamming signal.