基于盲源分离的多域联合抗主瓣欺骗式干扰

Multi-domain Combination Anti-mainlobe Deception Jamming Based on Blind Source Separation

主瓣欺骗式干扰增加了雷达对真实目标的检测难度,是雷达抗干扰领域的研究重点。文中就一种空域-极化域-多脉冲域联合的盲源分离算法进行了研究。该算法以特征矩阵联合对角化(Joint Approximate Diagonalization of Eigen-Matrices,JADE)盲源分离算法为基础,利用空域-极化域的角度相位差和多脉冲域的多普勒频率相位差分离出目标和干扰。首先,利用多个阵元的空域信息和极化域信息构建正交极化通道;然后,利用不同脉冲间目标和干扰径向速度差带来的多普勒频率差构建三域联合接收阵列;最后,将三域维度构造的数据作为盲源分离的输入,分离出目标信号和欺骗式干扰。计算机仿真验证,该算法可以在干扰完全淹没目标信号时,利用任意一个维度产生的差异成功分离出目标和干扰信号。

The mainlobe deception jamming greatly increases the difficulty of radar detection of real targets,which is the focus of radar anti-jamming research.An algorithm is proposed based on blind source separation in space-polarization-multi-pulse collaborative to resist mainlobe deception jamming.The algorithm uses the angle phase difference in spatial and polarization domain and Doppler frequency shift difference in multi-pulse domain based on joint approximate diagonalization of eigen-matrices(JADE)blind source separation to separate targets and jamming.Firstly,the orthogonal polarization array is constructed by adopting the spatial and polarization domain information of multiple array elements.Then,a three-domain joint receiver array is constructed using the Doppler frequency shift difference caused by the target and jamming radial velocity difference between different pulses.Finally,the data constructed from three-domain dimensions is applied as the input of blind source separation to separate target signal and jamming.Simulation results show that the proposed algorithm can realize effective separation when the target and deception jamming are different in any of the three dimensions.