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阵元互耦的存在会使双基地MIMO雷达多目标定位算法的性能恶化.利用发射和接收互耦矩阵的带状、对称Toeplitz性质,提出了一种基于ESPRIT的双基地MIMO雷达收发角度算法,并针对现有参数配对算法中存在参量兼并的问题,给出了一种改进的自动配对算法.仿真结果表明:在存有相同发射角/接收角时,本文算法仍能有效实现多目标定位,无需进行谱峰搜索和额外的目标配对;本文算法对互耦系数自由度和扰动误差的稳健性优于MUSIC-like算法,并且具有更高的估计精度.此外,还推导了确定信号模型下收发角和互耦系数的CRB(Cramer-Rao bound).
The mutual coupling of array elements will deteriorate the performance of bistatic MIMO radar multi-target localization algorithm.Based on the strip and symmetric Toeplitz properties of the mutual coupling matrix of transmitting and receiving, an algorithm based on ESPRIT for transmitting and receiving bistatic MIMO radar is proposed, In order to solve the problem of parameter annexation in existing parameter matching algorithm, an improved auto-matching algorithm is proposed. The simulation results show that the proposed algorithm can still achieve multi-target positioning effectively when the same transmitting angle / receiving angle exists, No spectral peak search and additional target pairing are needed. The proposed algorithm is superior to MUSIC-like algorithm in robustness to DOF and perturbation of mutual coupling coefficients and has higher estimation accuracy. In addition, CRB (Cramer-Rao bound) of angle and mutual coupling coefficient.