基于降维子空间重构的双基地MIMO雷达角度估计算法

摘要

According to the principles and echo model of the bistatic MIMO (multiple-input multiple-output) radar,a novel angle estimation algorithm of departure direction and arrival direction based on reduced-dimension subspace reconstruction is proposed.The algorithm that only requires one-dimension search can avoid the high computational cost within the two-dimension Music (2D-Music) algorithm and needs fewer training samples.By means of Monte Carlo simulations,the estimation variance on different SNR,snapshots and array elements are simulated.Simulations are consistent with the theoretical analysis and verify the usefulness of the algorithm.%根据双基地MIMO雷达的工作原理和回波模型,结合阵列信号处理,提出了降维子空间重构的角度估计算法,并给出了算法有效性证明.理论分析表明,该算法可以有效解决二维空间搜索计算成本高,矩阵运算量大和低快拍数下算法适应性差的问题,并通过蒙特卡罗实验对不同信噪比、快拍数和接收阵元数等情况下角度估计的方差进行了仿真,证实了理论分析的正确性.