四阶累积量的MIMO雷达角度估计算法

摘要

A new algorithm based on fourth order cumulants is proposed for angle estimation for MIMO radar in the presence of the spatially Gaussian noise,which constructs a cumulant matrix using the data vectors of radar.Through the eigenvalue decomposition of the matrix,angles of MIMO radar can be estimated combining with the subspace kind algorithms such as MUSIC and ESPRIT.This algorithm,keeping the capacity of virtual array extending and target distinguish,removing data redundancy of cumulant matrix and reducing the complexity,restrains automatically the influence of the Gaussian noise and will be more available in practice.Simulation results verify that the proposed algorithm is effective.%针对色噪声环境下的MIMO雷达目标角度估计问题,提出一种新的参数估计算法.通过计算MIMO雷达接收数据的四阶累积量,并对构造出的累积量矩阵进行特征分解,结合MUSIC算法和ESPRIT算法实现了雷达目标的角度估计.在保证阵元扩展能力和目标分辨力的基础上进行了低复杂度改进,去掉了冗余信息,实现了目标参数的有效估计；同时由于采用四阶累积量,提高了算法抑制高斯噪声的能力,更利于工程应用.最后计算机仿真结果证实了算法的有效性和可行性.