用均匀中心对称阵二维西ESPRIT方法实现闭环形式二维角估计

本文提出了适用于一类均匀中心对称阵的二维西ESPRIT方法,它是一种闭环形式的高分辨算法,对信号源方位角和仰角估计实现自动配对.在算法最后阶段构造一个矩阵,其第I个特征值的实部和虚部分别与第I个信号源相对X轴和Y轴的方向余波一一对应.该算法除了初始变换和最后矩阵特征分解外,整个过程都采用高效的实值计算.并推广应用于DFT波束空间,可在较小的空间维数上处理,从而减小计算复杂性.最后对算法做了一阶近似渐进性能分析.仿真结果说明了算法是有效的.

Closed-Form 2-D Angle Estimation via 2-D Unitary ESPRIT with Uniform Centro-Symmetric Array

A kind of2-D Unitary ESPRIT method is proposed for use in conjunction with a uniformcentro-symmetric array (UCSA).It is a new closed-form high resolution algorithm to provideautomatically paired source azimuth and elevation estimates.In the final stage of thealgorithm,the real and imaginary parts of the ith eigenvalue of a matrix are one-to-onerelated to the respective direction cosines of the ith source relative to the x and yaxes.Except for the initial transition and the final eigenvalue decomposition of dimensionequal to the number of sources,it is efficiently formulated in terms of real-valuedcomputation throughout It can operate in a reduced dimension in DFT beamspace,and reducecomputational complexity.The asymptotic performance of the algorithm ispresented.Simulation results are presented verifying the efficacy of the method.