基于圆阵的二维DOA估计新方法

A New Method of 2-D DOA Estimation based on Circle Array

通过分析圆阵阵列流形,提出一种新的圆阵二维谱估计模型,可以直接应用MUSIC算法进行二维DOA估计,从而避免了对圆阵输出信号进行模式激励。应用此模型仿真分析了均匀圆阵和均匀半圆阵的二维DOA估计性能,相比模式激励方法,减小了计算量;半圆阵与圆阵的DOA性能差别很小,但是半圆阵减少近一半的阵元数。

Based on the analysis of array manifold of Circular Array （CA）, a new 2-D spectrum estimation model for CA is presented in this paper, and there is no need to transform the manifold matrix of CA, so the MUSIC algorithm is directly used for the 2-D spectrum estimation of CA. The 2-D spectrum estimation parameters of UCA （Uniform Circular Array） and Semicircle Array （SCA） are analyzed by computer simulation in this model. Compared with mode excitation method, computation cost is reduced. There is little difference of estimation parameters between CA and SCA, but nearly half arrays of SCA are reduced.