基于NC-MUSIC算法的均匀圆阵DOA估计及性能分析

DOA estimation of UCA based on NC-MUSIC algorithm and performance analysis

近年来基于非圆信号的DOA估计算法由于其优良的估计性能,受到越来越多的关注。在接收阵列为均匀圆阵的情况下,对入射信号进行方位角和俯仰角的联合估计。依据非圆信号的DOA估计数学模型及阵列模型,采用NC-MUSIC算法完成对均匀圆阵方位角和俯仰角的联合估计。通过计算机仿真,得出该算法对均匀圆阵方位角和俯仰角的估计是比较准确的,并且通过NC-MUSIC与MUSIC算法仿真性能的分析比较,得出在接收阵列为均匀圆阵的情况下,NC-MUSIC算法也优于MUSIC。

Recently the DOA estimation algorithm based on noncircular signals has attracted more and more attentions owing to its excellent estimation performance.This paper mainly illustrates that the direction of incident signal is jointly estimated by azimuth and elevation when the received arrays are uniform circular arrays.According to the mathematic model for DOA estimation and arrays model,it mainly uses NC-MUSIC algorithm for azimuth and elevation joint estimation of UCA in the paper.By the computer simulation,the results have proved that this algorithm for azimuth and elevation joint estimation of uniform circular array is significantly exact,and when the received arrays are uniform circular arrays,NC-MUSIC algorithm is better than MUSIC algorithm by the contrast of NC-MUSIC algorithm and MUSIC algorithm.