基于辅助阵元的二维波达方向估计算法  

2-D DOA Estimation Algorithm Based on Auxiliary Sensor

作　　者：邓键敏[1] 吴瑛[1] 

机构地区：[1]信息工程大学信息工程学院,郑州450002

出　　处：《数据采集与处理》2011年第3期269-274,共6页Journal of Data Acquisition and Processing

摘　　要：针对任意平面阵列,提出了一种基于辅助阵元的二维波达方向估计算法。首先利用附加的一个辅助阵元及信号的空、时域信息,构造时空旋转矩阵实现对仰角的分离估计,再利用得到的仰角信息通过一维搜索获取方位角。与传统基于子空间的二维波达方向估计算法相比,该方法不需要进行二维谱峰搜索与参数配对,对阵元的幅相误差具有较强的鲁棒性,并具有较高的角度分辨力,对阵元的利用率高,且能够应用于任意结构的平面阵。最后,计算机仿真结果验证了算法的有效性。Based on auxiliary sensor,a 2-D DOA estimation algorithm is proposed for arbitrary planar array.By adding an auxiliary sensor and exploiting information of source in space-time domain,the space-time rotational matrix is formed to estimate elevation in advance.Thereby,the azimuth can be obtained by 1D search using the information of estimated elevation.Compared with the traditional 2-D DOA algorithm based on subspace,the algorithm does not require 2D searching and pair matching.It has high angular resolving ability,good robustness to the amplitude and phase error of sensor gain,and a high sensor utilization rate,and can be applied to arbitrary planar arrays.Simulation results show the validity of the algorithm.

关 键 词：阵列信号处理 二维波达方向估计 空时处理 辅助阵元 

分 类 号：TN911.7[电子电信—通信与信息系统]