一种新的DOA估计方法

摘要

本文提出了一种用天线阵来进行多个人射平面波的DOA(direction of arrival)估计方法.这种方法可以解决以往像MUSIC、ESPRIT等算法信号数不能超过阵元数的问题.这种方法计算量少、精度高、可适用于任意几何形状天线阵.同时得到信号频率估计,在平面阵中可得到自动成对的2维角估计.并且借助于相应技术,可对相关信号源的DOA进行估计.本文以均匀圆环天线阵(UCA)来估计多于阵元数的多个入射平面波空间2维角(俯仰角,方位角)为例进行仿真,最后给出计算机模拟结果证实该方法的实用性、有效性.%A novel estimation technique of DOA of multiple waves incident on antenna array is proposed in this paper. This technique can resolve the problem that the numter of signals cannot be more than the number of array elements that MUSIC and ESPRIT algorithms meet.With this technique,computational burden is reduced and accuracy is increased. It is suitable for antenna array of any geometry. At same time, signal frequency estimation is obtained and automatically paired 2-D estimation is also obtained for plane array. By use of responding techniques,estimating DOA of correlated signal sources is done. This paper takes an example of estimating 2-D angle (elevation and azimuth) of nmltiple plane waves of more than number of array elements incident on uniform circular array (UCA) and simulates. Finally, computer simulation result is given to confirm its practicability and effectiveness.