关键词: 信息处理技术, 二维方向角估计, 最小二乘法, 均匀圆阵, 模糊性

Abstract: Based on uniform circular arrays (UCAs), a high-precision estimation of 2D direction angle for multiple sources is proposed. First, exploiting information of source in 2D space-time domain forms the space-time rotational matrix, so that the multiple sources are separated. Second, based on a direct array manifold in UCA, the azimuth and elevation are estimated by Least Squares (LS). Finally, the removal method of cyclic ambiguity is presented. Numerical results show that the advantages of estimator are high precision and robustness to amplitude and phase error of sensor gain.

Key words: information processing technique, estimation of 2D direction angles, LS, UCAs, ambiguity