一般阵列误差情况下信号二维方向角估计

Estimation of 2D angle for signals with general array error

针对均匀圆阵存在一般阵列误差的情况,提出一种信号二维方向角估计方法。基于均匀圆阵的阵列流形和阵列输出的协方差矩阵,采用加权总体最小二乘法估计信号二维方向角。并给出了解整周期性模糊的方法。计算机仿真表明了此方法估计精度高,对阵列误差鲁棒性强,并且各项性能都接近于CRB。

For general array error in a uniform circular array （UCA）, a scheme of estimation of azimuth and elevation for source is proposed in this paper. Based on direct array manifold in UCA and the covariance matrix of array output, the azimuth and elevation is estimated by weight total least squares technique, and a method to disambiguate the cyclic phase ambiguities is also presented. Numerical results show that the estimator bears high precision, good robust to general array error and the performance close to the CRB.