An Automatic Pairing Method for 2-D Direction of Arrival Estimation

A low complexity and high resolution estimation method for two dimensional(2-D) direction of arrival of far-field narrowband signals for an L-shaped array is presented in this paper.By making use of the cross-correlation matrix and the L-shaped array geometry,the effect of the additive noise is eliminated.The proposed method only needs 1-D estimation for joint azimuth and elevation angle estimation by eigenvalue decomposition(EVD) of a low dimension matrix,which can reduce the computational burden.What's more,the elevation angles are estimated by the eigenvalues,and the corresponding azimuth angles are estimated through the use of the virtual array response matrix constructed by the corresponding eigenvectors.The effectiveness of the proposed method is verified through computer simulations,and it is shown that the proposed method performs well in the situation of low SNR,small snapshots,and little angular separation.