Closed-form automatically paired 2-D direction-of-arrival estimation with arbitrary arrays

A new approach is proposed for two-dimensional (2-D) direction-of-arrival (DOA) estimation with arbitrary array geometries. The proposed method is based on array interpolation and it provides automatically paired source azimuth and elevation angle estimates. It is a fast algorithm and there is no need for search. In addition, the number of sensors required for such an operation is decreased due to array interpolation. Wiener array interpolation is used to improve the interpolation error. Proposed method is applied to the uniform circular array (UCA). Simulation results are presented and it is shown that the method is very effective with limited number of sensors.