Azimuth DOA estimation using an oval antenna array

Abstract

A new array design for azimuth direction of arrival (DOA) estimation is proposed in this work, termed as oval array. The structure of the proposed array replicates the oval shape on the x-y plane with the capability of two-dimensional (2D) DOA estimation. The advantage of the proposed array is that it offers less acquired area than the circular array for the same number of elements. Computer simulation is performed to evaluate the performance of the proposed array. DOA estimation results of the proposed array are then compared with circular array based on estimation resolution and error of estimation. Simulation results show that the proposed array improves the resolution of estimation of circular array by 50%. In addition, the proposed array also manages to reduce the estimation error of circular array by 75%. This work concludes that the proposed array offers an alternative design in array geometry with improved accuracy in DOA estimation.