Alternating Iterative Adaptive Approach for DOA Estimation via Acoustic Vector Sensor Array Under Directivity Bias

In this letter, an alternating iterative adaptive approach (AIAA) for direction of arrival (DOA) estimation via acoustic vector sensor (AVS) array under directivity bias is proposed. Firstly, the directivity bias parameter is introduced into the signal model. An AIAA is then developed to estimate the sparse signal and the directivity bias matrix iteratively. In each iteration, in order to eliminate the effect of directivity bias, the directivity bias matrix reconstruction method based on the inherent directivity of AVS is presented. Simulation results show that the proposed method effectively improves the accuracy of DOA estimation compared with other state-of-the-art methods.