Direction of Arrival Estimation Algorithm: Direction Lock Loop

Abstract

In this paper, a new direction of arrival (DOA) estimation algorithm, direction lock loop (DiLL), is proposed. It has a similar concept to the delay lock loop (DLL) that is used for synchronization. It estimates the DOA of a signal by iterations, and can track the DOA of a moving source. The DiLL scheme is found to track better than the DOA estimation scheme based on the PASTd, and its performance is less sensitive to the DOA of a signal than that of the DOA estimation scheme based on the PASTd. The DOA estimation accuracy and the tracking capability are demonstrated by analysis and computer simulations.