Low cost DOA estimation for wideband sources

This paper presents a temporal method for direction of arrival (DOA) estimation for wideband sources by using an antenna array. Existing DOA estimation algorithms treat the problem in frequency domain by decomposing the wide spectrum of these signals in several narrowband signals, and use a narrowband DOA estimation methods to solve the problem. These methods suffer from high computational complexity. This paper introduces a temporal method based on cross-correlation functions between sensors outputs. The estimation of the propagation delays is the key to find directions of arrival of wideband sources. The method has low cost complexity in terms of computations and sensors number. In this paper we describe the method and we do some comparative simulations to show the performance of the suggested method.