Acoustic source direction-of-arrival estimation using circular sensor array in modal space based on compressive beamforming

In this paper, a new circular array Direction-Of- Arrival (DOA) estimation approach is developed, which can improve spatial resolution by imposing penalties based on the $l_{1}$ -norm. Our approach differs from most previous methods mainly in how it applies the compressive beamforming technique to the modal array signal processing in order to achieve better DOA estimation performance. Computer simulation with two closely spaced coherent sources scenario indicates the superior DOA estimation resolution of our proposed approach as compared with the conventional beamforming technique.