Direction of arrival estimation with unknown number of signal sources

Abstract

A new problem, estimation of the direction of arrival (DOA) without knowing (or assuming) the number of signal sources, is addressed. The authors propose a method which is related to both the multiple signal classification (MUSIC) and Capon's methods. The performance of the proposed method when the number of signal sources is unknown is shown to be almost the same as that of the MUSIC method when the number of signal sources is exactly known.<>