ESTIMATION OF 2-DIMENSIONAL DOA UNDER A DISTRIBUTED SOURCE MODEL AND SOME SIMULATION RESULTS

Most research on the estimation of direction of arrival (DOA) has been performed based on the assumption that the signal sources are point s ources. In some real surroundings, signal source localization can more adequately be accomplished with distributed source models. When the s ignal sources are distributed over an area, we cannot directly use wel l-known DOA estimation methods, because these methods are established based on the point source assumption. In this paper, we propose a 3-di mensional distributed signal source model, in which a source is repres ented by two parameters, the center angle and degree of dispersion. Th en, we address the estimation of the elevation and azimuth angles of d istributed sources based on the parametric distributed source modeling in the 3-dimensional space.