Patent ID: 7969360
Filing Date: 2011-06-28
Classification: G01S

Abstract:
1. A method of identifying directions of arrival from a plurality of radiation sources to an antenna array having N antennas (N being an integer) by a processor using an estimator of circular cumulants of a predetermined even-order (2q, q being an integer equal to or greater than 2), the method comprising: receiving signals by the N antennas and arranging the received signals into a plurality of sampled vectors x(t), “t” being the index denoting different sampled vector; calculating an estimated cumulant matrix Ĉ decomposing the estimated matrix Ĉ calculating an estimated pseudo-spectrum {circumflex over (P)} a(θ,φ) being a matrix comprising directional vectors of the radiation sources; and identifying the directions of arrival of the radiation sources according to local minimums of the pseudo-spectrum {circumflex over (P)}