A cumulant based DOA estimation for S-CDMA with decorrelator in spatial colored noise

The conventional direction of arrival (DOA) detection algorithm is generally based on the second-order spectrum estimation while assuming that the noise is additive white Gaussian noise (AWGN). Concentrating on spatially colored noise of unknown spectrum quality, which is more realistic in any scenario, a novel high-order cumulant MUSIC DOA estimation algorithm for synchronous CDMA system with decorrelator as been proposed. The proposed algorithm not only has the advantages that the DOA of multipath signals can he estimated independently by eliminating all the other resolvable multipath signal interference but while on spatially colored noise case the proposed algorithm estimates DOAs of the decoupled multipath signal more effectively and accurately than the conventional second-order MUSIC algorithm.