Blind adaptive beamforming based on generalized sidelobe canceller

The generalized sidelobe canceller (GSC) is an efficient implementation of the direction constrained adaptive array. Conventional GSC is designed acco rding to a quiescent weight vector and a blocking matrix. The quiescent wei ght vector provides the array with specified array response at some directi on. The blocking matrix is designed based on a priori knowledge of the dire ction of arrival (DOA) of the desired signal. In this paper, we propose a n ew GSC-based adaptive array without a priori knowledge of the DOA of the de sired signal. This paper utilizes eigensubspace decomposition and statistic ally cyclostationary properties of the signals to design the adaptive array . A method for constructing the most efficient blocking matrix for the GSC is developed. Simulation examples illustrate the effectiveness of the propo sed method. (C) 2000 Elsevier Science B.V. All rights reserved.