CRLS-GSC Noise Reduction Algorithm Robust to DOA Mismatch Problem in Microphone Arrays

In this paper, using a group of derivative constraints in the generalized sidelobe canceller (GSC) structure, the constraint recursive least squares-generalized side-lobe canceller (CRLS-GSC) algorithm is introduced for noise reduction application. Through computer simulations, it is observed that the proposed CRLSGSC algorithm is less sensitive to direction of arrival (DOA) mismatch problem, which often degrades the noise reduction performance in the commonly-used GSC algorithm. It also presents a better performance with respect to the previous algorithms including multi-channel Wiener filtering (MWF), GSC, and GSC with noise sensitivity constraint (GSC-NSC) in terms of robustness to different noise scenarios.