A new GSC beamforming algorithm based on double affine projection
Zehua Liu, Shouhao Wu, Yongjie Wang, Wenxiu Guo, Jie Zhang · 2014
In generalized sidelobe canceller beamforming (GSC) algorithm, the blocking matrix Alters out the desired signal in order to pass the interference signal and noise. In this paper, we propose a DAP-GSC beamforming algorithm based on double affine projection (DAP) algorithm to restrain the desired signal, when the blocking matrix (BM) can't cancel the desired signal completely. We add a Normalize Least Mean Square (NLMS) filter between the blocking matrix (BM) and the adaptive noise cancellation (ANC). With sound source position error or array error, this method can achieve high SNR with a small number of microphones.