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Diffusion affine projection sign algorithm for filtered-x active noise control

This paper proposes a diffusion filtered-x affine projection sign algorithm(DFxAPSA) for active noise control to improve robustness against impulsive noises and colored inputs. The proposed algorithm is obtained by minimizing the Li norm of a posterior error vector with constraint on adaptation update. The constraint prevents from dramatic change which is due to occurence of impulsive noises. Additionally, diffusion strategy is suitable to reduce the computational complexity by distributing computations of multichannel active noise control. With simulation results, the proposed algorithm shows better performance in the situation that inputs are correlated and impulsive noises occur.