Distributed Wave-Domain Active Noise Control Based on the Diffusion Strategy

Conducting the spatial active noise control (ANC) in wave-domain has been shown advantageous over conventional point-based methods. In the existing schemes, signals at all error microphones are collected and processed in a centralized manner to update the secondary source driving signals. The high computational complexity of this centralized strategy represents one of the major challenges for applying multi-channel ANC systems in large-scale applications. In order to address this issue, this work presents a distributed wave-domain ANC scheme by resorting to distributed optimization techniques. The global ANC problem is formulated as a sum of local costs, and the diffusion adaptation strategy is subsequently utilized to provide a distributed solution that only requires local information exchanges. Simulation results show that the proposed algorithm achieves sufficiently good performance compared to its centralized counterpart.