Multi-Microphone Noise Reduction Technique based on Upsampling and IIR-RLS Filter

In this paper, a multi-microphone technique that uses upsampling and IIR-RLS filter to achieve noise reduction in speech degraded by additive noise in the reverberant environment is proposed. One of the main unique features of the proposed technique is that it does not require any statistics about the desired signal. In addition, it does not rely on voice activity detection (VAD), thus avoids the performance degradation due to effects of speech detection errors which are permanent with GSC technique. The good performance of the proposed multi-microphone technique over GSC technique for additive noise reduction has been verified via computer simulations.