Stereo Acoustic Echo Cancellation Using MIMO Decorrelation Network Based NLMS Adaptive Filter
Subject Areas : electrical and computer engineering
M.
Bekrani
1
(Tarbiat Modares University)
M.
Lotfizad
2
(Tarbiat Modares University)
Keywords: Misalignment adaptive filter convergence rate decorrelation,
Abstract :
Existence of a high inter-channel correlation in a stereo communication system results in a considerable performance degradation in the associated stereo acoustic echo canceller and also weight misalignment of adaptive filters even after finalizing the convergence period. In this paper an approach for improving the performance of NLMS adaptive filter is developed based on reducing the correlation of input signals employing a multi-input-multi-output decorrelation network. This approach has a low-complexity neural network structure and can train in a real-time manner. Simulation results show an improvement in weight convergence rate and misalignment employing the proposed method.
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