Alternating fixed-point algorithm for stereophonic acoustic echo cancellation - Vision, Image and Signal Processing, IEE Proceedings-

A novel algorithm for use in stereophonic acoustic echo cancellation is introduced. The alternating fixed-point structure of the algorithm descends each of the channels alternatively and avoids nonuniqueness in the solutions by employing interand intra-channel orthogonal projections. For a noisy environment, the algorithm is shown to provide improved misalignment performance and echo cancellation over leading competitors at a low computational cost. The inherent noise robustness is uncovered using H" estimation techniques and noise-error bounds are derived.