The Use of Partial Update Schemes to Reduce Inter-channel Coherence in Adaptive Stereophonic Acoustic Echo Cancellation
نویسندگان
چکیده
The use of partial update adaptive filters for stereophonic acoustic echo cancellation is investigated. The MMax-NLMS algorithm is studied in this context and its inherent robustness to subsampling of the tap-input vector is demonstrated. It is proposed to employ the subsampling of the tap input vector, that is intrinsic to partial update schemes, to decorrelate the two tap-input vectors of the stereo adaptive structure thereby enhancing convergence. We investigate the trade-off between improvement in convergence due to decorrelation of the two tap-input vectors and degradation in convergence due to subsampling in the MMax-NLMS partial update scheme. The exclusive MMax-NLMS (XM-NLMS) is proposed which approximates the joint optimization of these factors and simulation results are presented.
منابع مشابه
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