波束形成器辅助声回波消除器联合优化GSC实现的统计分析

M. H. Maruo, J. Bermudez, L. Resende
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引用次数: 0

摘要

波束形成器辅助的回声消除器最近引起了人们的极大兴趣。当波束形成器(BF)进行空间抵消时,缩短长度的回声消除器(AEC)可以获得相同的性能。为了发挥协同效应,优选联合优化BF和AEC系数的结构。对于使用约束最小均方(CLMS)算法的这种系统的直接形式实现的行为,已经推导出了分析模型。这项工作将分析扩展到流行的广义副瓣抵消(GSC)结构,同时允许一个正定的步长矩阵。推导了自适应系数的均方行为和均方行为的解析模型。仿真结果与理论预测的性能非常吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Statistical analysis of jointly-optimized GSC implementations of beamformer-assisted acoustic echo cancelers
Beamformer-assisted acoustic echo cancelers have raised a lot of interest lately. The same performance can be obtained with a reduced length acoustic echo canceler (AEC) as the beamformer (BF) performs spatial cancellation. Structures that jointly optimize the BF and the AEC coefficients are preferred in order to exploit synergies. Analytical models have been already derived for the behavior of the direct form implementation of such systems adapted using the constrained least-mean square (CLMS) algorithm. This work extends the analysis to the popular generalized sidelobe canceler (GSC) structure, while allowing for a positive definite step-size matrix. Analytical models are derived for the mean and mean-square behaviors of the adaptive coefficients. Simulation results are shown to be in excellent agreement with the performance predicted by the theory.
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