SCALE FACTOR AMBIGUITY CORRECTION FOR SUBBAND BLIND MULTICHANNEL IDENTIFICATION

SCALE FACTOR AMBIGUITY CORRECTION FOR SUBBAND BLIND MULTICHANNEL IDENTIFICATION
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子带盲多通道识别的尺度因子模糊度校正

DOI：
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发表时间：
2008
期刊：
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通讯作者：
P. Naylor
P. Naylor
中科院分区：
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文献类型：
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作者：
N. Gaubitch;Xiang Lin;P. Naylor

文献摘要

被引文献

相似文献

子带系统识别已被证明在声学回声消除等应用中是有益的。子带中盲多通道系统识别的一个问题是子带系统只能被正确识别到任意比例因子。该比例因子模糊度在所有通道中都是相同的，但在子带之间可能不同，因此限制了此类估计的可用性。我们展示了如何使用子带和全带估计之间的关系以及全带互相关误差来解决比例因子模糊度问题。通过模拟实验演示了该方法的操作。
Subband system identification has proved beneficial in applications such as acoustic echo cancellation. A problem for blind multichannel system identification in subbands is that the subband systems can only be identified correctly up to an arbitrary scale factor. This scale factor ambiguity is the same across all channels but can differ between the subbands and therefore, limits the usability of such estimates. We show how the relation between the subband and the full-band estimates, together with the full-band cross-relation error, can be used to resolve the scale factor ambiguity problem. The operation of this approach is demonstrated with simulated experiments.