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ICASSP
2011
IEEE

Analysis of adaptive feedback and echo cancelation algorithms in a general multiple-microphone and single-loudspeaker system

13 years 3 months ago
Analysis of adaptive feedback and echo cancelation algorithms in a general multiple-microphone and single-loudspeaker system
In this paper, we analyze a general multiple-microphone and singleloudspeaker system, where an adaptive algorithm is used to cancel acoustic feedback/echo and a beamformer processes the feedback/echo canceled signals. This system can be viewed as part of a typical hearing aid system and/or a traditional acoustic echo cancelation system. We introduce and derive an approximation of a useful frequency domain measure – the power transfer function – and show how to predict the system stability bound, convergence rate and the steady-state behavior across time and frequency. Furthermore, we show how the derived expressions can be used to determine e.g. the step size parameter in the adaptive algorithms to achieve a desired system property e.g. convergence rate at a specific frequency.
Meng Guo, Thomas Bo Elmedyb, Søren Holdt Je
Added 21 Aug 2011
Updated 21 Aug 2011
Type Journal
Year 2011
Where ICASSP
Authors Meng Guo, Thomas Bo Elmedyb, Søren Holdt Jensen, Jesper Jensen
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