Abstract
In this paper, we analyze a general multiple-microphone and single-loudspeaker 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.
Original language | English |
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Journal | I E E E International Conference on Acoustics, Speech and Signal Processing. Proceedings |
Pages (from-to) | 433-436 |
ISSN | 1520-6149 |
DOIs | |
Publication status | Published - 22 May 2011 |
Event | ICASSP, International Conference of Acoustics, Speech and Signal Processing - Prague, Czech Republic Duration: 22 May 2011 → 27 May 2011 |
Conference
Conference | ICASSP, International Conference of Acoustics, Speech and Signal Processing |
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Country/Territory | Czech Republic |
City | Prague |
Period | 22/05/2011 → 27/05/2011 |
Keywords
- Adaptive filters
- Acoustic feedback cancelation
- Convergence rate
- Steady-state behavior
- Step size parameter