Abstract
In this paper, we investigate robust beamforming techniques for wideband signal processing in noisy and reverberant environments. In such environments, steering vector estimation errors are in- evitable, leading to a degradation of the beamformer performance. Here, we study two types of beamformers that are robust against steering vector estimation errors. The first type includes robust Capon beamformers, where the underlying principle is to add a steering vector uncertainty constraint and/or a norm constraint to the optimization problem to improve the beamformer’s robustness. The second type is the amplitude and phase estimation method, which utilizes both temporal and spatial smoothing. Experiments are presented to demonstrate the performance of the considered ro- bust beamformers in acoustic environments. The results show that the robust beamformers outperform the non-robust beamformers in terms of predicted speech quality and intelligibility for different s- teering vector and covariance matrix estimation errors.
Original language | English |
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Title of host publication | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) |
Publisher | IEEE |
Publication date | Oct 2017 |
Pages | 86-90 |
ISBN (Electronic) | 978-1-5386-1632-1 |
DOIs | |
Publication status | Published - Oct 2017 |
Event | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics - Mohonk Mountain House, New Paltz, United States Duration: 15 Oct 2017 → 18 Oct 2017 http://www.waspaa.com/ |
Workshop
Workshop | 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics |
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Location | Mohonk Mountain House |
Country/Territory | United States |
City | New Paltz |
Period | 15/10/2017 → 18/10/2017 |
Internet address |
Series | I E E E Workshop on Applications of Signal Processing to Audio and Acoustics |
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ISSN | 1931-1168 |