DocumentCode :
2165865
Title :
Efficient convex optimization for real-time robust beamforming with microphone arrays
Author :
Durant, Eric ; Merks, Ivo ; Woods, Bill ; Xiao, Jinjun ; Zhang, Tao ; Luo, Zhi-Quan
Author_Institution :
Starkey Laboratories, Inc., Eden Prairie, MN 55344, USA
fYear :
2011
fDate :
22-27 May 2011
Firstpage :
2656
Lastpage :
2659
Abstract :
This paper presents an efficient implementation of a robust adaptive beamforming algorithm based on convex optimization for applications in the processing-constrained environment of a digital hearing aid. Several modifications of the standard interior point barrier method are introduced for use where the array data covariance matrix is changing rapidly relative to the algorithm´s convergence rate. These efficiency improvements significantly simplify the computation without affecting the algorithm´s fast convergence, and are useful for real-time adaptive beamforming regardless of the rate of array correlation change. Simulation results show that this implementation is numerically stable and succeeds where many minimum-variance distortionless response (MVDR) solutions fail.
Keywords :
Array signal processing; Convex functions; Hearing aids; Microphones; Power generation; Real time systems; Robustness; acoustic beamforming; adaptive directionality; barrier method; hearing aids; second-order cone programming;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on
Conference_Location :
Prague, Czech Republic
ISSN :
1520-6149
Print_ISBN :
978-1-4577-0538-0
Electronic_ISBN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2011.5947031
Filename :
5947031
Link To Document :
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