Adaptive Microphone Array Employing Calibration Signals. An Analytical Evaluation

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Sven Nordholm, Ingvar Claesson, Mattias Dahl
Title: Adaptive Microphone Array Employing Calibration Signals. An Analytical Evaluation
Journal: IEEE transactions on speech and audio processing
Year: 1999
Volume: 7
Issue: 3
Pagination: 241-52
ISSN: 1063-6676
Publisher: IEEE
City: New York
ISI number: 000079911300001
Organization: Blekinge Institute of Technology
Department: Dept. of Signal Processing (Institutionen för signalbehandling)
Dept. of Signal Processing S-372 25 Ronneby
+46 455 780 00
http://www.hk-r.se/isb/isb_en.html
Authors e-mail: Sven.Nordholm@isb.hk-r.se
Language: English
Abstract: This paper gives an analytical description of an adaptive microphone array that facilitates a simple built-in calibration to the environment and instrumentation. This method, suggested for use in hands-free mobile telephones and speech recognition systems for cars, provides speech enhancement and acoustic echo-cancellation. The scheme offers several advantages, such as a simple calibration procedure, suppression of directional sources, versatile robust beamforming, and reduced target signal distortion. The analysis employs noncausal Wiener filters yielding compact and effective theoretical suppression limits
Subject: Signal Processing\Beamforming
Note: Submitted for publication to IEEE Transactions on Speech and Audio Processing, December 1996
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