Adaptive Microphone Array Employing Calibration Signals. An Analytical Evaluation

Document type: Researchreports
Full text:
Author(s): Sven Nordholm
Title: Adaptive Microphone Array Employing Calibration Signals. An Analytical Evaluation
Series: Research Report
Year: 1995
Issue: 7
ISSN: 1103-1581
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 report evaluates an adaptive microphone array which facilitates a simple built-in calibration to the environment and instrumentation. The method has been suggested for use in hands-free mobile telephones for both speech enhancement and acoustic echo-cancellation as well as speech recognition. The scheme has several advantages such as a simple calibration procedure, directed jammer suppression, versatile robust beamforming and reduced target signal distortion. The analysis employs noncausal Wiener filters yielding compact and effective theoretical suppression limits.
Subject: Signal Processing\Speech Enhancement
Keywords: Speech Enhancement, Adaptive Beamforming, Microphone Array
URN: urn:nbn:se:bth-00022
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