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A Multi-DSP implementation of a Broadband Adaptive Beamformer for use in a Hands-free Mobile Radio Telephone
Responsible organisation
1991 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545 , Vol. 40, no 1, 194-202 p.Article in journal (Refereed) Published
Abstract [en]

An implementation of a broadband adaptive array on a multiprocessor digital signal processing (DSP) system for use in a hands-free mobile radio telephone is described. This implementation of a five-microphone adaptive Griffiths-Jim array can handle FIR filters with up to 128 taps behind each microphone at a sampling rate of 8 kHz. The filter structure makes it possible to combine an adaptive array with a noise canceler. The near-field problem has been solved by using focusing, a speech-controlled adaptive algorithm, and a short hourglass. Preliminary measurements indicate a considerable potential for this technique in hands-free mobile telephony. The array gives a 20-30-dB suppression of a broadband jammer covering 300-1100 Hz, even with three reflecting walls surrounding the microphone.

Place, publisher, year, edition, pages
New York: Institute of electrical and electronics engineers , 1991. Vol. 40, no 1, 194-202 p.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-9407Local ID: oai:bth.se:forskinfoEC124D83EDA5167FC12568A3002CAA22OAI: oai:DiVA.org:bth-9407DiVA: diva2:837244
Note
Published in issue February 1991Available from: 2012-09-18 Created: 2000-03-15 Last updated: 2015-06-30Bibliographically approved

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  • apa
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Output format
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