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Cancellation of Humming GSM Mobile Telephone Noise
Responsible organisation
2003 (English)Conference paper (Refereed) Published
Abstract [en]

A sometimes annoying problem in the most internationally widespread cellular telephone system, the GSM system, is an interfering signal generated by the switching nature of TDMA cellular telephone system. A humming noise originating from the speech frames, equivalent to 160 samples of data corresponding to 20 ms at 8 kHz sampling rate is sometimes clearly audible. This paper describes a study of two diļ¬€erent software solutions designed to suppress such interference internally in the mobile handset. The methods are Notch Filtering, which is performed on a sample-per-sample basis, and Speech Frame Noise Cancellation, which is an alternative method employing correlators and subtraction, similar to Active Noise Control.

Place, publisher, year, edition, pages
Singapore: IEEE , 2003.
Keyword [en]
Active Noise Cancellation, Cellular Phone, GSM, Bumblebee
National Category
Signal Processing
URN: urn:nbn:se:bth-10282ISI: 000222026600024Local ID: 0 7803 8185 8OAI: diva2:838370
Joint Conference of the 4th International Conference on Information, Communications Processing and Fourth Pacific-Rim Conference on Multimedia (ICICS-PCM 2003)
Available from: 2012-09-18 Created: 2004-01-28 Last updated: 2015-06-30Bibliographically approved

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Claesson, Ingvar
Signal Processing

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