Cancellation of Humming GSM Mobile Telephone Noise

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Ingvar Claesson, Andreas Nilsson
Title: Cancellation of Humming GSM Mobile Telephone Noise
Conference name: Joint Conference of the 4th International Conference on Information, Communications Processing and Fourth Pacific-Rim Conference on Multimedia (ICICS-PCM 2003)
Year: 2003
Pagination: 114-18, vol. 1
ISBN: 0 7803 8185 8
Publisher: IEEE
City: Singapore
ISI number: 000222026600024
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: icl@bth.se, andreas.s.nilsson@ericsson.com
Language: English
Abstract: 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 different 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.
Subject: Signal Processing\Speech Enhancement
Keywords: Active Noise Cancellation, Cellular Phone, GSM, Bumblebee
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