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 |
