Cancellation of Humming GSM Mobile Telephone Noise
|Document type:||Conference Papers|
|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)|
|Pagination:||114-18, vol. 1|
|ISBN:||0 7803 8185 8|
|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:||firstname.lastname@example.org, email@example.com|
|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|