Cancellation of Humming GSM Mobile Telephone Noise
Blekinge Institute of Technology, Department of Telecommunications and Signal Processing2003 (English)Conference paper (Refereed) Published
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.
Place, publisher, year, edition, pages
Singapore: IEEE , 2003.
Active Noise Cancellation, Cellular Phone, GSM, Bumblebee
IdentifiersURN: urn:nbn:se:bth-10282ISI: 000222026600024Local ID: oai:bth.se:forskinfo11FBB4B7A0AB18C7C1256E290046AFA8ISBN: 0 7803 8185 8OAI: oai:DiVA.org:bth-10282DiVA: diva2:838370
Joint Conference of the 4th International Conference on Information, Communications Processing and Fourth Pacific-Rim Conference on Multimedia (ICICS-PCM 2003)