NDLI: Notch Filtering of humming GSM mobile telephone noise

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Proceedings of ICICS, 1997 International Conference on Information, Communications and Signal Processing. Theme: Trends in Information Systems Engineering and Wireless Multimedia Communications (Cat.

Notch Filtering of humming GSM mobile telephone noise

Content Provider	IEEE Xplore Digital Library
Author	Claesson, I. Rossholm, A.
Copyright Year	2005
Description	Author affiliation: Blekinge Inst. of Technol., Ronneby (Claesson, I.)
Abstract	A common problem in the world's most widespread cellular telephone system, the GSM system, is the interfering signal generated in TDMA cellular telephony. The infamous "bumblebee" is generated by the switching nature of TDMA cellular telephony, the radio circuits are switched on and off at a rate of approximately 217 Hz (GSM). This paper describes a study of two solutions for eliminating the humming noise with IIR notch filters. The simpler one is suitable for any exterior equipment. This method still suffers from a small residual of the noise, resulting from the IDLE slots of the sending mobile. The more advanced IIR structure for use within the mobile also eliminates this residual
Starting Page	1320
Ending Page	1323
File Size	1982125
Page Count	4
File Format	PDF
ISBN	0780392833
DOI	10.1109/ICICS.2005.1689270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-06
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Filtering GSM Telephony Speech Acoustic noise Frequency Switching circuits Microphones Power harmonic filters Noise generators
Content Type	Text
Resource Type	Article

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