Topic
GSM frequency bands
About: GSM frequency bands is a research topic. Over the lifetime, 559 publications have been published within this topic receiving 5067 citations.
Papers published on a yearly basis
Papers
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16 Jul 2014TL;DR: In this article, a self-organizing network (SON) provides automated interfrequency load balancing for a base station such as a NodeB, where a plurality of scenarios S may be provided, and a policy P may be defined for each, when the NodeB encounters a scenario S, SON may send configuration directives to implement policy P.
Abstract: In an example, a self-organizing network (SON) provides automated interfrequency load balancing for a base station such as a NodeB. The NodeB may provide a plurality of carriers, such as in a plurality of UARFCN frequencies, and the SON may provide configuration directives for increasing efficiency. For example, when one carrier becomes loaded, the SON may update neighbor associations to take advantage of relatively unloaded frequency carriers. A plurality of scenarios S may be provided, and a policy P may be defined for each. When the NodeB encounters a scenario S, SON may send configuration directives to implement policy P. Similar concept and policy could be applied in conjunction with INTER Technology Neighbor Definitions between LTE and UMTS and UMTS and GSM. Example if GSM Frequency Neighbors needs to be replaced with different Frequency Neighbors from UMTS based on Load or RF conditions.
2 citations
01 Jan 2012
TL;DR: Over the years, the GSM has won the minds and souls billions; it is in use in over 200 countries worldwide and accounts for over 70% of the world's digital market.
Abstract: The Global System for Mobile Communications (GSM) signal was first powered on in Finland in radiolinja's network at 900 MHz in 1991. There were plans since the 1982 by the Conference of European Post and Telecommunication Administrators (CEPT) to develop a pan-European compatible cellular system. Although the CEPT created the Group Special Mobile (GSM) standard, the development was continued by the European Telecommunications and Standards Institute (ETSI) which published the first phase of the GSM standards in 1989 (Gold, 2011). Over the years, the GSM has won the minds and souls billions; it is in use in over 200 countries worldwide and accounts for over 70% of the world's digital market (Gold, 2011). The architecture of the GSM is hierarchic simple and consists of four main components namely;
2 citations
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TL;DR: In this paper, a new approach for adaptive active control combined with a multiple-input multiple-output (MIMO) antenna system to suppress the electromagnetic field at a certain volume in space (e.g., at the human head) is proposed.
Abstract: In this paper we propose a new approach em- ploying adaptive active control algorithms combined with a Multiple-Input Multiple-Output (MIMO) antenna system to suppress the electromagnetic field at a certain volume in space (e.g., at the human head). We will investigate the effects of the size and number of MIMO antenna elements on the system performance and test the algorithms at dif- ferent carrier frequencies (e.g., GSM bands and UMTS).
2 citations
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01 Jun 2016TL;DR: In this article, a printed log periodic dipole antenna (LPDA) with 3/2 curve fractal elements for size reduction and wider operating frequency bands is presented, which covers the standard of WCDMA 850, GSM 900, LTE 1800/2600, PCS 1900, UMTS 2100 and WLAN IEEE802.11b/g consequently.
Abstract: A printed log periodic dipole antenna (LPDA) with 3/2 curve fractal elements for size reduction and wider operating frequency bands is presented. The antenna dimension is about 123 × 181.71 mm2 reducing approximately 23.81% compared with the conventional LPDA. The radiation patterns are directional at all of operating frequencies and the average peak gain of the antenna is about 4.2 dBi. Additionally, the antenna has a wider impedance bandwidth about 135.45% supporting the operating frequency ranges are 800 MHz – 2600 MHz. They cover the standard of WCDMA 850, GSM 900, LTE 1800/2600, PCS 1900, UMTS 2100, and WLAN IEEE802.11b/g consequently.
2 citations
01 Jan 2010
TL;DR: This paper presents a comprehensive study on the performance of various types of handset antennas (two internal, two external) next to human head and hand next to GSM 900, DCS, PCS and UMTS frequency bands.
Abstract: The interaction between human head/hand tissues and handset antennas is a cru- cial concept in mobile communications. Mobile handsets are used in proximity to user's body and this afiect the transmitted or received power of the handset and some other characteristics e.g., VSWR, radiation pattern. This paper presents a comprehensive study on the performance of various types of handset antennas (two internal, two external) next to human head and hand. The investigated frequency range covers GSM 900, DCS, PCS and UMTS frequency bands. Sim- ulations are performed on antennas next to a simplifled two layer cubical hand model and a six layer spherical head model. Radiation patterns and VSWR of these antennas are computed in free space as well as in the presence of head and hand. In addition, radiation e-ciencies of these handset antennas are computed in the presence of head and hand.
2 citations