Practical Metropolitan-Scale Positioning for GSM Phones

2006 ◽  
pp. 225-242 ◽  
Author(s):  
Mike Y. Chen ◽  
Timothy Sohn ◽  
Dmitri Chmelev ◽  
Dirk Haehnel ◽  
Jeffrey Hightower ◽  
...  
Keyword(s):  
Gsm Phones

An E-mode GaAs FET power amplifier MMIC for GSM phones

2002 ◽  
Author(s):  
W. Abey ◽  
T. Kawai ◽  
I. Okamoto ◽  
M. Suzuki ◽  
C. Khandavalli ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Gsm Phones

Are GSM Phones THE Solution for Localization?

2006 ◽  
Author(s):  
A. Varshavsky ◽  
Mike Y. Chen ◽  
E. de Lara ◽  
J. Froehlich ◽  
D. Haehnel ◽  
...  
Keyword(s):  
Gsm Phones

Effect of Magnetic Field From Mobile Phone on Brain

2015 ◽  
Vol 10 (3) ◽  
pp. 2784-2794
Author(s):  
Dr. Esmail Ali
Keyword(s):  
Magnetic Field ◽  
Power Control ◽  
Mobile Phone ◽  
Transmission Lines ◽  
Electrical Equipment ◽  
Mobile Telephony ◽  
Average Output ◽  
Field Exposure ◽  
The Third ◽  
Gsm Phones

Human exposure to electromagnetic field (EMF) comes from many different sources and occurs in various situations in everyday life. Man-made static fields are mainly found in occupational settings, such as close to magnetic resonance imaging (MRI) scanners, although DC high-voltage overhead transmission lines are being constructed, which are expected to expose larger parts of the population to static electric and magnetic fields.Today, for power regulation most modern electrical equipment uses electronics instead of transformers. Examples include the switched power supplies to laptops, drilling tools, chargers of mobile phones and similar devices. As a consequence, the frequency content of the daily magnetic field exposure has changed mainly by adding odd harmonics (150 Hz, 250 Hz, 750 Hz, etc.). In particular, the third harmonic (150 Hz) has become another dominating frequency in our environment.In particular for brain tissues, the mobile phone used at the ear remains the main source of exposure. However, since the first generation of mobile telephony, the technology aimed at reducing the emitted power of mobile handsets. In particular, for Global System for Mobile communication (GSM) already the introduction of dynamic power control reduced the average output power to about 50% of its rated value during calls, whereas the use of discontinuous transmission during voice calls gave a further 30% reduction in average emitted power. Adaptive power control became faster and more effective in the third-generation (3G) of mobile telephony systems leading to a further reduction (by about two orders of magnitude) in the specific absorption Specific energy Absorption Rate (SAR) compared to GSM phones. In addition, hands-free kits reduce the energy absorbed by the head drastically. Digital Enhanced Cordless Telecommunications (DECT) phones are another source of everyday exposure.

Ultra-Low Cost GSM Phones Enabled by Baseband-Radios with Integrated Power-Management

2007 ◽  
Author(s):  
Christian Kranz ◽  
Markus Hammes ◽  
Jens Kissing ◽  
Dietolf Seippel ◽  
Vincent Rezard ◽  
...  
Keyword(s):  
Power Management ◽  
Low Cost ◽  
Gsm Phones

The effects of electromagnetic field emitted by GSM phones on working memory

Neuroreport ◽  
2000 ◽  
Vol 11 (8) ◽  
pp. 1641-1643 ◽  
Author(s):  
Mika Koivisto ◽  
Christina M. Krause ◽  
Antti Revonsuo ◽  
Matti Laine ◽  
Heikki Hämäläinen
Keyword(s):  
Working Memory ◽  
Electromagnetic Field ◽  
Gsm Phones

Measurement of EMI on network cables due to multiple GSM phones

2000 ◽  
Vol 42 (4) ◽  
pp. 358-367 ◽  
Author(s):  
J.P. Hertel ◽  
I.D. Flintoft ◽  
S.J. Porter ◽  
A.C. Marvin
Keyword(s):  
Gsm Phones

Cochlear implants and GSM phones

2001 ◽  
Vol 30 (1) ◽  
pp. 54-56 ◽  
Author(s):  
Martti J. Sorri ◽  
Kerttu H. Huttunen ◽  
Taina T. Välimaa ◽  
Petri J. Karinen ◽  
Heikki J. Löppönen
Keyword(s):  
Cochlear Implants ◽  
Gsm Phones
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