TY  - JOUR
T1  - Enhanced Observed Time Difference Location Technology Through Fading Channels in GSM Networks
AU - , Mohammad S. Sharawi 
JO  - Asian Journal of Information Technology
VL  - 5
IS  - 10
SP  - 1158
EP  - 1165
PY  - 2006
DA  - 2001/08/19
SN  - 1682-3915
DO  - ajit.2006.1158.1165
UR  - https://makhillpublications.co/view-article.php?doi=ajit.2006.1158.1165
KW  - GSM
KW  -fading channels
KW  -EOTD
KW  -location services
AB  - This study presents a communications model that investigates the position accuracy of a Global Standard Mobile (GSM) phone employing the Enhanced Observed Time Difference (EOTD) location technology. The EOTD positioning technique requires the Mobile Station (MS) to detect signals from at least three Base Stations (BS). This study assumes the three BSs are synchronized in time. For a given BS geometry with respect to the MS, a Monte Carlo simulation was performed to assess the two-dimensional position accuracy of the MS in Rayleigh and Ricean fading channels. In each channel, a Monte Carlo simulation was performed for a good and a bad BS-to-MS geometry. Location-based services have been standardized for incorporation into 3<SUP>rd</SUP> generation wireless communications as a result of the Federal Communications Commission`s (FCC) mandate on wireless carriers to provide Automatic Location Information (ALI) during emergency 911 calls. This mandate has driven the wireless carriers to explore terrestrial, satellite and hybrid based location technology solutions. The study concludes with the fact that EOTD as the primary location technology does not fulfill the FCC E911 mandate and Hybrid technologies might overcome the EOTD limitations.
ER  -