Title :
Subscriber based TDOA location techniques for the Motorola iDEN system
Author :
Birchler, Mark ; Jasper, Steve ; Oros, Nicholas ; Jones, Debbie ; Makhlouf, Sam ; Tziortzis, Alek
Author_Institution :
Motorola Inc., Schaumburg, IL, USA
Abstract :
This paper discusses development of the technology required to enable location services on Motorola´s iDEN cellular phone system. Our approach consists of handset based time difference of arrival (TDOA) measurement. The performance of this system has been determined both by computer simulation and field trials. The overall TDOA system and specific algorithms utilized are described. Performance estimates for numerous special cases are discussed. These cases include highway, in-building, and coverage fringe. Particular attention is paid to the effects of propagation environments (e.g., urban, rural, etc.) on accuracy performance. In addition, bench test and field test performance data is reported and compared to computer simulation predictions
Keywords :
cellular radio; digital simulation; subscriber loops; telecommunication computing; Motorola iDEN system; cellular phone system; computer simulation; performance estimates; propagation environments; subscriber based TDOA location; time difference of arrival measurement; Equations; Interference; Least squares methods; Matched filters; Noise measurement; Radio transmitters; Receivers; Signal resolution; Time measurement; Timing;
Conference_Titel :
Research Challenges, 2000. Proceedings. Academia/Industry Working Conference on
Conference_Location :
Buffalo, NY
Print_ISBN :
0-7695-0628-3
DOI :
10.1109/AIWORC.2000.843296
