Title :
An analysis of TOA-based location for IS-95 mobiles
Author :
Messier, G.G. ; Nielsen, J.S.
Author_Institution :
Nortel Networks, Calgary, Alta., Canada
Abstract :
This paper uses field measurements to characterize the performance of a time-of-arrival (TOA) based CDMA mobile location system. The measurements are used to determine the ranging error experienced by a TOA detector due to the multipath radio channel. The performance of a simple threshold detector and an enhanced least-squares detector is investigated. The relationship between ranging error and position error is illustrated using a dilution of precision calculation. Ranging error is also combined with the probability of false threshold detection to determine the signal to noise ratio required at the correlator output
Keywords :
cellular radio; code division multiple access; least squares approximations; measurement errors; multipath channels; parameter estimation; signal detection; CDMA mobile location system; IS-95 mobile radio; TOA detector; TOA estimation; TOA-based location; dilution of precision calculation; false threshold detection probability; field measurements; least-squares detector; multipath radio channel; position error; ranging error; signal to noise ratio; threshold detector; time-of-arrival; Base stations; Correlators; Detectors; Equations; FCC; Global Positioning System; Land mobile radio cellular systems; Multiaccess communication; Signal to noise ratio; Telephony;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.798599
