Integration of GPS and Cellular Networks to Improve Wireless Location Performance

C. Ma

Abstract:	Wireless location is important because of the E-911 application. Both network-based solutions and GPS-based solutions have been proposed for this application. However, neither of them can handle the issues well because both approaches suffer from poor signal availability and low measurement accuracy problems in serious fading environments such as, urban canyons or inside buildings. In this paper, the poor signal availability of cellular networks is first discussed. To improve location performance, GPS and cellular networks are suggested to be used simultaneously. Three integration architectures are proposed. They are the epoch-by-epoch Least-Squares (LS)-based integration, the position domain Kalman filter-based integration, and the measurement domain Kalman filter-based integration. Simulated results demonstrate the effectiveness of these three integration schemes.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	1585 - 1596
Cite this article:	Ma, C., "Integration of GPS and Cellular Networks to Improve Wireless Location Performance," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 1585-1596.
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