Sensor-assisted localization in cellular systems

Authors:
Liang Xiao;L. J. Greenstein;N. B. Mandayam
Affiliations:
Rutgers Univ., North Brunswick;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2007

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Abstract

We investigate the use of an auxiliary network of sensors to locate mobiles in a cellular system, based on the received signal strength at the sensor receivers from a mobile's transmission. The investigation uses a generic path loss model incorporating distance effects and spatially correlated shadow fading. We describe four simple localization schemes and show that they all meet E-911 requirements in most environments. Performance can be further improved by implementing the MMSE algorithm, which ideally reaches the Cramer-Rao bound. We compare the MMSE algorithm and the four simple schemes when the model parameters are estimated via inter-sensor measurements.