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Sensor-assisted localization in cellular systems
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DOI：10.1109/TWC.2007.060316.png)
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Abstract
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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.
Keywords:
cellular systems
localization
mobile terminals
path-loss models
sensor networks
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