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This paper presents results of research on per cell propagation calibration-based mobile positioning for GSM. A novel mobile positioning system for GSM networks is proposed and assessed by field measurements and simulations. It utilizes timing advance, Received Signal Strength (RSS) and a per cell-tuned propagation prediction model. Clutter features are modeled to closely represent the real environment to enhance the accuracy of the signal strength prediction. The obtained results indicate that estimation of the mobile position at a sufficient accuracy for most of the location-based services does not have to involve significant changes in the terminals and in the network infrastructure. The performed field measurements and simulation of the designed mobile positioning system reveal that mobile users can be located with an accuracy of 40 meters.
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