Contributions on Hybrid Localization Techniques For Heterogeneous Wireless Networks

Abstract : Recent advancement in wireless networks and systems has seen the rise of localization techniques as a worthwhile and cost-effective basis for novel services. These location based services have been more and more beneficial and money-making for telecommunications operators and companies. Various LBSs can be offered to the user such as tracking, advertisement, security, and management. Wireless networks themselves may benefit from localization information to enhance the performances of the different network layers. Location based routing, synchronization, interference cancellation are some examples of fields where location information can be fruitful. Two main tasks a localization system must be able to do: measurement of location-dependent parameters (RSSI, TOA, and TDOA) and estimation of position using location estimation techniques. The main goal of this dissertation is the study of different location estimation techniques: algebraic and geometric. Studied algebraic techniques are least-squares, maximum likelihood, and semidefinite programming. The proposed geometric technique RGPA is based on interval analysis and geometric representation of location-dependent parameters. The focus is put on the fusion of different location-dependent parameters on the positioning accuracy. Estimation and measurement of location-dependent parameters are also investigated using a provided UWB measurements campaign in order to have a complete understanding of localization field.
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Contributor : Mohamed Laaraiedh <>
Submitted on : Saturday, September 17, 2011 - 8:04:38 AM
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  • HAL Id : tel-00624436, version 1

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Mohamed Laaraiedh. Contributions on Hybrid Localization Techniques For Heterogeneous Wireless Networks. Signal and Image processing. Université Rennes 1, 2010. English. ⟨tel-00624436⟩

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