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Techniques embarquées de localisation indoor exploitant le protocole Bluetooth pour des objets connectés basse consommation

Xavier Tolza 1
1 LAAS-S4M - Équipe Instrumentation embarquée et systèmes de surveillance intelligents
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : Localization is an information used by many fields in both the civil and military sectors: war, exploration, aeronautical/naval/space navigation, construction, logistics, etc.Since the Second World War and the democratization of consumer radio equipment (telephones, GNSS receivers, etc.), localization by radio waves has gradually established itself as the standard method of localization in a large number of fields.From the last century until today, the capacities of localization systems have increased, thanks to the constant improvement of the computing power of integrated circuits and their miniaturization, making it possible to integrate localization functionalities in an increasing number mobile equipment. The measurement of radio signals and the calculations necessary for position estimation can now be performed on small on-board equipment.However, current solutions mostly use fixed and wired radio equipment to allow the location of mobile connected objects. However, it is preferable for many use cases that the entire system runs on batteries: temporary deployments, environments without a power network or too high installation costs. It is therefore necessary to assess and improve the energy autonomy of current location algorithms.Many connected objects are already in circulation, research around a location system compatible with those already existing equipment arouses great research interest. A large part of current connected objects using standardized protocols in the 2.4GHZ ISM band, numerous studies assess the relevance of those signals for indoor positioning. The Bluetooth standard is widely used and energy efficient, making it an attractive candidate for indoor location. The studies presenting a localization system using this protocol are numerous, but there is no conclusive comparison on the performances of the main existing algorithms using ultra low consumption equipment.The objective of this study is to study and develop a localization system applied to indoor localization, using the Bluetooth protocol and fully autonomous on battery. A comparison between the main existing techniques and algorithms (reception power (RSSI), arrival time (ToA) and angle of arrival (AoA)) will be carried out and energy autonomy will be assessed.First, the physical models of these three techniques are compared, and a parametric optimization to estimate a position from the raw measurements is presented. Different energy management strategies are presented and the methods used to carry out the measurements for location with low consumption are detailed.Finally, the energy performance of the system is evaluated, the overall autonomy is estimated and the position error distribution function is given for each of the three compared techniques.
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Submitted on : Tuesday, March 30, 2021 - 11:54:32 AM
Last modification on : Thursday, June 10, 2021 - 3:03:43 AM


Version validated by the jury (STAR)


  • HAL Id : tel-03117260, version 2


Xavier Tolza. Techniques embarquées de localisation indoor exploitant le protocole Bluetooth pour des objets connectés basse consommation. Micro et nanotechnologies/Microélectronique. INSA de Toulouse, 2020. Français. ⟨NNT : 2020ISAT0013⟩. ⟨tel-03117260v2⟩



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