Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux

Type de document

CHAPITRE D'OUVRAGE (CO)

Langue

anglais

Auteur

BOUKOUR ; BOUNA ; RIVENQ ; HEDDEBAUT ; ELASSALI

Résumé / Abstract

This chapter focuses on the indoor positioning system using the Ultra Wide Band, especially for transport applications. The first section is dedicated to introducing the indoor positioning application. After this introduction, we present a brief review of some relevant work . In indoor positioning system especially for transport applications two scenarios are considered: the self localisation and server-based localisation In the self localisation, called the positioning system, the mobile receives signals from the bases station (the transmitter) and interprets the received-signals as ambient information for localising its position in a local coordinate system. The server-based localisation (fixed points) is based on the measure of the signals radiated from a mobile. Then, using the signals measured at distributed sensors, the server estimates the position of the mobile. In the second section of this chapter, we present two approaches for UWB positioning. The first one is based on the Direct Sequence Spread Spectrum UWB technique. The second one is based on the new waveforms, using the orthogonal waveforms, called the Modified Gegenbauer Functions. These functions allow specific waveforms for each transmitter with a good orthogonal propriety. Theses approaches are studied and evaluated in terms of localisation errors for different multipath channels. The multipath channel effect in the UWB environment is introduced and analysed in this section for indoor positioning applications. In the third section, the test results using laboratory instruments are presented to validate the simulation and analytical results, given in the second section. In the fourth section, the first results concerning a new positioning approach for railway application, using UWB radio and Time Reversal techniques, are given. The last section of this chapter is dedicated to proposing conclusions and recommendations for future research.

Editeur

InTech