Conception et mise en oeuvre d'une architecture logicielle pour l'amélioration des performances d'un simulateur GNSS et l'intégration de modèles multitrajets

Abstract

Satellite positioning technology is getting more attention than any other time in its history that begun at the end of the 20"^ century. In addition to GPS, new constellations are appearing like Galileo the European satellite System, the Chinese Beidou and GLONASS the Russian constellation. Ail of thèse positioning Systems, called GNSS (Global Navigation Satellite System) will help to develop new applicafions which are more and more précise and reliable. The intégration of différent signais represents an important issue that can lead to those achievements. Developing new types of receivers and integrating them in wireless applications is one of the biggest issues nowadays, but we hâve to consider the importance of developing GNSS simulators that allow us to générale real satellite signais, so we can test the reliability, the accuracy and the robustness of new developed receivers. This thesis focuses on the development of new software architecture for a GNSS Simulator. This GNSS Simulator is used for the génération of real time scénarios in testing hybrid GPS/Galileo Receivers. The Simulator project is divided into three parts: the software part, the real time signal processing part and the RF part. The prime focus of this thesis is on the software part. FirsUy, we validated the computations and the signals generated, so as to obtain accurate positions from the receiver. After that, we developed a new software architecture that is much better than the first software version. Our purpose is to hâve high quality software, which has a flexible architecture, easy to test and at a compétitive cost. The last part of the project focuses on modeling multipath with our GNSS Simulator.

Date	3 May 2010
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Ammar B. Kouki (Supervisor)