Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Résumé

This chapter explores the paradigms of passive radio frequency identification (RFID) technology within smart environments. It discusses the literature about indoor and outdoor localization systems. The chapter introduces the idea of using RFID in smart environments and examines a few fields of application for RFID technology. It also discusses two important challenges that dramatically decrease the accuracy of localization: false readings and the high standard deviation of received signal strength indication (RSSI). The chapter presents the proximity-based solution and explains how to configure an environment to use it, and shows how it was exploited in LIARA's smart home. It describes the trilateration method and explains how it can be adapted with ellipses instead of circles when dealing with directional antenna. The chapter focuses on what kind of knowledge can be extracted from basic RSSI and localization with RFID, and covers the recent exploration of gesture recognition from passive RFID technology and how fuzzy logic can enhance the information.