Wireless communication has an important role in our everyday lives. The demand to replace wires is growing because wireless technologies provide flexibility and comfort. There are several types of wireless technologies, with great variety of range and applications. Some of them are specified for only a few applications while others are multipurpose.
In my thesis I analyse the following short range radio technologies: Bluetooth Low Energy, ZigBee, WLAN, RFID, NFC and UWB. I present the development of these technologies, the related standards, their basic parameters (data rates, operating frequencies), the security issues and solutions and the main applications. After this I briefly compare the most important applications of these technologies.
I also conduct measurements in the topic of sensor networks and indoor positioning. In case of indoor positioning I examine RFID and WLAN technologies. The aim of my measurements is to observe the changing of signal intensity as a function of distance, and whether it can be used for indoor positioning applications. I also analyse the shielding effect of certain materials on the signal. Furthermore, in case of RFID I examine how the different positions of tags influence their visibility.
For sensor networks I investigate Bluetooth LE technology: the disturbing effects of surrounding objects and other radio signals using the same channels and how they influence the readability of a sensor in office environment and also in open air.
In the end I evaluate the results and briefly outline the future development possibilities regarding the examined application cases.