Multi-user communication over hybrid FSO UWB channels

Abstract

UWB communication provides high data rates with a simple signal model over RF channels up to 10 meters. In literature, several studies have been done to generate and transmit UWB signals over optical carrier via fiber cables. Low noise and attenuation values of fiber cables makes UWB over fiber technology best candidate for inter city UWB signal distribution. On the other hand, high deployment costs is the weakness point of the fiber cables especially for the inner city distribution. In this thesis we have proposed a system to carry UWB signals over free space optic channel to fill the gap between fiber and RF communication. Performance results show that proposed system is able to provide reliable data communication for open air conditions. Moreover, different receiver structures are analyzed with multiuser interference since the system purpose is inner city data distribution. Multiuser performance is evaluated for different fading regimes, synchronous-asynchronous user cases and dependent-independent multiuser fading environments.