UWB SATCOM Towards Cognitive Radio

Multiband ultra wide band(UWB) schemes are proposed in IEEE 802.15 TG3a and terrestrial short-range high-speed UWB communications have been mature. In this paper, the possibility of UWB SATCOM systems using cognitive radio(CR) is considered. CR is an emerging approach for a more flexible usage of the precious radio spectrum resources. UWB technology as one of the transmission techniques suitable for implementing a Cognitive Radio system is discussed. A SATCOM downlink employing the multiband UWB signal transmission is considered. The total bandwidth is assumed to be 500 MHz in the allocation of the satellite downlink and it is divided into multiple subbands. The link budget calculation and the estimation of the signal transmission speed are reported assuming multiband UWB signal transmission from a GSO satellite to the earth´s surface. The initial results show that the UWB SATCOM towards CR has broad application prospect.