Co-funded by: Federal Ministry for Economic Affairs and Energy (BMWi)

Duration: June 2007 - December 2010

Technologies for Terminals in Opportunistic Radio Applications

Opportunistic radio is an approach to meet the growing demand on wireless broadband services by an efficient utilization of the scarce frequency resource, especially for frequency bands which are discontinuously used. The basic idea of an opportunistic radio is a multi-standard transceiver, which contains an additional component for continuous spectrum sensing. Based on the measurements of the spectrum sensor, usable opportunities in time and frequency domain are identified and a best suited air interface is chosen. So an opportunistic radio system has to support different physical air interfaces and requires highly advanced network algorithms. All these challenges are addressed in the "Teropp" project, whereas analogue and digital hardware concepts as well as network algorithms are studied.

The project is organized as joint cooperation between three German Fraunhofer Institutes and six French "Carnot-Institutes" The German partners are funded by the German Ministry of Education and Research.

Within the Teropp project our institute contributes different work packages in the areas of high frequency technology, digital signal processing and network algorithms. The first work package focuses on the reconfigurabe RF-communication frontend, for which a high efficiency, broadband power amplifier is developed. Further work is done in the field of reconfigurable computing elements, since an opportunistic radio has to support software defined transmission standards. In this work package special processing elements suited for single carrier transmission are investigated. Network management and optimized network algorithms are very crucial problems for the realization of opportunistic radio systems. Thus we also examine optimal solutions for dynamic spectrum and ressource allocation, where approaches from mathematic game theory are used.