In this project we study and analyse the static and adaptive relaying protocol in combination with distributed Space-Time codes. In particular, the use of ARQ (Automatic Repeat Request) for the adaptive controls of the transmission methods will be evaluated. For the various methods information-theoretical investigations of the networks in terms of recoverable data rate and the probability of errors will be done. Improvements for the implementation and new approaches for cooperative communication systems will be investigated. Based on the analytical studies, the strategies to optimize the resources allocation in terms of bandwidth, transmission power and scheduling under the consideration of various criteria such as end-to-end capacity, outage probability, or error rate can be developed. Through the efficient use of the resources within the network, the transmission power will be reduced while satisfying the required quality of service. The analytical statements based on exemplary simulations of cooperative multi-hop systems will be verified.
Duration: | 05/2008 - 04/2011 |
Funding: | Central Research Funding, University of Bremen |