ABSTRACT
This chapter proposes an end-to-end link adaptation and selection method for orthogonal frequency-division multiplexing-based wireless relay networks. Relaying is selected only when it can improve the end-to-end throughput as compared to that of w/o relay transmissions. The chapter describes the system model. It presents the end-to-end throughput performance of the simple-adaptive decode and forward (DF), amplify-and-forward and w/o relay schemes. The chapter also presents the proposal for an end-to-end link adaptation and selection method for wireless relay networks and shows its superior performance. It provides the time-divisioned transmission sequences to achieve the cooperative diversity schemes for DF-based relaying. Simple and efficient adaptive modulation and coding (AMC) decision rules have been developed for wireless relay networks. Such rules are able to take into account the fading conditions in all the wireless links constituting a relay network whereby the end-to-end throughput is optimized. The DF-based relaying provides superior performance with properly designed AMC.
