Dynamic Relay Selection and Resource Allocation in Cooperative Networks Based on OFDM

In this paper, we are planning to introduce a new method for relay selection and resource allocation in OFDM-based cooperative networks. Up to now, there have been relatively few works clearly concentrating on the combination of relay selection and resource allocation in such networks. In our work, a network with a single transmitter, a single receiver and a group of relays is considered. Relays work on Amplify and Forward (AF) method and there is no direct link between the transmitter and the receiver. The optimization problem is to maximize the throughput of the receiver with constraints on the amounts of the power of the transmitter and relays, and subcarriers. We will introduce an algorithm to select the best relay for each subcarrier. Eventually, we will compare our results to the optimum results and see how our proposed scheme, while being simple, performs very close to the optimum one.