Improved relay selection and subcarrier pairing with fairness constraints for OFDM networks

We consider an Amplify-and-Forward relay selection for OFDM networks with fairness constraints where a source node communicates with a destination node with the help of one or more relays. The system model assumes all relays participate and considers the subcarrier pairing with fairness constraints on relays. Our subcarrier allocation algorithm is presented to maximize the system capacity based on complete channel state information. This approach is compared with the theoretical maximum, and it is found the complexity of this algorithm is much lower than that of Hungarian algorithm.