A multi-carrier one-way relay network is considered, in which a source wishes to send information to a destination via a full-duplex amplify-and-forward relay. We perform power allocation across different subcarriers for the source and the relay, as well as subcarrier pairing at the relay, so as to maximize the achievable sum rate subject to individual power budget constraint at each transmit node, and therefore formulate the joint power allocation and subcarrier pairing optimization problem. Due to the interdependency in the power allocation between self-interference subcarrier and outgoing subcarrier at the relay node, we propose a suboptimal scheme to trade the performance for computational complexity. Then dual decomposition technique is employed for power allocation, while the subcarrier pairing problem is solved by Hungarian algorithm. Simulation results show that the proposed resource allocation scheme can significantly improve system performance.
['Na Li', 'Yong Li', 'Mugen Peng', 'Wenbo Wang']
Resource Allocation in Multi-Carrier Full-Duplex Amplify-and-Forward Relaying Networks