An Energy Pricing-Based Subcarrier Pairing and Power Allocation for Cooperation OFDM System

To prolong the network lifetime, the energy usage of the nodes must be balanced in cooperative orthogonal frequency division multiplexing(OFDM) system with decode-and-forward(DF) protocol. In this paper, the system objective is minimize the total energy cost of the source and the relay. Then optimal resource allocation method based on dual decomposition is presented to resolve the system model. Simulations show that the proposed method not only prolong the network lifetime, but also send more data than other algorithms.