| 總結: | Aiming at the problem that the resource allocation methods of Orthogonal Frequency Division Multiple Access(OFDMA) based Decode-Forward(DF) relay system can not take account of both system capacity and user fairness,a new subcarrier and power resource allocation algorithm is proposed.This algorithm is composed of subcarrier allocation and matching and power allocation.In the process of subcarrier allocation and matching,a new synchronous subcarrier difference minimum matching method is designed,which can match the subcarriers of two-hop link pairing to the greatest extent.In the process of power allocation,the power of each subcarrier pair is adjusted by Lagrange method to further improve the transmission rate of the system.Simulation results show that the proposed strategy can give better consideration to both system capacity and user fairness when applied to different OFDMA subcarrier allocation algorithms.
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