OFDM中继系统的传输策略选择与资源分配

Transmission strategy selection and resource allocation in OFDM relay systems

提出传输策略选择结合资源分配的迭代算法,证明其收敛性。进一步将算法简化为顺序进行的三步:子信道指配,传输策略选择和中继的发射功率分配,源的发射功率分配。仿真结果表明,所提资源分配迭代方案和简化方案的频谱效率性能均优于已有的两种资源分配方案,简化方案更适合实际应用。

This paper proposed an iterative algorithm for resource allocations in 0FDM relay systems, whose convergence had been proved. It executed the simplified algorithm in three ordered steps： subchannel assignment, transmission strategy selection and transmit power allocation at the relay, and transmit power allocation at the source. Simulation results show that both the iterative and simplified algorithms outperform the two existing resource allocation schemes. The simplified one is more suitable for practical applications