Optimal Power Allocation and Cooperation Partner Selection for Multi-Node Amplify-and-Forward Cooperation Systems
WU Wei-ling · Beijing Youdian Xueyuan xuebao · 2010
The symbol error rate (SER) performance is analyzed for the optimization of amplify-and-forward multi-node cooperative communication systems.Firstly,theory SER is analyzed for the systems.Then,the corresponding low bound (LB) is derived,that will be nearing the theory SER between both low and high signal-to-noise ratio conditions.Finally,algorithms used in optimal power allocation (OPA) and partnership selection for the systems by exploring the LB as cost function are formulated.Theoretical analysis and simulation results show that the OPA outperforms traditional equal power allocation in SER performance.Moreover,the LB will be more nearing the theory SER than existing algorithms especially under low SNR conditions.