全双工双向中继系统的功率分配方案

Power allocation schemes for full-duplex two-way relay systems

提出了最大化系统的频谱效率(SE)和能量效率(EE)两种功率分配方案.EE优化问题用迭代算法求解,首先运用分式规划的方法把优化问题转变成易求解的非分式优化问题,然后运用Dinkelbach算法求得用户节点的最佳功率,再运用一维搜索求得最佳中继放大系数,最后利用迭代算法求得EE最大值.SE优化问题同样用迭代算法求解.仿真结果显示,针对不同目标函数的两种功率分配方案分别提高了系统的EE和SE,同时迭代算法能够快速收敛获得最优解.

Two power allocation schemes are presented to maximize SE and EE respectively.An iterative algorithm is used to solve the EE optimization problem.Firstly,the EEoptimization problem is transformed into a tractable non-fractional one by using the fractional programming method,and then the Dinkelbach algorithm is used to obtain the optimal power of the users,and then one-dimensional search is used to obtain the best relay amplification factor,and finally an iterative algorithm is used to maximize EE.SE optimization problem is also solved bythe iterative algorithm.The simulation results show that the two power allocation schemes aimed at different objective functions improve the EE and SE of the system respectively,and the iterative algorithm can converge quickly to obtain the optimal solution.