全双工非正交多址接入系统的功率控制

研究了采用全双工基站同时为多个半双工下行用户和上行用户提供服务的单载波非正交多址(single-carrier non-orthogonal multiple access， SC-NOMA)系统的资源分配算法设计。考虑了基于能效的单载波NOMA系统上行链路和下行链路的资源分配问题，在保证用户服务质量和功率约束的同时最大化全双工单载波非正交多址接入(Full-duplex single-carrier orthogonal multiple access， FD SC-NOMA)系统的能效。由于目标函数是非凸问题，将原问题转换成非线性分式规划问题，通过采用拉格朗日乘子法得到最优传输功率的闭式解，利用次梯度算法求得最优传输功率。仿真结果表明，与传统的半双工单载波非正交多址接入(half-duplex single-carrier orthogonal multiple access， HD SC-OMA)系统相比，FD SC-NOMA系统能够实现更优的能效。

Power control based on energy efficiency for full-duplex non-orthogonal multiple access systems

This paper studies the resource allocation algorithm for a single carrier non-orthogonal multiple access (SC-NOMA) system using a full duplex base station to simultaneously serve multiple half duplex downlink users and uplink users. Considering the resource allocation problem of uplink and downlink in single carrier NOMA system based on energy efficiency, the energy efficiency of FD SC-NOMA system is maximized while ensuring the quality of service and power constraints of users. Since the objective function is a non-convex problem, the original problem is first converted into a nonlinear fractional programming problem, then a closed form solution of the optimal transmission power is obtained by using the Lagrangian multiplier method, and finally a sub-gradient algorithm is used to obtain the optimal transmission power. Simulation results show that compared with the traditional half duplex single carrier orthogonal multiple access (HD SC-OMA ) system, the FD SC-NOMA system can achieve better energy efficiency.