【摘要】 基于系统和速率最大化,对非正交多址系统中用户分组及功率分配进行研究。针对用户分组算法,根据用户的信道增益提出一种新的低复杂度的分组方法。并且,为了控制解码的时延与复杂度,每个子信道至多分配2个用户。对于功率分配,采用能够快速收敛的粒子群优化算法,获得目标问题的最优解。经过仿真显示,提出的用户分组和功率分配方案能够显著提高系统和速率。更多还原

【Abstract】 In this paper, the system rate are taken as the target, and the user clustering and power allocation schemes are studied in NOMA(Non-orthogonal multiple access, NOMA).For user clustering, This paper proposes a new low-complexity user clustering method according to the user channel gain, and in order to control the decoding delay and complexity which allocates at most two users per subchannel.For power allocation, This paper quotes the ideology of PSO(particle swarm optimization, PSO).It can fastly converge and find the optimal solution of the target problem.Simulation results show that the proposed user clustering and power allocation plan is better than the traditional method.更多还原