论文标题
通过多播Fronthaul为C-RAN的联合波束形成和功率拆分设计
Joint Beamforming And Power Splitting Design For C-RAN With Multicast Fronthaul
论文作者
论文摘要
在本文中,我们研究了基于多播Fronthaul的基于基于群集的云无线电访问网络(C-RAN)中的联合波束形成和电源分裂设计问题,在每个集群中,BSS共同为用户提供了用户。同时,每个用户可以同时从接收的信号中获取信息和能量。在此基础上,在每个用户的预定义最小收获能量下,每个BS和中央处理器的最大发射功率,我们通过共同优化多播fronthaul横梁成形,合作访问范围和功率分配比例来提出总和速率最大化问题。由于难以解决法式问题,我们首先通过连续的凸近近似和半决赛程序(SDP)放松技术将其转换为凸形问题,然后提出有效的迭代算法。此外,我们设计了一种随机化方法,该方法始终可以获得排名一的解决方案。最后,进行数值结果以验证我们提出的算法的有效性。
In this paper, we investigate the joint beamforming and power splitting design problem in a base station (BS) cluster-based cloud radio access network (C-RAN) with multicast fronthaul, where users are jointly served by BSs within each cluster. Meanwhile, each user can simultaneously obtain information and energy from received signals. On this basis, under predefined minimum harvested energy of each user and maximum transmit power of each BS and central processor, we formulate a sum rate maximization problem by jointly optimizing multicast fronthaul beamforming, cooperative access beamforming and power split ratios. Due to the difficulty in solving the formulated problem, we first transform it into a convex one by successive convex approximate and semidefinite program (SDP) relaxation techniques, and then propose an effective iterative algorithm. Moreover, we design a randomization method that can always obtain the rank-one solution. Finally, numerical results are conducted to validate the effectiveness of our proposed algorithm.