Joint power allocation and cooperative analog beamforming for ultra‐dense low Earth orbit satellite constellation networks
Joint power allocation and cooperative analog beamforming for ultra‐dense low Earth orbit satellite constellation networks
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DOI：
10.1002/sat.1438
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发表时间：
2021-11
影响因子：
1.7
通讯作者：
Jianfei Tong;Cheng Wang;Xiaoyan Zhao;Gaofeng Cui;Weidong Wang
中科院分区：
文献类型：
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作者：
Jianfei Tong;Cheng Wang;Xiaoyan Zhao;Gaofeng Cui;Weidong Wang
研究了全频率复用的超密集低轨卫星星座网络下行多组组播传输问题。与点对点传输相比，多播传输显著提高了系统性能。然而，组播容量受到每个组中瓶颈用户的信号干扰噪声比（SINR）的限制。针对这一问题，提出了一种基于交替优化的联合功率分配和协作波束形成算法（AO-JPACB），以提高瓶颈用户的信干噪比，提高系统容量。仿真结果表明，AO-JPACB算法与单星方案相比，能够提高系统容量。
In this paper, downlink multigroup multicast transmission in the ultra‐dense low Earth orbit satellite constellation networks with full frequency reuse is studied. Multicast transmission significantly improves the system performance compared with point‐to‐point transmission. However, multicast capacity is constrained by the signal to interference and noise ratio (SINR) of bottleneck users in each group. To tackle this problem, we propose an alternating optimization‐based joint power allocation and cooperative beamforming algorithm (AO‐JPACB) to enhance the SINR of the bottleneck users and improve the system capacity. Simulation results show that the proposed AO‐JPACB algorithm can improve the system capacity compared to single‐satellite schemes.