论文标题
基于Noma的多光束LEO卫星物联网的强大设计
Robust Design for NOMA-based Multi-Beam LEO Satellite Internet of Things
论文作者
论文摘要
在本文中，我们调查了超出第五代（B5G）多光束低地轨道（LEO）物联网（IoT）网络的大规模访问问题，这是由于通道阶段不确定性（CSI）信息（CSI）传输的存在，从设备通过门户从卫星到卫星。采用新的非正交多访问（NOMA）方案，而不是时间划分多重访问（TDMA）或频分多访问多重访问（FDMA），以支持在非常宽的范围内分布的大型物联网。考虑到LEO卫星上有限的能量，提出了两种针对通道相不确定性的稳健的波束形成算法，以最大程度地减少非关键物联网应用程序和关键物联网应用程序的总功耗。 Thoertical分析和仿真结果都验证了所提出的算法在支持卫星IoT中大量访问的有效性和鲁棒性。
In this paper, we investigate the issue of massive access in a beyond fifth-generation (B5G) multi-beam low earth orbit (LEO) satellite internet of things (IoT) network in the presence of channel phase uncertainty due to channel state information (CSI) conveyance from the devices to the satellite via the gateway. Rather than time division multiple access (TDMA) or frequency division multiple access (FDMA) with multi-color pattern, a new non-orthogonal multiple access (NOMA) scheme is adopted to support massive IoT distributed over a very wide range. Considering the limited energy on the LEO satellite, two robust beamforming algorithms against channel phase uncertainty are proposed for minimizing the total power consumption in the scenarios of noncritical IoT applications and critical IoT applications, respectively. Both thoeretical analysis and simulation results validate the effectiveness and robustness of the proposed algorithms for supporting massive access in satellite IoT.
