Uplink NOMA for Heterogeneous NTNs with LEO Satellites and High-Altitude Platform Relays
Uplink NOMA for Heterogeneous NTNs with LEO Satellites and High-Altitude Platform Relays
复制标题
具有 LEO 卫星和高空平台中继的异构 NTN 的上行链路 NOMA
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
D. Love
中科院分区：
文献类型：
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作者：
M. Bliss;F. J. Block;IV ThomasC.Royster;D. Love
开发了一种上行链路非正交多址通信系统，用于使用低地球轨道(LEO)卫星星座和高空平台(HAP)作为具有混合自动重发请求能力的中继站的异类非地面网络(NTN)。该系统被设计为一个随机接入和抗干扰的网络，以支持低速率用户。所有上行链路传输(无论发射机是用户终端还是HAP)都使用公共波形和频带。理论和基于仿真的性能分析结果都是存在干扰的信道的用户发射功率和分组到达率的函数。与直接传输到低轨卫星相比，HAP中继的使用显著提高了吞吐量并减少了队列大小，特别是在高干扰环境中的低功率用户的情况下。
An uplink non-orthogonal multiple-access communication system is developed for heterogeneous non-terrestrial networks (NTNs) that employ both low-Earth orbit (LEO) satellite constellations and high-altitude platforms (HAPs) as relays with hybrid automatic repeat request capabilities. The system is designed as a random-access and interference-resistant network to support low-rate users. A common waveform and frequency band is used for all uplink transmissions (whether the transmitter is a user terminal or a HAP). Both theoretical and simulation-based performance analysis results are provided as a function of user transmit power and packet arrival rates for channels with interference. The use of HAP relays is shown to significantly improve throughput and reduce queue size relative to direct transmission to the LEO satellites, especially for the case of low-power users in high interference environments.