| 可重构全息超表面辅助卫星通信关键技术 |
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| 引用本文： | 胡馨元,邓若琪,邸博雅,张泓亮,宋令阳.可重构全息超表面辅助卫星通信关键技术[J].电信科学,2022,38(10):46-56. |
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| 作者姓名： | 胡馨元 邓若琪 邸博雅 张泓亮 宋令阳 |
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| 作者单位： | 1. 北京大学电子学院，北京 100871;2. 鹏程实验室，广东 深圳 518055 |
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| 基金项目： | 国家重点研发计划项目(2020YFB1804800);国家自然科学基金资助项目(62271012);国家自然科学基金资助项目(6194110);北京市自然科学基金资助项目(L212027);北京市自然科学基金资助项目(4222005) |
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| 摘 要： | 超密集低地球轨道卫星通信网络能弥补传统地面网络频谱资源稀缺、覆盖范围有限的不足，有潜力提供全球大规模接入的高速率服务。由于卫星的高速移动性，卫星通信对天线性能，如波束控制能力和天线增益等，也提出了更为严苛的要求。因此，对一种新型的超材料天线——可重构全息超表面（reconfigurable holographic surface，RHS）辅助卫星通信展开了研究。RHS采用全息原理对超材料单元进行电控，从而实现波束成形。基于 RHS 的硬件结构和全息工作原理，提出了一种 RHS 辅助多卫星通信方案，该方案同时考虑卫星跟踪和数据传输。同时，设计了全息波束成形优化算法以最大化和速率。仿真结果验证了所提方案的有效性并表明了相较于传统相控阵天线，RHS提供了一种成本效益更高的卫星通信支持方式。
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| 关 键 词： | 可重构全息超表面 全息波束成形 低轨卫星通信 |
Key technologies of satellite communications aided by reconfigurable holographic surfaces |
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| Xinyuan HU,Ruoqi DENG,Boya DI,Hongliang ZHANG,Lingyang SONG.Key technologies of satellite communications aided by reconfigurable holographic surfaces[J].Telecommunications Science,2022,38(10):46-56. |
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| Authors: | Xinyuan HU Ruoqi DENG Boya DI Hongliang ZHANG Lingyang SONG |
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| Affiliation: | 1. School of Electronics, Peking University, Beijing 100871, China;2. Peng Cheng Laboratory, Shenzhen 518055, China |
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| Abstract: | Ultra-dense low earth orbit (LEO) satellite communication networks can overcome the scarcity of spectrum resources and the limited coverage of traditional terrestrial networks, and thus have the potential to provide high data rate services and global massive connectivity for terrestrial users.However, due to the high mobility of the satellites, LEO satellite networks put more stringent requirements on antenna technologies in terms of accurate beam steering and high antenna gain.Reconfigurable holographic surface (RHS), as a new type of metamaterial antenna, is investigated to assist LEO satellite communications.The RHS can electronically control the metamaterial units by leveraging the holographic principle to generate desired directional beams.Based on the hardware structure and holographic working principle of RHS, an RHS-assisted multi-satellite communication scheme was proposed, which considered both the LEO satellite tracking scheme and the data transmission scheme.A holographic beamforming optimization algorithm was also designed to maximize the sum rate.Simulation results verify the effectiveness of the proposed scheme and demonstrat that the RHS provids a more cost-effective way to support satellite communications than the conventional phased array antennas. |
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| Keywords: | reconfigurable holographic surface holographic beamforming LEO satellite communication |
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