面向星地融合网络的低轨卫星多波束成形技术  

Beamforming Technology of LEO Satellite in Satellite-Terrestrial Integrated Network

作　　者：罗志勇 辛宁[3,4] 孙韶辉 LUO Zhiyong;XIN Ning;SUN Shaohui(School of Electronics and Communication Engineering,SUN YAT-SEN UNIVERSITY,Guangzhou 518107,China;Pengcheng Labatory,Shenzhen 518055,China;Institute of Telecommunication and Navigation Satellites,CAST,Beijing 100094,China;Innovation Center of Satellite Communication System,CNSA,Beijing 100094,China;Datang Mobile Communication Equipment Co.,Ltd.,Beijing 100083,China)

机构地区：[1]中山大学电子与通信工程学院,广东广州518107 [2]鹏城实验室,广东深圳518055 [3]中国空间技术研究院通信与导航卫星总体部,北京100094 [4]国家航天局卫星通信系统创新中心,北京100094 [5]大唐移动通信设备有限公司,北京100083

出　　处：《天地一体化信息网络》2022年第4期22-30,共9页Space-Integrated-Ground Information Networks

基　　金：国家重点研发计划资助项目(No.2021YFB2900503,No.2021YFB2900401,No.2021YFB2900200)。

摘　　要：由于星地链路与地面传播损耗特性之间的差异,卫星通信系统的频谱效率指标远低于同期的地面蜂窝系统。多波束天线技术能够实现更高效的空分复用,是提升低轨卫星通信系统频谱效率的重要手段。研究低轨卫星通信场景下的自适应波束成形及多普勒频移补偿方案。首先,基于混合波束成形架构设计一种低复杂度的波束成形方案;其次,针对多波束系统中由不同波束俯仰角带来的多普勒频移差异,提出一种多波束系统中的多普勒频移预补偿方案;最后,通过MATLAB仿真分析验证算法的有效性。Because of the difference between satellite-ground link and ground propagation loss characteristics,the spectrum efficiency index of satellite communication system is far lower than that of terrestrial cellular system in the same period.It is of utility to improve spectral efficiency by realizing efficient space division multiplexing with multi-beam antennas.The adaptive beamforming and doppler frequency offset compensation scheme in the LEO multi-beam satellite communication scenario was studied.Firstly,a low-complexity hybrid beamforming scheme was designed.Then,aim at the doppler frequency shifts were different between beams due to their pitch angles,a doppler frequency offset pre-compensation scheme for multi-beam systems was proposed.Finally,the effectiveness of the algorithm was verified by MATLAB simulation analysis.

关 键 词：低轨卫星通信 多波束天线 自适应波束成形 大规模多输入多输出 多普勒频移 

分 类 号：TN393[电子电信—物理电子学]