面向宽带LEO星座卫星通信系统星座的轨道高度与边缘通信仰角优化设计

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英文篇名：Optimization Design of Orbital Altitude and Edge Communication Elevation Angle for Broadband LEO Constellation Satellite Communication System 作者：徐军 ; 张更新 ; 边东明 ; 王闯 英文作者：Xu Jun;Zhang Gengxin;Bian Dongming;Wang Chuang;Army Engineering University of PLA;Nanjing University of Posts and Telecommunications; 关键词：宽带卫星 ; 低轨星座 ; 卫星通信 ; 轨道高度 ; 通信仰角 英文关键词：Broadband Satellite;;LEO Constellation;;Satellite Communications;;Orbital Altitude;;Elevation Angle 中文刊名：HBYD 英文刊名：Information & Communications 机构：中国人民解放军陆军工程大学通信工程学院;南京邮电大学通信与信息工程学院; 出版日期：2019-01-15 出版单位：信息通信 年：2019 期：No.193 基金：国家自然科学基金资助项目(No.91738201) 语种：中文; 页：HBYD201901010 页数：5 CN：01 ISSN：42-1739/TN 分类号：31-35

摘要

宽带LEO星座卫星通信系统是当前卫星通信领域重要的发展热点之一,世界许多国家和卫星通信公司都在制定自己的宽带卫星通信系统方案。为适应我国不断扩大的对外交流,同时提前占据空间的轨道和频率资源,有必要依据我国的现实条件建立起一个自己的宽带卫星通信系统。宽带LEO星座卫星通信系统的星座设计与传统的卫星通信系统星座设计不同,宽带LEO星座卫星通信系统需要满足用户的宽带多媒体业务需求,用户使用时要求的传输速率较高,相应对系统的传输容量要求也高,系统能否在用户终端小型化的同时满足用户的通信需求是一个很重要的问题。在高速率传输情况下,低仰角会导致传输损耗增加,进而使卫星或者用户终端天线口径加大,卫星天线口径太大会导致点波束过窄,而低仰角星座卫星单星覆盖面积大,如果采用低仰角方案会使卫星点波束过多,从而增加卫星复杂度,用低成本卫星难以实现,为此需要研究基于高通信仰角的大规模低轨卫星星座设计。文章将在文献的基础上对边缘通信仰角与轨道高度之间的优化设计进行研究,推导出一种约束条件。
        Broadband LEO constellation satellite communication system is one of the most important development hotspots in the field of satellite communication. t is necessary to establish a broadband satellite communication system according to the actual conditions of our country in order to occupy the orbit and frequency resources of space ahead of time. The constellation design of broadband LEO constellation satellite communication system is different from the traditional constellation design of satellite communication system, Broadband LEO constellation satellite communication system needs to meet the broadband multimedia service needs of users, the transmission rate required by users is high, and the corresponding transmission capacity of the system is also high. Whether the system can meet the communication needs of users while the user terminal is miniaturized is a very important issue. At high rate transmission, a low elevation angle result in increased transmission loss. As a result, the antenna aperture of the satellite or the user terminal is enlarged, Satellite antenna aperture is too narrow, and low elevation constellation satellite single satellite coverage area is large. If the low elevation constellation satellite is used, the satellite spot beam will be too much, which will increase the complexity of the satellite. It is difficult to use low-cost satellites, so it is necessary to study large-scale LEO satellite constellation design based on high communication elevation angle. In this paper, the optimal design between the elevation angle of edge communication and the orbital height is studied on the basis of literature, and a constraint condition is deduced.

引文

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