基于平流层飞艇的星地中继通信系统设计
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摘要
针对高轨卫星对地激光链路受大气层影响较大,难以全天候工作的现状,设计了一种利用平流层飞艇平台对激光链路进行中继的通信系统,将激光终端升空到平流层降低大气层影响,采用高速微波实现飞艇平台到地面的信息中继,可以实现5Gbit·s-1以上的可靠信息传输。对激光载荷安装、微波链路预算以及天线对准等进行了分析,总结了随机运动特性平台高精度指向和快速捕获、大幅度低频扰动特性下高精度稳定、大容量微波高速自适应均衡等关键技术,可以满足高速中继的需求。
In view of the fact that the high-orbit satellite-to-ground laser link is greatly affected by the atmosphere and it is difficult to work in all weather conditions. In this work, a communication system that uses the stratospheric airship platform to relay the laser link is desigened. A laser communication device is lifted to the stratosphere to reduce the influence of the atmosphere and a high-speed microwave device is used to realize information relay of the airship platform to the ground, which can achieve reliable information transmission more than 5 Gbps. The laser load installation, microwave link budget and antenna alignment are analyzed. The key points of high-precision pointing,fast capture of random motion platform characteristics, high-precision stability under large low-frequency disturbance characteristics and high-speed adaptive equalization of high-capacity microwave are summarized which results in meeting the needs of high-speed relay requirement.
In view of the fact that the high-orbit satellite-to-ground laser link is greatly affected by the atmosphere and it is difficult to work in all weather conditions. In this work, a communication system that uses the stratospheric airship platform to relay the laser link is desigened. A laser communication device is lifted to the stratosphere to reduce the influence of the atmosphere and a high-speed microwave device is used to realize information relay of the airship platform to the ground, which can achieve reliable information transmission more than 5 Gbps. The laser load installation, microwave link budget and antenna alignment are analyzed. The key points of high-precision pointing,fast capture of random motion platform characteristics, high-precision stability under large low-frequency disturbance characteristics and high-speed adaptive equalization of high-capacity microwave are summarized which results in meeting the needs of high-speed relay requirement.
引文
[1]中国信息与电子工程科技发展战略研究中心.中国电子信息工程科技发展研究(综合篇)[M].北京:科技出版社,2017:65-89.
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[4]孙震强.一种基于平流层高空平台的5G广覆盖解决方案[J].移动通信,2018,42(9):28-31.
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[9]李小明,张立中,孟立新,等.机载无线激光通信对准-捕获-跟踪系统及动态飞行试验研究[J].兵工学报,2016,37(6):1044-1051.
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[2]姜会林,安岩,张雅琳,等.空间激光通信现状、发展趋势及关键技术分析[J].飞行器测控学报,2015,34(3):207-217.
[3]曾智龙,刘兴,孙晖,等.空间激光通信最新进展及发展建议[J].光通信技术,2017,41(6):1-5.
[4]孙震强.一种基于平流层高空平台的5G广覆盖解决方案[J].移动通信,2018,42(9):28-31.
[5]丁平,杨健.临近空间飞行器在空间通信中的应用[J].科技信息,2010(32):419-420.
[6]吴俊晨,任文成.高空平台无线通信系统设计[J].无线电通信技术,2013,39(1):16-18.
[7]潘可臻.临近空间空地信道雨衰模型研究[D].重庆:重庆大学,2018.
[8]管明祥,郭庆,顾学迈.HAPS通信覆盖及链路特性分析[J].电波科学学报,2012,27(4):832-839.
[9]李小明,张立中,孟立新,等.机载无线激光通信对准-捕获-跟踪系统及动态飞行试验研究[J].兵工学报,2016,37(6):1044-1051.
[10]管明祥,郭庆,顾学迈.高空平台不稳定性对HAPS通信性能影响建模与分析[J].电子学报,2012,40(10):1948-1953.