摘要
在星地无线电频率/激光波长共享的背景下,分别针对6 GHz以下频率无线电通信以及自由空间激光通信,研究了低轨卫星(LEO)受到的国际移动通信系统地面基站的集总干扰。其中针对6 GHz以下频率,根据最新的国际电信联盟(ITU)建议书构建了不同的典型国际移动通信(IMT)地面基站部署场景。使用蒙特卡洛仿真引入了统计性质的地物损耗模型,分析了其适用性,并用于随机性细化场景仿真。通过典型场景设计结合低轨卫星多波束天线特性,仿真得到IMT地面集总干扰在不同场景、不同卫星天线波束指向下干扰的变化趋势。研究结果表明在基站天线高度低于屋顶线时,地物损耗不容忽略。另一方面,针对地面自由空间光通信对卫星产生的干扰,通过链路计算分析了可能的干扰情况。研究结果对监测低轨卫星通信接收环境具有理论指导意义和应用价值。
In the context of satellite terrestrial radio frequency/laser wavelength sharing,this paper studies the aggregate interference of International Mobile Telecommunication System(IMT)terrestrial stations that is imposed to the low earth orbit(LEO)satellites equipped with the multi-beam receiving antenna for radio communication with frequencies below 6 GHz and free-space laser communications.For frequencies below 6 GHz,typical kinds of IMT base station deployment scenarios were emulated according to the latest International Telecommunication Union(ITU)Recommendations.By means of Monte Carlo simulation,a statistical clutter loss model was introduced into the interference simulation.The model’s applicability was analyzed,and it was used for the random detailed scene simulation.After combining the typical scenarios with the characteristics of the satellite multi-beam antennas,we study the change trends of the different typical base station deployment scenarios with the different satellite antenna beam scanning angels by simulations.The results show that when the height of base station antenna was below rooftop,the clutter loss should not be neglected.On the other hand,we analyze the possible interference of the terrestrial free-space optical communication imposed to the LEO satellite by link calculation.The analysis results have theoretical guiding significance and application value for monitoring the receiving environment of LEO satellites.
作者
施艳
谢卓辰
刘会杰
Shi Yan;Xie Zhuochen;Liu Huijie(Innovation Academy of Microsatellites of CAS,Shanghai 200120,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 200120,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第3期124-131,共8页
Laser & Optoelectronics Progress
基金
自然科学基金重大研究计划重点支持项目(91738201)。
关键词
频谱分析
低轨卫星
同频干扰分析
地物损耗模型
国际移动通信系统
自由空间光通信
spectrum analysis
low earth orbit satellites
co-channel interference analysis
clutter loss model
international mobile communication system
free-space optical communication