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非静止轨道卫星星座系统功率通量密度包络的计算方法 被引量:3
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作者 张晓燕 刘畅 +1 位作者 李明明 李伟 《电波科学学报》 CSCD 北大核心 2021年第5期747-754,共8页
新兴的非静止轨道(non-geo stationary orbit, NGSO)卫星星座由成百上千颗NGSO卫星编队组成,具有高动态的空间、时间、频谱、编码等多维一体特性,必然会对其他无线电系统(业务)带来时变的频率干扰问题,本文主要解决如何计算NGSO卫星星... 新兴的非静止轨道(non-geo stationary orbit, NGSO)卫星星座由成百上千颗NGSO卫星编队组成,具有高动态的空间、时间、频谱、编码等多维一体特性,必然会对其他无线电系统(业务)带来时变的频率干扰问题,本文主要解决如何计算NGSO卫星星座系统下行链路的最大辐射能量问题.在ITU-R S.1503-3的计算框架下,通过引入卫星天线实际发射增益、波束配置与覆盖、用户点处最小隔离角的计算以及简化计算步骤等,给出了NGSO卫星星座系统功率通量密度(power-flux-density,PFD)包络的通用计算方法以及一个计算示例.通过分析可知,对所要仿真系统的各项参数,尤其是系统的切换策略、干扰规避或减缓策略等了解得越详细,得到的仿真结果就会越接近系统工作的真实值.本文的方法可用于计算任何NGSO卫星网络的PFD包络,以便参与下行等效PFD的计算. 展开更多
关键词 非静止轨道(NGSO)卫星 卫星星座系统 功率通量密度(pfd)包络 卫星固定业务 离散点
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非静止轨道广播卫星系统IMT-2000干扰分析
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作者 周猛 凃国防 谢飞波 《电波科学学报》 EI CSCD 北大核心 2008年第6期1100-1105,共6页
由于非静止轨道广播卫星系统NGSO-BSS与第三代移动通信系统IMT-2000的使用频段部分重叠,因此会产生系统间干扰,导致IMT-2000系统性能下降。为保证两系统共存,以日本拟发送的非静止轨道广播卫星系统为背景,建立了卫星系统对地面移动通信... 由于非静止轨道广播卫星系统NGSO-BSS与第三代移动通信系统IMT-2000的使用频段部分重叠,因此会产生系统间干扰,导致IMT-2000系统性能下降。为保证两系统共存,以日本拟发送的非静止轨道广播卫星系统为背景,建立了卫星系统对地面移动通信系统的干扰模型,用于分析该系统干扰地面同频段IMT-2000导致的上下行覆盖损失,并以此给出了能够保护IMT-2000系统的有效卫星发射PFD限值。 展开更多
关键词 pfd限值 IMT-2000 非静止轨道广播卫星系统 频谱共享 干扰门限
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Overview of development and regulatory aspects of high altitude platform system 被引量:4
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作者 Dong Zhou Sheng Gao +2 位作者 Ruiqi Liu Feifei Gao Mohsen Guizani 《Intelligent and Converged Networks》 2020年第1期58-78,共21页
High Altitude Platform(HAP)systems comprise airborne base stations deployed above 20 km and below 50 km to provide wireless access to devices in large areas.In this paper,two types of applications using HAP systems:on... High Altitude Platform(HAP)systems comprise airborne base stations deployed above 20 km and below 50 km to provide wireless access to devices in large areas.In this paper,two types of applications using HAP systems:one with HAP Station(HAPS)and the other with HAPS as International Mobile Telecommunication(IMT)Base Station(HIBS)are introduced.The HAP system with HAPS has already received wide recognition from the academia and the industry and is considered as an effective solution to provide internet access between fixed points in suburban and rural areas as well as emergencies.HAP systems with HIBS to serve IMT user terminal have just started to draw attention from researchers.The HIBS application is expected to be an anticipate mobile service application complementing the IMT requirement for cell phone or other mobile user terminals in which the service field of HAPS application cannot reach.After describing and characterizing the two types of systems,coexistence studies and simulation results using both the Power Fluxed Density(PFD)mask and separation distance based methods are presented in this paper.This paper also predicts future trends of the evolution paths for the HAP systems along with challenges and possible solutions from the standpoint of system architectures and spectrum regulation. 展开更多
关键词 High Altitude Platform(HAP)system HAP Station(HAPS) International Mobile Telecommunication(IMT) HAPS as IMT Base Station(HIBS) Power Fluxed Density(pfd)mask separation distance
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