卫星移动业务与地面固定业务共用分析系统

由原国家无线电频谱管理研究所组织研究开发的这套卫星移动业务与地面固定业务共用分析系统是由文档管理模块、共用分析模块、数据库管理模块、查看模块及帮助模块五大功能模块组成，每个功能模块又由若干个子模块组成，各个模块间的关系见图1。一、各功能模块介绍1．文档模块该模块包括九部分。他们分别是：新建、查看结果、保存、另存为、打印、打印预览，打印设置、最近文件及退出。新建：它为进行共用分析提供输出结果，无论是进行协调分析还是进行详细计算之前应先选择此菜单，这时在菜单正上方应显示“无标题”，此时可以进行共用分析…     

卫星信号地面接收干扰的解决方案探讨

简要介绍了卫星信号地面接收受干扰时的解决思路,着重介绍了几种异地接收回传方案,给出了系统原理结构框图及该方案的优缺点.     

调频广播与航空无线电业务A类干扰分析方法

本文描述了调频广播业务与航空无线电业务之间干扰的现状以及目前相关研究机构对两种业务间电磁兼容分析的研究情况。文章以国际电联ITURSM．10091建议书为理论基础，分析了调频广播与航空无线电业务电磁兼容A类干扰产生机理，根据A类干扰是广播多信号互调产生实际电波干扰的特点给出了A类干扰电磁兼容分析的计算方法，并根据场强及保护率等相关参数推导出防护距离，进一步简化了分析流程。     

微波对卫星地面接收站的干扰及对策

我国卫星转播下行频率采用Ｃ波段。而国内地面微波传送也采用Ｃ波段，特别是在高波段３８００ＭＨｚ～４２００ＭＨｚ和卫星使用的３７００ＭＨｚ～４２００ＭＨｚ几乎重合。这就必然会出现微波和卫星地面接收相互干扰的问题。对于微波中继站和卫星地面接收站相互靠近的电视转播台相互干扰的机会就更多些。本文较详细地分析了开鲁县电视转播台卫星地面接收站受微波干扰的情况以及排除干扰的办法。     

卫星移动业务C频段的干扰研究

分析了卫星移动业务与地面固定业务共用C频段时,对该频段地面固定业务的干扰情况。以世界无线电通信大会议题提出的卫星移动业务候选频段为背景,从理论上分析了卫星移动系统上行链路与下行链路对固定业务的干扰情况。利用国际电联相关建议搭建了干扰分析模型,并进行了仿真分析。通过分析,在假设的场景下,卫星移动业务的上行链路会对地面固定业务产生干扰,而上行链路不会产生干扰。     

调频广播与航空无线电业务B1类干扰分析方法

描述了调频广播与航空导航业务之间干扰的现状、产生原因及电磁兼容分析的研究情况。以国际电联ITU-R SM.1009-1建议书为理论基础,介绍了B1类干扰的定义及产生机理,根据建议书提供的B1类干扰兼容性评估标准及通用估算方法,提出了B1类干扰最大防护距离及等值线的兼容分析方法,并给出了用该方法进行B1类干扰分析的详细步骤和流程,分析人员可根据等值线对B1类可能的干扰区域进行预测。     

低轨卫星物联网与地面物联网间同频干扰研究

文章侧重于低轨卫星物联网与地面物联网间同频干扰问题,首先分析了相关的干扰场景,其次介绍了对应的干扰方法,包括上行干扰和下行干扰方法,最后进行了仿真结果分析,包括上行干扰仿真结果和下行干扰仿真结果,希望能给相关人士提供有效参考.     

一种减少地面微波干扰的卫星接收天线

Miralite公司生产了一种TI型C波段天线,直径为3.7米,其特点是在抛物面的边缘处安装一个屏蔽圈(见下图),圈内装有一种特殊配方的微波共振吸收材料,以吸收地面干扰信号,圈表面涂有一层耐紫外线的     

移动通信基站对卫星固定业务的干扰分析

随着近年来5G网络建设的快速发展,由于其分配频率与卫星固定业务(FSS)标准C波段频率相邻,从而导致移动通信基站对卫星信号接收造成干扰的案例时有发生.本文从几种常见的移动通信基站干扰类型出发,对其成因、现象和排除的措施加以阐述,对解决相应干扰问题具有一定的参考价值.     

Rainfall scatter interference between terrestrial and satellite radio-links

The effect of scattering by rain on the interference between terrestrial and satellite radio links is examined. The important role played by rain attenuation inside and outside the common volume is evident from the comparison between experimental and theoretical results. For higher rain intensities, the experimental results are in good agreement with those calculated, but for lower intensities the calculated results underestimate the phenomena.     

Interference considerations in frequency sharing between low earth orbit satellites and the geostationary fixed satellite and terrestrial service

Recently many companies and consortia have considered launching LEO satellites for such projects as remote sensing, transportation and mining operations. When the multiple low Earth orbit (LEO) satellites are transmitting they can interfere with existing terrestrial microwave and satellite earth-stations in the fixed and mobile service. The interference problem is related to the number of proposed LEOs and the altitude and consequently the time to orbit the earth. These systems usually consist of many small satellites, and each satellite stays in the beam of a terrestrial station for up to 72 seconds in each 222 minute orbit. Earth coverage could be obtained by 48 (LEO) satellites 1500 km above the earth in polar orbit, and hence at least one LEO would always be interfering with terrestrial networks. A technical evaluation would then be required to determine the resultant BER (bit error rate) effecting existing terrestrial services. A determination can then be made to support such a LEO system or object via official channels such as the ITU.     

Intersegment handover between terrestrial and satellite segments:analysis and performance evaluation through simulation

In future generation communication systems, integration among different segments (terrestrial indoor, terrestrial outdoor and satellite) will be necessary if aiming at providing real global and contiguous coverage without interruption. To achieve integrated or interworking systems efficient algorithms to perform intersegment handover (ISHO) must be implemented. In this way, the switching among different segments can occur without dropping of the call. The paper aims at analyzing some ISHO procedures developed in the frame of some European projects and at evaluating their performance for different system configurations utilizing a dynamic constellation simulator in the time domain. On the basis of the above procedures, aiming at optimizing resources, a new procedure is proposed and analyzed. For each procedure the execution delay and its range of variation have been evaluated for different constellation geometry. Finally, a performance comparison among the various procedures is shown     

Interference between terrestrial line-of-sight radio-relay systems and communication-satellite systems

A graphical method for obtaining transfer factors for interference problems involving wide-deviation frequency-modulated satellite systems is extended to problems involving interference between line-of-sight radio-relay systems and unloaded and undispersed satellite systems. Interference problems involving single-sideband amplitude-modulated systems are also considered.     

卫星地球站上行干扰的排查与分析

0.前言 某卫星地球站（下文中简称“本站”）装有使用亚太6号C频段转发器的TES远端站设备、使用鑫诺1号卫星C频段转发器的TES远端站和PES远端站设备,以及使用亚洲4号卫星Ku频段转发器的TDMA设备。     

Interference between satellite systems in non-geostationary orbits

Satellites are considered in arbitrary orbits, and interference between them and other satellites or earth-stations is calculated. The composite interference from a complete system is found by summing over the set of visible satellites. One starts with the Keplerian orbital parameters and assumed antenna patterns and transmitter characteristics. Using classical orbital mechanics and a series of co-ordinate transformations, one determines the location of any satellite in the frame of reference of any other satellite or earth-station. Conventional interference methods are then used to find the result.     

Hybrid satellite and terrestrial networks

The role of satellite communications in networks that provide new services, such as frame relay and multimedia, is investigated. Both passive and active (on-board switching/processing) satellite systems are considered. Novel techniques are developed for each system to demonstrate, via detailed analysis and simulation, how the communications bandwidth agility of multipoint/broadcast satellite channels, and the on-board switching/processing, makes it feasible to provide these new services via hybrid satellite and terrestrial networks in a resource-efficient manner.     

车载平台上天线间的干扰分析

车载平台空间狭小,将多部、多种工作模式的电台装在同一车辆上,将会带来严重的电磁兼容问题（EMC）。主要介绍了车载平台上天线间的耦合干扰,以及耦合度的概念。通过HFSS软件的仿真,对天线布局的变化,包括天线间的距离、高度、方向的变化,通过仿真,观察其耦合度的变化情况。得出有效的相关结论,这些结论将在实际工程应用中对天线的布局有一定的指导意义。     

星地一体化通信系统同频干扰统计分析

星地一体化通信系统中,卫星网络与辅助地面网络共用一段频率,这有利于提高系统频谱效率,但也带来了系统内同频干扰。为了更加准确地计算同频干扰,利用Wilkinson方法将大量干扰源等效为单一干扰源,建立了等效干扰源的统计模型计算同频干扰概率。     

低轨卫星通信系统干扰分析及策略研究

卫星通信技术日益进步,低轨卫星通信系统已然成为新的发展趋势.由于频谱资源受限,低轨卫星通信系统可能面临自身及与外部地面和卫星系统的同频干扰问题.文章指出从外部系统对低轨卫星通信系统干扰、低轨卫星通信系统对外部系统干扰以及低轨卫星通信系统内部干扰3个方面进行了系统干扰场景分析,在此基础上,根据不同的干扰情况分别给出了外部...