介绍国内两种车载同步轨道卫星移动通信系统。
Two kinds of vehicle synchronous orbiting satellite mobile communication systems are introduced.
多波束天线技术是卫星移动通信系统中的关键技术之一。
Multi-beam antenna is a key technology in the satellite mobile communication system.
切换是LEO卫星移动通信系统中移动性管理的一个重要组成部分。
Handoff is an important part of mobile management in LEO satellite communication system.
针对具有点波束的低轨卫星移动通信系统，提出了一种信道动态预留策略。
A dynamic channel reserve strategy for LEO communication system with spot-beam is proposed.
低轨卫星移动通信系统自从提出以来就成为全球移动通信系统的一个重要分支。
LEO satellite mobile communication system has become an important branch of global mobile communications system since it proposed.
为了降低卫星移动通信系统对地面移动通信系统的依赖，系统必须引入星际链路。
To reduce the LEO satellite mobile communication systems rely on ground mobile communication system, LEO satellite mobile communication systems must be introduced ISLs.
星座设计是卫星移动通信系统设计一个非常关键的内容，直接关系到系统的性能与成本。
Constellation design is one of the key contents for the design of satellite communications system.
低轨卫星移动通信系统中，高效的位置管理方案可以降低系统开销并且能够保证网络系统的性能。
The excellent location management scheme can reduce the system cost and improve the performance of the Low Earth Orbit Satellite Mobile Communication system.
在MEO卫星移动通信系统中，确定小区驻留时间分布对于合理地规划切换策略具有十分重要的意义。
In MEO satellite mobile communication systems, the confirmation of cell dwell duration' s distribution is very important to constitute handoff str ategies properly.
针对低轨卫星移动通信系统用户在多星覆盖的情况下的位置注册问题，提出了仰角和覆盖时间加权策略。
In LEO satellite network, MTs are always covered by more than one satellite simultaneously. A satellite selection strategy for the MT to register its location is presented in this paper.
终端位置更新速率又是卫星通信系统终端位置管理的重要指标，直接影响到海上卫星移动通信系统的性能。
Terminal location update rate (LUR) is a very important index of Marine satellite mobile communication system, which affects the performance of whole system violently.
仿真结果表明，该方法可以有效减小天线波束指向漂移，满足卫星移动通信系统对天线波束指向精度的要求。
Simulation results show that the method can reduce the excursion of beam pointing effectively, and the requirement of beam pointing accuracy for SOTM can be satisfied.
该软件界面友好，具有丰富的地图操作内容，是军用及民用卫星移动通信系统星座设计仿真、演示的有效工具。
This software has interfaces friendly and a lot of map operations. It is good for the constellation design, simulation and demo of mobile satellite communications system in military or in civil USES.
本文通过对比地面移动通信系统和低轨卫星移动通信系统，为低轨卫星通信系统设计了一种呼叫接入控制策略。
This paper compares the ground mobile communication system and LEO satellite mobile communication system, then designs a CAC for LEO satellite communication system.
阐述了卫星通信的概况以及卫星移动通信系统的分类，重点介绍了低轨卫星移动通信系统的组成及其关键技术。
The satellite mobile communication system, which is the emphasis of the academic research, is the most significant portion of the 3G communication system.
为了提高移动通信系统的容量和效率、实现全球无缝覆盖，必须实现低轨卫星移动通信系统与地面通信系统之间的有机综合。
It is necessary to integrate the LEO satellite communication systems and terrestrial mobile communication systems for improving the capacity and efficiency, achieving global seamless coverage.
通过对现有的卫星移动通信系统星间链路的分析发现，不但卫星移动通信系统星间链路的指向具有周期性变化的特性，而且星间链路的相对距离也在周期性变化。
Through the analysis of today's mobile satellite communication systems, it is found that not only the direction, but also the relative distance of the ISL are periodical.
本文简要介绍了国际海事卫星通信系统(INMARSAT)，重点对该系统的移动数据通信业务及其应用进行了探讨。
This paper gives a brief introduction on the INMARSAT system with the mobile data communication service of the system and its application being discussed in detail.
本文阐述陆地移动卫星通信系统(LMSS)及其信道传输的性能和特点。
The paper introduces the land mobile satellite communication system (LMSS) and its channel transmission performance and features.
国际移动卫星通信系统为用户提供广泛的和日益增加的语音频带数据和传真业务。
The Inmarst system offers the user a large and growing range of voice band data and facsimile services.
某些移动卫星通信天线自动跟踪系统采用激光陀螺进行跟踪，但激光陀螺跟踪有其不足之处。
A new method, gadient algorithm, is put forward to replace the laser gyroscope for the antenna autotracking system of the mobile satellite communication earth station.
扩频技术在数字蜂窝移动通信系统、卫星移动通信、室内无线通信和未来的个人通信中被广泛采用。
Spread Spectrum technique is widely used in digital cell-phone mobile communication system, satellite mobile communication, inside wireless communication and future personal communication.
分析了将移动IP技术应用于星座卫星通信系统的优势及直接使用的缺陷，指出引入相关扩展技术的必要性。
This paper first analyses the benefits and shortages of immediately using Mobile IP into a constellation satellite communication and then points out that using its spreading technology is necessary.
多信道共用技术已经广泛应用于卫星通信、移动通信、以及其它类型的通信系统。
The multi-channel sharing technique has already been widely applied to communication field such as satellite communication, mobile communication and other type of communication systems.
本文介绍全球星低轨移动卫星通信系统的设计思想、技术体系和终端设备以及目前的实施情况。
The design principles, technical terminal equipment and the implementation of the LEO satellite - based mobile communications system are described in this article.
基于星上路由交换技术的宽带卫星通信系统一直是未来移动通信系统的重要组成部分。
Wideband satellite communication system that based on the satellite - based Routing and Switching system is an important pattern of future mobile communication system.
本文介绍全球移动卫星通信系统的现状、种类及其将来的发展趋势。对“铱”星系统也作了介绍。
This paper introduces the present and future of Global mobile Satellite communication system. IRIDIUM system is also introduced.
本文首先对移动卫星通信系统进行了概括性的介绍，分析了移动卫星通信系统的特点及与一般移动通信系统的相比的特殊性。
Firstly, the paper has an overview of mobile satellite communication system, analyzes its character and the peculiarity compared with terrestrial wireless system.
跳频技术具有很强的抗干扰能力和组网灵活等优点，在军事无线通信、民用移动通信、卫星通信、现代雷达和声纳等电子系统中有重要应用。
Frequency hopping has the advantage of anti-jamming and the flexible of networks, it is important applications of military communication, mobile communication, modern radar and sonar.
无线通信接收机覆盖了无线电通信、电视广播、无线电广播、雷达定位、遥测遥控、卫星通信以及移动通信系统等各个领域。
Wireless communication receiver applies widely in so many areas such as wireless communication, television, broadcast, radar, satellite communications and so on.
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