移动通信卫星

第三代移动通信卫星/地面信道建模与仿真技术

Modeling and simulation of satellite / terrestrial channel in 3G mobile communications

移动通信卫星经济性分析

Economic analysis of mobile communication satelites

中国在四川省西昌卫星发射中心成功发射一颗新型移动通信卫星。

China has successfully launched a new mobile telecommunications satellite from the Xichang Satellite Launch Center in Sichuan Province .

周四，中国在四川省西昌卫星发射中心成功发射了一颗新的移动通信卫星。

China successfully launched a new mobile telecommunications satellite from the Xichang Satellite Launch Center in Sichuan Province on Thursday .

因此，MC-CDMA在移动通信、卫星通信、无线接入以及超宽带通信等领域具有广阔的应用前景，被誉为4G移动通信的有效解决方案。

So MC-CDMA has wide application prospects in mobile communication , satellite communication , wireless access and ultra-wideband communication .

卷积编码和Viterbi译码是一种有效的前向纠错方法，广泛应用在移动通信和卫星通信中。

The convolutional coding and viterbi decoding is an effective forword error correction method , and it is widely used in mobile communications and satellite communications .

本文简要地介绍了光纤通信、移动通信、卫星通信、综合业务数字网（ISDN）和多媒体通信的关键技术及其总的发展超势。

The paper briefly describes the key technologies and their development trends used in optical fibre communication , mobile communication , satellite communication , ISDN and multi-media communication .

随着通信、计算机网络等技术的飞速发展，尤其是最近20年，语音压缩编码技术在移动通信、卫星通信、多媒体技术以及IP电话通信中得到普遍应用，并起着举足轻重的作用。

With the rapid development of communications and internet technology , especially the recent 20 years , speech compressing coding technology has been widely used and plays a very important role in mobile communications , satellite communications , multimedia communications and IP-phone communications .

第三代移动通信系统卫星移动网标准的研究状况

Standardization Works for Satellite Mobile Network in Third Generation Mobile Telecommunication System

平流层通信信道具有地面移动通信与卫星通信信道的双重特性。

HAPS communition channel has the dual characteristics of the terrestrial mobile communication channel and satellite communication channel .

介绍了一种广泛应用于移动通信、卫星通信中的π/4-DQPSK调制解调技术。

The π / 4-DQPSK modem technology which is widely used in mobile communication and satellite communication is introduced .

由于它的功率及频谱利用率高，在传统通信、移动通信和卫星通信系统中得到了广泛的应用。

Because of its high power and high utility of spectrum , it has found wide application in communication , mobile communications and satellite communication .

简述第三代移动通信和卫星移动通信关系和全球星卫星移动通信系统的特征。

In this article , it describes the relations between the third generation mobile communication and satellite communication , the characteristics of global satellite mobile communication .

随着移动通信和卫星通信的迅猛发展，人们已经意识到频谱资源的宝贵，高效的调制体制随之得到越来越深入的研究。

With rapid development of mobile communication and satellite communication , people have realized that the spectrum resource is precious , then efficient modulation system get more and more in-depth research .

移动通信、卫星通信以及国防电子系统微型化的迅速发展，对微波滤波器的性能、尺寸、可靠性和成本均提出了更高的要求。

As the rapid development of the miniaturization of the mobile communications , satellite communications and defense electronics systems , the performance , size , reliability and cost of the microwave filter have put forward the higher requirements .

三维空间微波、毫米波集成电路可预见的商业应用领域遍及各种无线应用场合，包括移动通信、卫星通信、无线缆电视、无线局域网和车载雷达等。

The application of three-dimensional microwave and millimeter wave integrated circuits spreads nearly all over the wireless applications , including mobile communications , satellite communications , wireless cable television , wireless local area network ( LAN ), vehicular radar and so on .

近年来，随着现代移动通信、卫星通信、无线本地通信和各种军/民用雷达的迅猛发展，对作为无线通信系统必不可少的部件之一的天线的需求也日益提高。

In recent years , with rapid development of modern mobile communications , satellite communications , wireless local communications and a variety of military and civilian radar , the demand of the antennas which is one of the essential components of wireless communication systems increases .

由于数字微波通信具有频率高，频带宽，传输信息量大的特点，所以被广泛应用于各种通信领域，包括微波多路通信，微波中继通信，移动通信和卫星通信。

As the digital microwave communication with higher frequency , wider frequency band and larger amount of information transmission , it is widely used in a variety of communication fields , such as multi-channel microwave communication , microwave relay communication , mobile communication satellite communication and so on .

729A具有算法时延短、语音质量好、算法复杂度适中的特点，广泛应用于IP电话、移动通信、数字卫星通信等领域。G。

729A has been widely used in the field of IP telephone , mobile communications , digital satellite communications , and so on .

低轨卫星是未来卫星通信发展的趋势，低轨卫星星座CDMA移动通信系统是卫星通信和地面移动通信发展的结晶。

The small LEO satellite communication is the trend of satellite communications . The mobile LEO small satellite CDMA communication is the joint result of satellite communications and land mobile communications .

第3代移动通信中的卫星通信部分已提到了议事日程。

Satellite communications of third-generation mobile commu - nications has come to be the item on daily agenda .

729计算复杂度，它主要应用在个人移动通信、数字卫星系统和高质量数字移动无线通信等领域。

729A include personal mobile communication , digital satellite system and high quality digital mobile wireless communication , etc.

在20世纪即将结束之际，本文作者对固定卫星通信、移动卫星通信、卫星直播等进行了总结性的回顾与介绍，揭示了某些发展趋势。

This paper presents a summary of the fixed satellite communications , mobile satellite communications , and direct broadcasting satellite services in retrospect .

其中，由于低轨卫星移动通信系统的卫星轨道高度低，具有通信时延短，链路损耗小、组网灵活等特点，发展前景非常广阔。

Among kinds of satellite communication systems , the LEO satellite communication system has very wide prosperity because its orbit is low and it has less communication delay , less path loss and flexible network organization .

论文综述了VSAT、移动卫星通信和先进卫星通信系统三个热点，指出了它们的应用情况和发展前景。

The paper overviews the applications and development prospects of VSAT , mobile satellite communication and advanced satellite communication system .

这些研究成果不仅在军事领域，如飞机上、导弹上、火箭上等，还在商业领域，如移动卫星通信，广播卫星，全球卫星定位系统，遥感等方面有着极其广泛的应用。

All these research results are widely applied in military field such as aircraft , missiles and rockets but also in commercial areas such as mobile satellite communications , the broadcast satellite system , global positioning system ( GPS ), remote sensing .

卫星通信是现代通信技术之一，卫星移动通信是实现全球个人通信的必然组成部分，而多媒体卫星移动通信是当前卫星通信界的研究热点之一。

Satellite mobile communication systems are parts of realizing global personal communications .