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第四代移动通信技术的发展研究
作者:admin   发布于:2014-03-05 20:22    文字:【】【】【
 
第四代移动通信技术的发展研究 

摘  要

     人们自从接触通信以来,一直在追求通信的自由。无线通信从军用走向商用,第一代移动通信和第二代移动通信在部分程度上满足了人们的这种需求。但是随着互联网和多媒体技术的兴起,人们对移动通信提出了更高的要求。于是现如今第三代移动通信渐渐开始普及,而第四代移动通信(4G)的理论与实践方面的研究也已经如火如荼的展开。
第四代移动通信系统(4G),是集第三代移动通信系统(3G)与WLAN 于一体并能够传输高质量视频图像的技术产品,并且其图像传输质量与高清晰度的电视不相上下。第四代移动通信提供更有效的多种业务,实现商业无线网络、局域网、蓝牙、电视卫星通信等服务之间的无缝衔接并相互兼容。它体现了移动与无线接入网及IP网络不断融合的发展趋势。第四代移动通信具有许多前几代所不具有的优势,已成为移动通信领域的研究热点。
第四代移动通信已经渐渐被应用于我们的生活之中,第四代移动通信的发展也正在成为人们关注的焦点。本文立足于前人关于第四代移动通信的研究。回顾历代移动通信的发展历程,并对第四代移动通信的未来研究进行了展望。重点展示了第四代移动通信的关键技术,和第四代移动通信与前几代通信系统相比的优缺点。
关键词:4G  第四代移动通信  关键技术  发展

ABSTRACT

   Since people contact communication, has been in the pursuit of freedom of communication. From military to commercial wireless communications, the first generation of mobile communication (1G) and second-generation mobile communication (2G) in part to meet the people of this demand. But with the rise of the Internet and multimedia technology, people put a higher mobile communication requirements. So is now the third generation mobile communication (3G) gradually began to spread, and the fourth generation mobile communication (4G) the theory and practice of research has also been in full swing.
   The fourth generation mobile communication systems (4G), is a third-generation mobile communication systems (3G) and WLAN in one and be able to transmit high quality video image technology products, and its image transmission quality comparable with the high-definition television . The fourth generation of mobile communications to provide a variety of business more effectively and achieve commercial wireless networks, LAN, Bluetooth, TV, satellite communications services and seamless transition between mutually compatible. It embodies the mobile and wireless access network and IP network continued integration trends. The fourth generation mobile communication has many previous generations do not have the advantage of mobile communications has become a hot research field.
   The fourth generation mobile communication has gradually been applied to our lives, the fourth generation mobile communication development is also becoming the focus of attention. This article is based on the previous fourth generation mobile communication on research. Recalling history of mobile communications development process, and the fourth generation mobile communication for future research are discussed. Highlight the crucial fourth generation mobile communication technology, and fourth-generation mobile communications and communications systems compared to previous generations of the advantages and disadvantages.
Keywords: 4G  fourth generation mobile  communication key technology  development
 
 

目  录
第一章  绪论...................................................... 1
  1.1  第四代移动通信技术的定义........................................... 1
  1.2  第四代移动通信技术的特征........................................... 1
第二章  我国移动通信的发展历程..................................... 3
  2.1  我国模拟移动通信系统发展简述....................................... 3
  2.2  我国第三代移动通信系统面临的问题................................... 3
  2.3  第四代移动通信系统的研究与发展..................................... 4
第三章  第四代移动通信的关键技术................................... 7
  3.1  第四代移动通信五大标准............................................. 7
    3.1.1  LTE............................................................ 7
    3.1.2  LTE-Advanced.................................................... 7
    3.1.3  WiMax.......................................................... 8
    3.1.4  HSPA+:高速下行链路分组接入技术................................ 9
    3.1.5  WirelessMAN-Advanced............................................ 9
  3.2  第四代移动通信的关键技术.......................................... 10
    3.2.1  正交频分复用(OFDM)技术..................................... 10
    3.2.2  智能天线技术................................................... 11
    3.2.3  MIMO技术..................................................... 12
    3.2.4  软件无线电(SDR)技术......................................... 12
    3.2.5  多用户检测技术................................................. 13
    3.2.6  IPv6技术....................................................... 14
第四章  4G通信的优势和缺陷....................................... 15
  4.1  4G的优势......................................................... 15
  4.2  4G的缺陷......................................................... 17
第五章  第三代与第四代移动通信技术对比分析......................... 21
  5.1  核心技术的对比分析................................................ 21
  5.2  体系结构的对比分析................................................ 21
  5.3  系统参数的对比分析................................................ 20
第六章  第四代移动通信的应用...................................... 21
  6.1  实时移动视频...................................................... 21
  6.2  在线游戏.......................................................... 21
  6.3  基于云计算的应用.................................................. 22
  6.4  应用增强现实技术导航.............................................. 24
  6.5  应急响应和远程医学................................................ 25
第七章  第四代移动通信的目标和展望................................ 27
  7.1  4G移动通信技术的展望............................................. 27
  7.2  第四代移动通信发展目标............................................ 27
第八章  结语..................................................... 29
致  谢........................................................... 31
参考文献......................................................... 33


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