张彦龙4G网络通信技术本科毕业论文

第四代移动通信TD-LTE

第四代移动通信的研究

摘要

摘要：通信技术日新月异，给人们带来不少享受。随着数据通信与多媒体业务需求的发展，适应移动数据、在我们还没有完全享受3G移动通信系统商所带来服务的同时,4G移动通信技术的研究已经在逐步的进行着。本文简要分析了:(1) 4G的网络结构;(2) 4G的关键技术,如OFDM,软件无线电,智能天线技术,MIMO技术。

(3) 比较了3G和4G不同指标,分析了3G和4G采用的不同技术。(4) 初步探讨了4G的现状和发展。

关键词：4G，网络通信

第四代移动通信TD-LTE

Abstract

The communication technology advances, to bring a lot of enjoyment. With the demand for data communications and the development of multimedia services to meet the mobile data, as we have not fully enjoy the 3G mobile communication systems brought about by the service providers at the same time, 4G Mobile Communication Technology has been engaged in gradually. This paper analyzes: (1) 4G network structure; (2) 4G key technologies such as OFDM, software radio, smart antenna technology, MIMO technology. (3) to compare the different indicators of 3G and 4G, 3G and 4G are analyzed using different techniques. (4) discussed the status and development of 4G.

keywords：4G, network communication

第四代移动通信TD-LTE

目录

摘要 ................................................................. I 目录 ............................................................... III

前言 ................................................................. 1

第一章 移动通信的发展历程与4G网络结构 ............................... 2

1.1 移动通信的发展历史

1.2 4G的三层网络结构 ..........................................................................................3

1.3 4G物理层结构 .................................................................................................4

第二章 4G网络中的关键技术 ............................................ 6

2.1 OFDM ................................................................................................................6

2.2软件无线电.......................................................................................................7

2.3 智能天线技术(SA) ...........................................................................................7

2.4 多输入多输出(MIMO)技术 .................................................................................7

2.5 基于IP的核心网 .............................................................................................8

第三章 3G与4G的比较 ................................................. 9

3.1核心阅读 ..........................................................................................................9

3.2技术指标方面 ...................................................................................................9

3.3技术方面 ........................................................................................................ 10

3.4速度方面 ........................................................................................................ 10

3.5 4G是什么 ...................................................................................................... 11

3.6 4G会采用什么标准 ........................................................................................ 12

3.7 4G手机怎么样 ............................................................................................... 13

3.8公众何时能用上4G ......................................................................................... 14

3.9 4G会取代3G吗.............................................................................................. 15

第四章 5大4G标准 .................................................. 16

4.1 LTE ................................................................................................................ 17

4.2 LTE-Advanced ................................................................................................ 17

4.3 WiMax............................................................................................................. 18

第五章、4G的发展展望 ................................................ 19

5.1显著的差异..................................................................................................... 19

5.2无线宽带，一插即行....................................................................................... 20

5.3其它市场 ........................................................................................................ 20

5.4我国的4G的发展 ............................................................................................ 21

第六章 4G的主要优势 ................................................. 28

6.1网络频谱更宽 ................................................................................................. 28

6.2通信更加灵活 ................................................................................................. 28

6.3智能性能更高 ................................................................................................. 29

第四代移动通信TD-LTE

6.4兼容性能更平滑.............................................................................................. 29

6.5提供各种增值服务 .......................................................................................... 29

6.6实现更高质量的多媒体通信 ............................................................................ 29

6.7频率使用效率更高 .......................................................................................... 30

6.8通信费用更加便宜 .......................................................................................... 30

第七章 4G存在缺陷 ................................................... 31

7.1标准难以统一 .......................................................... …… 此处隐藏：5041字，全部文档内容请下载后查看。喜欢就下载吧 ……