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简单码分复用技术及其Matlab仿真.doc
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简单码分复用技术及其Matlab仿真.doc
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简单码分复用技术及其
Matlab 仿真
作者 XX:肖 杨
专业名称:通信工程
指导教师:梁维海 讲师
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2012 年 5 月 20 日
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摘要
关键词:多址技术 频分复用 相干解调 非相干解调
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Abstact
With the emergence of a variety of high - speed munication
services and increase in the number of access users,With a lot
of pressure on the existing munication network ,Alleviate the
problem of network bandwidth multiplexing the emergence of.
Which code-division multiplexing is a kind of rely on di#erent
codes to distinguish the brightest of the original signal a
multiplexing, And a variety of multiple access technologies
bine to produce a variety of access technologies, Including
wireless and wireline access. For example , multiple access
cellular system based on the channel to distinguish between
the munication object,One channel only to acmodate a user
calls, Many users call at the same time, Each other to
distinguish the channel, This is the multiple access. Multiple
access technology is divided into frequency division multiple
access (FDMA) , time division multiple access (TDMA) , Code
Division Multiple Access (CDMA ), Space Division Multiple
Access (SDMA).
Keywords:Multiple Access Technology Frequency
Division Multiplexing Coherent
demodulationNon-coherent demodulation
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目录
摘要......................................................................................................I
Abstact.................................................................................................II
目录....................................................................................................III
引言......................................................................................................1
1 复用技术及多址技术.......................................................................2
1.2 复用技术〔多址技术〕........................................................2
2 码分复用原理...................................................................................6
.1 发送端〔信号的合成〕..........................................................8
.2 接收端〔信号的分解〕..........................................................8
.2.1 方案一单边带调制频分复用 9
.2.2 方案二 11
3 码分复用的 Matlab 仿真................................................................13
.3 Matlab 仿真〔不调用内嵌函数〕.......................................13
.4 Matlab 仿真结果...................................................................15
.5 Simulink 仿真........................................................................15
.6 Simulink 仿真结果................................................................15
4 码分复用技术的典型应用.............................................................16
.7 CDMA 在 3G 中的应用........................................................16
.7.1 框图 16
.7.2 仿真 18
.8 CDMA 在扩频通信中的应用...............................................22
.8.1 框图 24
.8.2 仿真 25
5 总结.................................................................................................31
致谢....................................................................................................32
参考文献............................................................................................33
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