基于WCDMA系统信道模型仿真论文.doc

基于WCDMA系统信道模型的仿真 The system based on the WCDMA channel model simulation study 学 生 姓 名: 指 导 教 师: 摘 要 CDMA技术是当前无线电通信，尤其是移动通信的主要技术，不论是在中国已经建立的IS-95规范的中国联通CDMA网、各大移动通信运营商正准备实验及建立第三代（3G）系统还是大设备研发商已经在开发的三代以后（也称为4G）更宽带宽的移动通信系统，CDMA都是主要的选择。 CDMA概念可以简单地解释为基于扩频通信的调制和多址接入方案。本文阐述了扩展频谱通信技术的理论基础和CDMA通信系统的组成，建立了直序扩频码分多址通信系统模型，并利用MATLAB 提供的可视化工具Simulink进行仿真分析。 关键词：码分多址 ；直序扩频 ；伪随机序列；视化工具； Abstract The CDMA technology is the current radio traffic, particularly mobile communication major technique, no matter already established in China IS-95 the standard China Unicom CDMA network, each big mobile communication operator will be preparing to test and establishes the third generation (3G) system big equipment research and development business already (also to be called 4G) in development three generation of later the wider band width mobile communication system, CDMA was the main choice. The CDMA concept may explain simply for based on the wide frequency correspondence modulation and the multiple accesses turning on plan. This article elaborated the spread spectrum communication technologys rationale and the CDMA communications systems composition, has established the straight foreword wide frequency code division multiple access communications system model, and visualization tool Simulink which provides using MATLAB carries on the simulation analysis. Keywords:CDMA ; Direct Sequence Spread Spectrum ; Pseudo noise sequence; Visualization Tool 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc201594962 摘要 PAGEREF _Toc201594962 \h I HYPERLINK \l _Toc201594963 Abstract II HYPERLINK \l _Toc201594964 第一章 概述 1 HYPERLINK \l _Toc201594965 1.1 论文选题背景 1 HYPERLINK \l _Toc201594966 1.2 3G系统功能概述 1 HYPERLINK \l _Toc201594967 1.3 多址通信方式 2 HYPERLINK \l _Toc201594968 第二章 WCDMA原理与仿真 5 HYPERLINK \l _Toc201594969 2.1 WCDMA技术基础原理 5 HYPERLINK \l _Toc201594970 2.2 WCDMA系统的主要优点 6 HYPERLINK \l _Toc201594971 第三章 扩展频谱通信的基本概念 13 HYPERLINK \l _Toc2015