文档介绍：毕业设计说明书(论文)
作者: 李伟学号: 0806220125
学院: 信息工程学院
专业: 通信工程
题目: 扩频通信中PN码捕获的SIMULINK
仿真实现
指导者: 李楠副教授
(姓名) (专业技术职务)
评阅者:
(姓名) (专业技术职务)
2008年 6 月吉林
毕业设计说明书(论文)中文摘要
扩频通信系统与普通通信系统相比,具有很强的抗干扰、抗多径性能,并且具有信息隐蔽、高精度测量、多址保密通信等特点。扩频码的同步和捕获问题是扩频通信系统进行正确传输的关键问题,即只有在接收部分与发送部分的扩频码相位保持完全相同时,扩频码调制的信息才能被正确解扩。保持发送、接收部分扩频码的同步是扩频通信系统中的一项重点和难点技术。
文分析扩频通信系统的性能特点,研究扩频码的产生与相关性,对扩频通信系统中扩频码的捕获时间问题进行深入研究。研究捕获方法思想并在SIMULINK平台上予以实现。拟采用滑动相关法实现捕获阶段的扩频码的捕获。
通过仿真结果表明,相比较其它方法,该方法在扩频码捕获上具有硬件简单,易于实现等优点。
关键词:扩频通信;扩频码;滑动相关
毕业设计说明书(论文)外文摘要
Title SIMULINK Implementation of PN Code Acquisition in Spread-munications
Abstract
Compared with other munication systems, Spread Spectrum(SS) technology has the advantages of low probability to intercepting, a high immunity to interference, hiding the useful information and multiple-munication ability. Acquisition and synchronization of expand frequently code munication-specific critical problem of accurate transmission. Only if the codes of receiver parts are identical with the transmitter part, information modulated by codes could be de-spread or demodulated right. Keep the send part and receiver parts Synchronism is an important and challenging technique in munication,
This paper analyzes the performance characteristics of spread munication system. To research the spreading code generation and correlation. In-depth study on the acquisition time of spreading codes in spread munication system and acquisition method of ideological to Simulation in SIMULINK platform. Use the Sliding correlation method to achieve the acquisition of the acquisition phase of the spreading code.
Through the simulation results show pared to other methods, this method in spread spectrum code acquisition has the feature that hardware is simple, easy to implement and so on.
Keywords: Spread munication; Spread spectrum codes; slipping-acquisition- method
目录
摘要 I
ABSTRACT II
目录 III
第1章绪论 1
课题研究意义 1
扩频码捕获的研究现状 1
扩频码捕获方法简介 3
本文所做的主要工作 4
第2章 MATLAB