CDMA直扩收发系统Simulink仿真设计(论文).doc

... ... CDMA 直扩收发系统的 Simulink 仿真设计( 论文) 摘要从人类开始进入信息社会至今,通信技术的发展取得了令人瞩目的成绩。随着通信的普及, 信道中的各种干扰也愈加增多。如何在恶劣的环境条件下保证信息能够有效可靠的传输已俨然成为当今通信研究人员所面临的重大难题。扩频通信是指用于传输信号的信道带... <p> 摘&nbsp; 要<br /> 从人类开始进入信息社会至今,通信技术的发展取得了令人瞩目的成绩。随着通信的普及, 信道中的各种干扰也愈加增多。如何在恶劣的环境条件下保证信息能够有效可靠的传输已俨然成为当今通信研究人员所面临的重大难题。<br /> 扩频通信是指用于传输信号的信道带宽远远大于信号自身带宽的一种通信方式。与传统无线通信方式相比, 其在抗噪声、抗干扰、抗多径衰落、码分多址、信号的隐蔽性及保密性等方面有着无与伦比的优势, 从而与光纤通信、卫星通信一起被誉为信息时代的三大主流通信传输方式。本文主要阐述用 simulink 软件对 CDMA 直扩收发系统进行仿真,研究其优越的抗噪声、抗干扰、抗多径、多址等性能。<br /> 本文的主要内容有: <br /> 1. 对扩频通信中各种主要技术进行一定的理论分析; <br /> 2. 对当前一些流行的模型实现方法进行描述,包括数字匹配滤波捕获技术、迟早环跟踪技术等; <br /> 3. 介绍如何使用 simulink 软件进行扩频通信系统的仿真; <br /> 4. 结合仿真结果对扩频通信系统进行性能分析。<br /> 关键词:扩频通信; simulink ; CDMA 直扩收发系统; <br /> <br /> Abstract<br /> From the information society humans enter, the development munication technology has making miraculous progress. As the popularization munication, a variety of Interference in transport channel increases dramatically. That how to transport information efficiently and correctly under the adverse circumstances has e a rough problem the researcher of ... ... communication has to face with <p class='Xit316'></p> <br /> Spread munication isa kind munication patterns in which the band bandwidth&nbsp; used to transport information is far larger than the original signal. Compared with the traditional munication, it has many unparalleled advantages on the performance of anti-noise, anti-jamming, fighting against multi-path fading, code division multiple access and the elusive and confidentiality of the signal. It has e the three munication patterns with the munication and munications. This text mainly expound that how to simulate the DS-CDMA system use the SIMNLINK software and study it&rsquo;s superior&nbsp; capacity of anti-noise, anti-jamming, fighting against multi-path fading and code division multiple access.<br /> The main body of this article as follows:<br /> 1. Studying the main technology theoretically in Spread munication;<br /> 2. Depicting some current m