扩频通信系统中扩频码的产生和载频调制电路仿真-电子与通信工程专业论文.docxVIP

华北电力大学工程硕士专业学位论文摘 华北电力大学工程硕士专业学位论文 摘 要 扩频技术是一种信息传送技术。它是利用伪随机码对被传输信号进行频谱扩 展，使之占有远远超过被传送信息所必须的最小带宽。本论文以扩频通信为基础， 分析了伪随机序列的特点，着重介绍了m序列和Gold序列的相关知识，首先本论 文简要阐述了扩频通信的基本理论、扩频通信系统的工作原理及系统中的载频调 制电路的工作原理，然后分别对m序列和G01 d序列这两种常用的伪随机序列的性 质、产生原理、自相关特性及互相关特性随机特性进行了详细的分析研究，最后 在理论证明的基础上应用Matlab仿真产生m序列和Gold序列并验证它们的性质， 同时仿真出m序列和Gold序列相关特性图形并加以比较。 关键词：扩频通信系统，扩频码，载波调制 ABSTRACT The Spread-spectrum technique is a kind of technology of information transmission．It spreads the spectrum by using the code unrelated with the information and makes its bandwith much wider than that required．In the paper’ we analyzed characteristics of the pseudo-random sequence based on the spread spectrum communication．The related knowledge of m sequence and Gold sequence were introduced．First，basic theory of spread spectrum communication，working principle and category of spread spectrum system were briefly expounded． Secondarily，the properties，principle，hardware circuit and self-correlated and related randomicity of m sequence and Gold sequence were investigated in detail． Finally,we proved that these properties theory on the basis of application of Matlab simulation produced m sequence and Gold sequence and verify their properties．The related images were obtained and compared using simulated program of m sequence and Gold sequence at the same time． Yang Xiuqing(Electronic Science and communication Engineering) Directed by prof．Zhao LianQing KEY WORDS：Spread Spectrum Communication System，Spread Spectrum Code， Carrier Frequency Modulation 华北电力大学工程硕士专业学位论文摘 华北电力大学工程硕士专业学位论文 摘 要 扩频技术是一种信息传送技术。它是利用伪随机码对被传输信号进行频谱扩 展，使之占有远远超过被传送信息所必须的最小带宽。本论文以扩频通信为基础， 分析了伪随机序列的特点，着重介绍了m序列和Gold序列的相关知识，首先本论 文简要阐述了扩频通信的基本理论、扩频通信系统的工作原理及系统中的载频调 制电路的工作原理，然后分别对nl序列和Gold序列这两种常用的伪随机序列的性 质、产生原理、自相关特性及互相关特性随机特性进行了详细的分析研究，最后 在理论证明的錾础上应用Matlab仿真产生m序列和Gold序列并验证它们的性质， 同时仿真出m序列和60ld序列相关特性图形并加以比较。 关键词：扩频通信系统，扩频码，载波调制 ABSTRACT The Spread—spectrum technique is a kind of technology of information transmission．It spreads the spectrum by using the code un