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摘要Ⅰ摘要当今信息时代，如何有效的利用宝贵的频带资源，如何进行准确可靠的信息通信是通信领域中至关重要的问题。扩频通信正是在这种背景下迅速发展起来的。快调频通信是扩频通信的一种实现方式，在抗干扰和保密性方面，它是扩频通信中很好的通信方式。在具体的实现上，跳频通信是一个用户的载波按某种跳频图案（伪随机跳频序列）在很宽的频带范围内随机的跳变。由于频率跳变的不确定性，所以很好的实现了保密通信。在本次毕业设计中，是用MATLAB实现快跳频通信系统的仿真。MATLAB是一种功能强大的软件，在统计、信号处理、人工智能以及通信领域得到了广泛的应用。在快跳频系统的设计中，主要用到SIMULINK和COMMUNICATIONBLOCKS两个工具箱。在具体实现过程中，还要结合用MATLAB语言编写的程序实现整个过程的设计。关键词：跳频通信系统、频率跳变、跳频图案、MATLABABSTRACTⅡABSTRACTThisinformationage,howtoeffectivelyusevaluablebandresources,andhowtoimplementtheaccurateandreliableinformationcommunicationisthemostimportantcommunicationfield.Spreadspectrumcommunicationwasagainstthisbackdroprapidly.QuickFMcommunicationsisspreadspectrumcommunicationinarealization,anti-jammingandprivacyaspects,itisspreadspectrumcommunicationofgoodcommunicationmode.Intheconcreteimplementation,fhcommunicationisauser'scarrieraccordingtosomefhdesign(pseudorandomfhsequence)inaverywidebandrangerandomjumptochange.Becauseoftheuncertaintyoffrequencyhopping,sogoodrealizedthesecretcommunication.Inthegraduationdesign,isMATLABfastfrequencyhoppingcommunicationsystemsimulation.MATLABIsapowerfulsoftware,instatistics,signalprocessing,artificialintelligence,andcommunicationdomainbeenwidelyused.Infastfrequencyhoppingsystemdesign,mainlyusingSIMULINKandCOMMUNICATIONBLOCKStwotoolbox.Inconcreterealizationprocess,combineMATLABlanguageprogrammingrealizethewholeprocessdesign.Keywords:frequencyhoppingcommunicationsystem,frequencyhopping,frequency-hoppingpatternandMATLAB目录Ⅲ目录第一章引言..............................................................................................................11.1概述.....................................................................................................................11.2扩频通信的基本概念和理论基础.........................................................................21.3扩频通信的主要特点.............................................................................................41.4扩频通信的几种方式.............................................................................................6第二章MATLAB通信系统仿真组件及流程介绍.....................................................82.1MATLAB仿真环境.................................................................................................82.2MATLAB语言介绍.................................................................................................92.3SIMULINK的核心—S－函数..............................................................................102.3.1S－函数的仿真工作原理...................................................................................102.3.2S－函数的仿真流程..........................................................................................112.3.3SIMULINK的设计和开发.................................................................................12第三章跳频通信系统的性能分析............................................................................143.1跳频系统概述.......................................................................................................143.1.1系统结构及信号传输过程................................................................................143.1.2跳频系统的几个概念........................................................................................153.2跳频信号的发送和接收.......................................................................................153.2.1跳频信号的发送................................................................................................153.2.2跳频信号的接收................................................................................................163.2.3正确接收跳频信号的条件................................................................................163.2.4跳频信号的波形................................................................................................173.3快跳频系统的扩频码序列和跳频图案的设计...................................................18电子科技大学成都学院本科课程设计论文Ⅳ3.3.1概述..................................................................................................................183.3.2Gold序列的实现................................................................................................183.3.3跳频图案的设计................................................................................................19第四章跳频通信仿真框图及模型............................................................................224.1快跳频系统的仿真框图及功能...........................................................................224.2跳频通信各部分模型介绍...................................................................................23第五章快跳频系统仿真程序及仿真结果................................................................335.1伪随机码序列设计与仿真...................................................................................335.1.1伪随机码序列的程序设计................................................................................335.1.2Gold码仿真结果................................................................................................355.1.3伪随机码的第二种实现方式............................................................................355.1.4伪随机整数序列的仿真结果............................................................................365.2快跳频通信系统的仿真结果...............................