跳频系统的设计与实现

沈阳理工大学学士学位论文I摘要跳频通信系统是一种典型扩展频谱通信系统，它在军事通信、移动通信、计算机无线数据传输和无线局域网等领域有着十分广泛的应用，已成为当前短波保密通信的一个重要发展方向。本文介绍了跳频通信系统的基本工作过程，从跳频系统的结构组成、工作原理、主要技术指标、跳频通信系统的解跳和解调等方面阐述了跳频通信基本原理,并对跳频通信系统的抗干扰技术及其性能进行了仿真研究。本文从理论上分析了跳频通信系统的抗干扰性能，其组成部分包括信号生成部分、发送部分、接收部分、判决部分、跳频子系统模块五个部分，并以BPSK系统为例，利用Matlab仿真系统实现跳频系统的仿真，模拟一个64跳的跳频系统的发送系统，分析仿真结果达到了预期的效果。关键词：跳频通信系统；BPSK；Matlab；仿真沈阳理工大学学士学位论文IIAbstractFrequencyhoppingcommunicationsystemisatypicalspreadspectrumcommunicationsystem,itisinmilitarycommunications,mobilecommunications,computer,wirelessdatatransmissionandwirelesslocalareanetwork(LAN),andotherfieldshasaverywideapplication,hasbecomethecurrentshortwavecommunicationsecurityisanimportantdevelopmentdirection.Thispaperintroducesthebasicworkingprocessoffrequencyhoppingcommunicationsystem,fromthestructureofthefrequencyhoppingsystemcomposition,workingprinciple,maintechnicalindex,thesolutionofthefrequencyhoppingcommunicationsystemanddemodulationetc.Thispaperexpoundsthebasicprincipleoffrequencyhoppingcommunication,andtheanti-jammingtechnologyoffrequencyhoppingcommunicationsystemanditsperformancehascarriedonthesimulationresearch.Thispaperanalyzedtheoreticallytheanti-jammingperformanceoffrequencyhoppingcommunicationsystem,itscomponentsincludesignalgeneratingparts,send,receive,asentence,afrequencyhoppingsubsystemmoduleoffiveparts,andtaketheBPSKsystemasanexample,theuseofMatlabsimulationsystemrealizationoffrequencyhoppingsystemsimulation,simulationofa64jumpfrequencyhoppingsystemsendsystem,analysisthesimulationresultsreachtheexpectedeffect.Keywords:Frequencyhoppingcommunicationsystem;BPSK;MATLAB;Thesimulation沈阳理工大学学士学位论文III目录1绪论......................................................................................................................................11.1概述...........................................................................................................................11.2.1跳频通信系统概述........................................................................................11.2.2跳频技术的应用背景和发展趋势................................................................21.3MATLAB简介..........................................................................................................32跳频系统的基本原理..........................................................................................................52.1跳频系统概述...........................................................................................................52.1.1系统结构及信号传输过程............................................................................52.1.2跳频系统的概念............................................................................................52.2跳频信号的发送和接收...........................................................................................62.2.1跳频信号的发送............................................................................................62.2.2跳频信号的接收............................................................................................82.3跳频系统的扩频码序列和跳频图案的设计.........................................................112.3.1伪随机码的特性..........................................................................................112.3.2跳频图案的设计..........................................................................................113跳频系统关键单元工作机理............................................................................................143.1PN码的产生...........................................................................................................143.2BPSK调制机理......................................................................................................173.1.1BPSK信号产生基本原理...........................................................................173.1.2BPSK信号的功率谱密度...........................................................................184跳频信号设计与仿真........................................................................................................204.1跳频信号设计方案.................................................................................................204.1.1设计方案......................................................................................................204.1.2参数设置......................................................................................................204.2仿真源程序.............................................................................................................214.3仿真结果及分析.....................................................................................................26结论........................................................................................................................................30致谢........................................................................................................................................31沈阳理工大学学士学位论文IV参考文献..................................................................................................................................32附录A英文原文..................................................................................................................34附录B中文翻译................