基于MATLAB的扩频通信研究.doc

基于MATLAB的扩频通信研究

摘要

扩展通信的技术复杂，比较难模拟，为了更好的研究相关问题，本文关于MATLAB的扩频通信技术方面进行相关调查研究。为更好的掌握该技术，通过MATLAB提供的Simulink的工具包以此创建的名为扩频通信系统的模型，之后对该仿真程序进行运行并使用扩频码，保证系统误码率不改变，以此建立扩频增益与输出信噪比二者间的联系，并对扩频通信系统进行学术探究。观察有关数据发现，系统的输出信噪比有了良好的改良。所以通过研究MATLAB该仿真模型，扩频通信系统具有强抗干扰能力，为扩频通信的现代通信打下坚实基础。

关键词：扩频通信；MATLAB；扩频增益；输出信噪比；强抗干扰能力

ResearchonspreadspectrumcommunicationbasedonMATLAB

Abstract

The?technology?of?extended?networking?is?complex?and?difficult?to?approximate.?In?order?to?study?the?related?problems?better,?this?paper?examines?the?spread?spectrum?communication?technology?of?MATLAB.?In?order?to?better?master?the?technology,?the?Simulink?software?kit?provided?by?Matlab?is?used?to?create?a?model?called?spread?spectrum?communication?system.?Then?the?simulation?program?is?run?and?spread?spectrum?code?is?used?to?assure?that?the?failure?rate?of?the?system?does?not?change,?so?as?to?obtain?the?relationship?between?the?spread?spectrum?gain?and?the?output?signal-to-noise?ratio,?and?carry?out?academic?research?on?the?spread?spectrum?communication?system.?It?has?been?found?that?the?SNR?output?of?the?system?has?been?improved.?Therefore,?through?the?study?of?the?MATLAB?simulation?model,?the?spread?spectrum?communication?system?has?a?strong?anti-jamming?ability,?which?lays?a?concrete?foundation?for?the?modern?communication?of?spread?spectrum?communication.?technology?of?extended?communication?is?complex?and?difficult?to?simulate.?With?the?purpose?of?studying?the?related?problems?better,?this?paper?studies?spread?spectrum?communication?based?on?MATLAB.?On?the?basis?of?thoroughly?mastering?the?theory?of?spread?spectrum?communication,?

KeyWords：?technology?of?extended?networking;MATLAB;spreadspectrumgain;outputsignal-to-noiseratio;stronganti-jammingability

目录

1前言1

1.1本设计的目的、意义及应达到的技术要求2

1.2本设计在国内外的发展概况及存在的问题 3

1.3本设计应解决的主要问题4

2本设计4

2.1设计原理 5

2.2方案选择6

2.3设计过程 7

3结论10

参考文献12

致谢13

附录14

PAGE4

前言

扩展频谱通信，简言之，便为扩频通信。该技术使用伪随机码，从而得出电射频信号比基带信号的频带宽度大得多。伪随机码与其他代码的不同之处便是与信息无关，可以直接序列扩频、