基于matlab的am信号的调制

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1、高频大作业基于MATLAB的AM信号的调制16高频大作业摘要：现在的社会越来越发达，科学技术不断的在更新，在信号和模拟电路里面经常要用到调制与解调，而AM的调制与解调是最基本的，也是经常用到的。用AM调制与解调可以在电路里面实现很多功能，制造出很多有用又实惠的电子产品，为我们的生活带来便利。在我们日常生活中用的收音机也是采用了AM调制方式，而且在军事和民用领域都有十分重要的研究课题。本文主要的研究内容是了解AM信号的数学模型及调制方式以及调制结果的分析。不同的调制系数对调制的影响以及单频信号和多频信号调制的不同点。先从AM的调制研究，研究它的实现方法及功能。其次研究不同的调

2、制系数下，对已调波的频谱进行分析与研究，探究其与功率的关系。最后再通过建立数学模型分析功率关系，与前面得出的结论作对比，最终得出正确的结论。利用MATLAB编程语言实现对AM信号的调制，给出不同调制系数情况下的调制结果对比。关键词：AM信号，调制，调制系数，功率，MATLAB16高频大作业ModulationofAMsignalbasedonMATLABAbstract:Societybecomesmoredevelopednow,scienceandtechnologyintheupdate,inwhichsignalandanalogcircuitsoftenusedi

3、nmodulationanddemodulation,andAMmodulationanddemodulationisthemostbasic,isalsofrequentlyused.Toparticipateintheidentificationofsuchartificialmethods,therulingincludessubjectivefactors,willvaryfrompersontoperson,canidentifythetypeofmodulationisverylimited.Automaticmodulationrecognitiontechn

4、ologycanbeovercomenotonlytoparticipateinrecognitionofartificialdifficulties,andthecenterfrequencyandbandwidthoftheestimationerror,adjacentchannelcrosstalk,noiseandinterferencefactorssuchasthedeclineofeffectisrelativelyrobust.UsingAMmodulationanddemodulationcircuitwhichcanachievealotoffeatu

5、res,creatingalotofusefulandaffordableelectronicproducts,inordertofacilitateourlives.UsedinourdailylivesistheuseofAMradiomodulation,butalsointhefieldofmilitaryandcivilianresearchtopicsareveryimportant.ThemaincontentofthispaperistounderstandthemathematicalmodeloftheAMsignalandthemodulationan

6、dthedemodulationmethod.Demodulationdifferentmethodsindifferentcircumstancesofthedemodulationsignaltonoiseratiotheresultsofmethodsthatbetter,tomakethecomparison.RequirementismorethandoublethesoundandtheAMsignalmodulationanddemodulation.AMmodulationfirststudyofitsfunctionandinreallifeuse.AMd

7、emodulationfollowedbyresearch,aswellassomerelatedknowledge,aswellasthroughitsuseofcommunicationsmorein-depthunderstandingofit.AMsignalfromthetoneofthemathematicalmodelandthemodulationanddemodulationmethods,thetwo-toneAMsignaltodrawamathematicalmodelandtheblock