浅谈关于移动通信发展趋势-毕业论文外文翻译

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1、TalkaboutthedevelopmenttrendformobilecommunicationsOne，introduction:Mobilecommunicationmeansbetweenthemobileusers，ormobileusersandfixedcommunicationsbetween.，Withthedevelopmentofelectronictechnology，particularlysemiconductors，setsDevelopmentofcircuitandcomputertechnologyandmob

2、ilecommunicationshaveenjoyedrapiddevelopment.Withtheexpansionofitsapplicationfieldsandonimprovingtheperformancerequirements，allowmobilecommunicationintechnologyanddevelopmentofthetheorytoahigherlevel.Sinceinthe1980softhe20thcentury，themobilecommunicationshavebecomeindispensabl

3、einmoderncommunicationnetworkandoneofthefastestmeansofcommunication.Reviewingthedevelopmentofmobilecommunications,mobilecommunicationsdevelopmentthroughseveralstagesofdevelopment:thefirstmajorcellularmobilecommunicationtechnologyofanalogmobilecommunications,thetechnicalcharact

4、eristicsofCellularnetworkstructureovercometheregionalcapacitylow,restrictedthescopeofactivitiesoftheproblem.SecondGisthecellularmobilecommunications,cellularsystemscanprovideintegratedservicedigitaltransmission,andotheradvantages.MainCharacteristicsofthirdGisinadditiontoprovid

5、ingsecondofmobilecommunicationsystemownadvantages，overcomeitsshortcomings，butcanalsoprovidebroadbandmultimediaservicecanprovidehigh-qualityvideomultimediaintegratedservices，andglobalroaming.Withmostofthemarenowsecondtechnology,thirdtechnologyisstillnotverysuccessful,buttherear

6、ealreadyfourthtechnologyvision.4Gstandardwithmorethanthirdofthefourthmobilecommunicationsystemfunction.。Two.4Gaboutmobilecfourththeconceptofmobilecommunicationtechnologiesasbroadbandaccessanddistributionnetwork,withasymmetryover2Mbitsdatatransmissioncapacity.Itconsistsoffixedb

7、roadbandwirelessaccessandbroadbandwirelesslocalareanetwork，mobilebroadbandsystemandinteractivebroadcastingnetwork,fourthGstandardsthanthirdstandardhasmorefunctionality.Indifferentfixedfourthg，wirelessplatformsandwirelessservicesacrossdifferentfrequencybandnetwork,inanyplacewit

8、hbroadbandInternetaccess,includingsatellitecommunicationandst