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1、英文资料原文INTRODUCTIONOFGSM一、GSMimplicationTheGSMfullnameis:GlobalSystemforMobileCommunications,Chineseasthewholeworldtwo-waychargesforcellularphonessystem,thepopularname"thewholeworldpasses",isonekindstemsfromEurope'smobilecommunicationtechnicalstandard,isthesecondgenerationofmobilecommunicati
2、ontechnology,itsdevelopmentgoalisenablestheworldtobepossibletouseamobilephonenetworkstandardtogether,letstheuseruseahandsettobeablegoodthewholeworld.Ourcountryusedthistechnicalstandardintheearly-1990sintroduction,beforethisusesthehoneycombsimulationmigrationtechnology,namelythefirstgenerati
3、onofGSMtechnology(onDecember31,2001ourcountryhasclosedsimulationmigrationnetwork).Atpresent,Chinamoves,ChinaUnicomtohaveaGSMnetrespectively,forworldbiggestmobilecommunicationnetwork.GSMsystemincludingGSM900:900MHz,GSM1800:1800MHzandGSM1900:1900MHzandsoonseveralfrequencybands.GSM(wholeworldm
4、obilecommunicationsystem)isonekindwidelyappliesinEuropeanandtheworldotherplacenumericmovetelephonesystem.WhatGSMuseisthetimedivisionmultipleaccessanomalousform,anditisthepresentthreekindofdigitalcordlessphonestechnology(TDMA,GSMandCDMA)usesthemostwidespreadonekind.GSMdigitizesthematerial,an
5、dcarriesonthedatathecompression,thentransmitstogetherwithothertwouserdatastreamfromthechannel,othertwouserdatastreamhastherespectivetimeslot.GSMinfactisEurope'sradiotelephonestandard,JointboardreportedaccordingtoGSMtheMOU,GSMhas1,200,000,000usersinthewholeworld,andtheuserproliferatesmoretha
6、n120countries.BecausemanyGSMnetworkoperatorhastheroamingagreementwithotheroverseasoperators,thereforeworksasuserafterothercountries,stillmightcontinuetousetheirmobilephone.AnAmericanFamousCorrespondenceCompanySprintAuxiliaryunit,theAmericanperson-to-personcommunicationisusingGSMtotakeonekin
7、dofwidebandperson-to-personcommunicationservicethetechnology.Thiskindofperson-to-personcommunicationservicefinallyforEricsson,MotorolaaswellasNokiathehandsetwhichproducesisestablishingmorethan400basedepotsnow.Handsetincludestelephone,shortnotebeeperandin
