電子類(外文翻譯)-小靈通簡介introduction-phs-phones畢業(yè)論文

IntroductionPHSphonesPHSphoneisaminiatureofthe1900MHzradiotransceivercallmachine.Transmittingpoweronly10mw,minimalradiation,theonlymobilephonehandset1/200,itis"greencommunicationstool,"said.1,features①,murmurofsmall,clearsoundquality,canthecityandsoundqualitycomparabletofixedtelephone,andconfidentialitythanfixedtelephonestrong.②,pcallcanbecalledanytime,anywhere,andwithotherPHSphonecallsdirectly.⑧,LCDdisplaysareanumberofbackgroundlight,easytowatch.④,atelephonedirectoryfunction,ringingsoundchoice,volumecontrol,andotherfunctions.⑤,haveabuttonontheredialfunction.⑥,thelargestPHSphonescanbeafeatureofthehomephoneorofficephonehasaphonenumber,fromonesideoftheotherpartycanautomaticallycutoff,topreventeavesdropping.PHSphonescanalsohaveavirtualnumber,sohomeorofficephoneandPHSphonescancalleachother.2,theband①,1895MHz-1906.1MHzallocatedtotheprivatenetwork②,1906.1MHz-1918.1MHzdistributiontothepublicnetworkEachcarrierfrequencyof300KHzbandwidthisavailableonthebandfrequencyis77,eachdistrictstationusedbythecarrierfrequencyof:f=1895.1+0.36X(N-1)MHzintheN-typeforthecarrierfrequency,,Therangeis1-77,ffortheuseoftheairwiththecorrespondingfrequencyNForexample:CarrierfrequencyN=If=1895.1MHzCarrierfrequencyN:2f=1895.46MHzCarrierfrequencyN=3f-1895.82MHzCarrierfrequencyN=77f=1922.46MHz3,thephonemodeling①,thetotalweight:80~90g(pluspanelsoflessthan200g)②,size:twosmallboxessomuchfirewood⑧,powersupplycapacity:continuoustalktimeofabout8h,inastatereceptionfor500h④,thePHSmodelscurrentlyavailableinthemarketmainlyUTS702-P,UTS602-A,UTS702-S331,UTS708-J,UTS708-SY,andsoon.4,"LittleSmart"mobilephonefunctionsPHSphonestherearethreemainseries:1),UTS700(popular)seriesofmobilephones,alow-costmobilephones,LCDsmaller,onlyfiguresshowthattherearefourkindsofringingand20kindsofmusic,canstorefivecallshavebeenrecordedandfivepullingphonerecords,phonebookcanbeStore20phonenumbers.Thephonehasbeeneliminated.2),UTS702(charisma)phones,mobilephonesaremid-rangeandmedium-sizedLCDChinese/English,inadditionto700series,alsoafunctionoftime,vibration,hands-free,voicerecording,voiceanddatacommunications.Representativemodelshave702,702-331.3),UTS708(scenery)phones,ahigh-endmobilephones,large-screenLCDChinese/English,canstore500phonenumbers,textmessagetosupporttheChinesecharacterinput.Second,thePHSmobilephonetechnologywiththeprincipleofindicators1),thetechnicalindicatorsPHSTransmittingpower:10mw(average),80mw(peak)Frequency:1895.150~1917.950MHzSensitivity:lessthan16db~V(≤97dbm)Airinterface:RCRSTD-28Version2Carrierinterval:300KHzCommunication:TDMA/TDDModulation:n/4QPSKTransferrate:384KbpsVoiceencoding:32KbpsADPCMMelodyoutput:inthegreatvolumewhen>73dbTonefrequency:2800HZ,1800HZZhenchang:5ms2),PHSphonecallswereworkingprincipleofbreath1,PSPHSbreathprocess①,when-?userstocallinthePSonthedial-upandsentoutifallthewirelesschannelarealreadyoccupied,itwillhearthevoices,otherwisePSexhaledinformationputintotheagreementPHSphonenumber,andTheinformationtransmittedtotheRP.②,RPPStoreceivewirelesslinkcamethroughtheinformation.⑧,RPwillreceiveinformationthroughwiredconnectionstotheRPC(basestationcontrollers).④,RPCPHSagreementinformationwillbeconvertedtoanagreementQ.931information.Inaddition,RPC(basestationcontrollers)fromtheoutputofinformationextracteddial-upcodeandputitintoDTMF(dual-tonemulti-frequency)signals,Q.931agreementbyaE1lineoftheD-channelsenttotheRT(infrastructureequipment).⑤,whenRT(infrastructureequipment)toreceiveinformationbreath,ittranslatestheinformationtoselectandconnecttothelocalexchange,thecorrespondinganaloglineinterface,andaccesstoinformationgiventotheRPC.RPCpaththroughthevoiceoftheDTMF(dual-tonemulti-frequency)dial-upsignaltotheCentralBureauofswitches,afterthecompletionofdial-up,RPCandRPCentrewillswitchbetweenthePSandthepathtolinkupallthevoice.Calledpartyphoneringingandpick,exhaledtheendoftheprocess,andthemaincallcanbecalledmutualconversation.2,PSpeopleprocesscalledPHSThisfeatureprovidesaPStothebasicprocessofincomingterminals.ThroughtheestablishmentofafunctionalequivalentofincomingRTregionalpagingservicearea.①,incoming,thesimulationofaparticularlineringing.②,RT-detectedbellandtheincomingflowofinformation,togetherwithQ.931agreementgavethecallnumberRPC.⑧,whentheRPCreceivedfromtheRT-senttotheinformation,itwillQ.931agreementgavethecallnumberRPC.④,thesecallsallthemobilephonebasestations(PS)andFSU,whenthepagernumberandthecorrespondingPSreceivedfromtheRPofthepaginginformation,itimmediatelyringing.Ifthedestinationtelephonepick,picksignalthroughtheRP,RPCandRTtransmittedtothecentralswitch,allthevoicepathhasalreadyestablished,sotheusersconnectedtoeachotheronbothsidesofthecall.3,AuthenticationAuthenticationfunctionforthepreventionofprivateuserswastherightnumberofofficers.Authenticationfunctioninthebreath,incomingandlocationoftheimplementationoftheregistrationprocess.Telephoneusersintheapplication,operatingChamberofCommercefordistributionofauser'sphonenumberonlyauthenticationcode.RT-alltheauthenticationcodestoredinitsdatabase,PSeachhavetheirownauthenticationcode.WhentheRPCreceivedfromtheRT-afteranauthenticationcode,willperformthefollowingfunctions:①,generatearandomcode-basedauthenticationandtosendittothePS②,toreceivetheresultsfromthePS⑧findingsandtheresultssenttotheRTandinspectionresults.4,thehandoffThisfeatureformobilephonesfromthestateoftheRTserviceareaofaregionmovingtootherareastoprovidecontinuouscommunicationsservices.TheRPCservicesinthesameregionofthehandoff,donothaveanyRT-operationcanbeconnectedtothecommunicationchanneltoswitchtoanotherRPcontroloftheregion.RPCindifferentareasbetweentheswitch,thenewRT-RPCtosendinstructionstoestablishthehandoffofinformation,RTandthensenttothenewRPCtoconnectinformation,andtosendtheoriginalRPCrewirableinformation.PHShandsetitselfhasmanyautomaticfeatures,intheoriginalcallcutoffbeforethechannel,theywillchooseanewbasestations,re-establishaconnectionchannel,inthisprocessdoesnotrequireanetwork-monitoringwirelesslinks.Thisre-establishtheconnectionchannel,eveninRPcallservicesduetoinconsistencyinthebordercausedseriousqualitywirelesslinksandvicious,canprovideastablecommunicationservices.C),thePHSmobilephonecircuitprinciplePHSphonesprinciplecircuitdiagramshowninFigure1-1:Picturethissubjectareasfollows:PHSphonesistheworkinthe1900MHzbanddigitalphone,withitscircuitstructureisverysimilartotheGSMhandsets,basecircuitcanberoughlydividedintothreeparts:ahigh-frequencypartofthelaunchandreceiveparts:acontrollogicpartofthetransmissionTheinterface,man-machinedialoguesegment,followedbythepowerpart.PHSphonesbecauseofthedegreeofintegrationverygood,inmanypartsofacompleteintegratedcircuits.1,RFSystem(1),partofthetransmitterTransmittersinpartbyquadraturemodulatorfiredpoweramplifiers,transceiversswitchandband-passfiltercomponents.①quadraturemodulator(1C101)Quadraturemodulatorfromquadraturemodulatorintegratedcircuitcomponents.Byorthogonalfrequencymodulationintegratedcircuitsenterbasicinstructionsignal,aftertwomixeroutput,hasreceivedatransferquadraturemodulatoroutput.QuadraturemodulatorintegratedcircuitsusingaDCvoltageoutputunit(automaticlevelcontrol)controltheoutputintensity.Throughthecycleofcontrol,getaconstantintensityoftheoutput.IfithasthebestDCvoltageontheoutputfromthecontrolmodule.②firedpoweramplifier(1C051)Quadraturemodulatoroutputintothemonolithicmicrowaveintegratedcircuits,andthenenlargeittosendthenecessarystrength.Monolithicmicrowaveintegratedcircuitsbychangingthethresholdvoltage,cancontroltheoutputpowerandcurrentconsumptionlevels.⑧transceiverSwitching(1C001)Transceivercircuitswitchconnections,maychoosetosendorreceivethetimeswitch,toconnectwiththeantenna.④band-passfilter(FL051)Sothatbyorthogonalmodulatorsignalintheterminalbeforetheyreachtheantennathroughtheband-passfiltertoreduceinterference,suchasthemirrorinterference,nonlinearharmonicinterference,andsoon.(2)ofthereceiverToreceivepartoftheband-passfilterfront-endintegratedcircuit,mixingthreecomponents.①band-passfilterBand-passfilterincludingdielectricfilters(FL00t),SAWfiltersurfaceacoustic(FL033),ceramicfilters,etc.(FLl01).DielectricfiltersfilteringIFsignalateveryleveltoreducedonotwanttoreceivethesignalfromtheband.CeramicfiltermadeofceramicmaterialsusedhighQband-passfilterfiltersecond-classIFsignaltoreducedonotwanttoreceive,suchasadjacentchannelinterference.SurfaceAcousticSAWfilter,thefrequencywithspecificcharacteristicscanreplacethetraditionalLEabsorptionandsingle-loop,double-tunedcircuit.②front-endmixerIC(1C00Asia)LNAICincludingfront-endmixerandamixer.Theone-outputⅡ.6GHzbandandreceivethe1.9GHzbandsignalmixing,mixing,wasanintermediatefrequencysignallosersOutthroughthemediafiltertothenextlevelaftermixingcircuit.⑧mixingtwoparts(1CⅡ01)ParttwoincludesamixerIFamplifier,twomixers,twointermediatefrequencyamplifiers,limitingamplifierandreceivercarrieridentificationsignals,andotherfunctions.2IF10.8MHz,thesignalthroughceramicfilters,IFamplificationandlimitingamplifierintheenlarged,thefinalsignalfromtheintermediatefrequencysignaltransmittedtothecontrolunit.RSSI(receivedsignalstrength)toreceivesignalsthroughLevelIntoaDCvoltagethroughthisvaluetoidentifyacarriersignal.2,logiccontrolsystem(1C80b)Partoftheagreement,includingcontrolunit,voiceprocessingpartofthesubsidiaryunit.(1)agreementunitAgreementbythechanneldecoderunit,conditioningunit,thecentralprocessingunit,read-onlymemory,randomaccessmemorycomponents.①channeldecoderunitChanneldecodermodulesareasfollows:modulationoftheradiofrequencymodulationunitsenttotheintermediatefrequencysignal,TDMA/TDDunitstodealwiththecollectionofdatatransmissionandreceptionofdataseparation,fromtimetotimethroughthecontroloftheradiofrequencymodulesⅡ9.2MHzoutputTheclockfrequency,incontrolofoperationsatthesametime,thepowercontrolunittoprovidepowercontrolsignalsintheoutput,suchasPLL-3V,PTX-3V,RX-3V,TCXO-3V,toprovideradiofrequencymodulestransmitandreceivethesupportofPower,PLLunitusedtoexchangeallkindsofcontrolsignals:IfLE,CLK,PSⅡ,PS2,LD,andsoon.RFmodulesforthePLLfrequencyintegratedcircuitsprovidesettings.②conditioningunitConditioningunitsfromthefollowingcomponents:forπ/4frequencyshiftkeyingsignaltoprovideidentificationtoreceivesignalstrengthofthecarriertoidentifythemanagementunit,andtransmitpowercontrolunit.③centralprocessingunit,read-onlymemory,randomaccessmemory(1C8041c803)CPUsforexternalflashandabuilt-in(address)ofrandomaccessmemorytoprovideagreement.Italsoprovidestheinterfacewithotherunits,suchasvoicecodecsmodulesandrelatedmodules.(2),voiceprocessingpartVoiceprocessingpartbythedecodingunitandavoiceinterfacecircuitcomponents:①voicedecoderunitVoicedecodingunitnegativevoiceisencodedsignaldecoder,italsoprovidesadataerrorwhenthemutecontrolandsuppression,senttransmissiontoneoutput,suchasdialtone,busytone-Yinhe.Inaddition,byreducingtheconsumptionofcurrent,suspendedforeachunitoftheclocksignal,soastoachieveenergy-savingpurposes.②interfacecircuitInterfacecircuits,includingringingandhandsetpowercontrolunit,ringtonescontrolunit,andothercontrolcircuits.Theycontrolbysubsidiaryunits.(3),thesubsidiaryunitSubsidiaryunitsincludingtheapplicationofCPUunitIC804,electricalerasableread-onlymemory,IC803chip(addresscode,authenticationcode)andman-machineinterfacemodules.①ApplicationProcessorunitApplicationProcessorunitusedtocontrolprotocolmodulesandvoicecodinginterface,alsousedtocontrolwirelesscallstoacceptcontrolunit,keyboardinputmodules,liquidcrystaldisplaymodulesandperipheralcircuits,suchaslighting,andotherbackground.②ElectricallyErasableread-onlymemory(1C804)ElectricallyErasablememorystoredlargeamountsofdata,suchascodes,telephonedirectoryinformation,hardwaredata,dataterminals,andotherparameters.Throughthe3-wiretypeofinterfaceandapplicationofmicroprocessorstomaintaincommunications.③man-machineinterfaceunitMan-machineinterfaceunitincludingthedisplayunit,keyboardscanning,datainterfaceconnector.ParametricdataterminalsLCDdisplayunitandaliquidcrystaldisplaydriverintwoparts.Itcontrolledbytheapplicationofmicroprocessors,istodisplaysomeofthewirelessreceiverandpersonalportabletelephonetoreceivetheinformation,internalstate,andtheresponsetotheexternaloperatinginformation.Candisplaythreelinesof11numbers,anddirectthestatusshows0.Keyboardscanbya6:4compositionofthematrix,throughthecentralprocessingunittodetectexternalinputkeys.Arbitrarykeyresponsebythecentralprocessingunitisalsotestingakeyinputfromthedisruptionofthesignaltoachieve.Datainterfaceconnectorboxdataconnectivitythroughthedatainterfaceconnector(1C601),thecentralprocessingunitintheserialandindividualscanmaintaincommunicationsbetweencomputers.Thiswillbeabletoconvertasetoftestpatterns,andcanreadandwrite,read-onlymemoryandflashmemorycleanofdata.3,powermanagementsystems(1C901)Powerfroma3.6V,550mAhlithiumbatteries,electricityfromthepoweroftheIC-level,includingfiveindividualVregulator,a1.2Vregulatoranda3.3Vregulator,bycontrollingtheterminalswitchcontrol.RFsystemsusingthetransmissionsystemvoltage3.3V;Oscillator-drivenworkinthe1.2Vsourcevoltage;Buzzerandlight-emittingdiodecircuitsworkinthe3.6Vvoltage;Powerispartoftheactionthroughfiveregulatorof3Vvoltage,includingthelogicunit,voicemodulesandRFmodules,throughvariouscircuitsdistinctionbetweenthepowersupplyunit,willbeabletoinhibitinterferewitheachother.PHSandfromtheuseofmobilephones,boththroughthephone,throughwirelessdigitalwirelesscommunications.However,characteristicsofsystems,"mobilephone"locatedinMobile,throughadedicatedmobileswitchingnetworkwilllinktheservicearea,canprovideuserswithprovincial,nationalandglobalroamingserviceforfrequenttravelersorgreatermobilityofstaffProvideconvenient.ThePHSisafixedlocationinthecitytosupplementandextendthetelephone,mainlyrelyingonfixedtelephonenetworktoruraltourbanareasorneighbors,rarelyamissiontoprovidecustomersinthelocalregionalmobilecalls,mobilephonenumberisstillordinary8Thecity'sfixedtelephonenumber.Thecontrolpointsareasfollows:First,useandstructure1,bothinthestructureofasmall,lightweightarguments,easytocarry.2,PHSbecauseofthepowerconsumptionofsmall,continuoustalktimethanthemobilephonealongtimeandwaitingtimelonger.3,PHSlow-cost,theimplementationoftheone-waycharging,similartothepaymentoffixedtelephonecostsintheenjoymentofmobilephonecommunicationservices.4,PHSfixedlinephonefeaturesamobilephonefeatures.5,PHSphoneforcallerseithersideorthedestination,thecalliscompletedtoclickthebuttonhangup,otherwisejustasfixed-linemicrophonebuiltChahuangnotgood,thephonewillnolongerbeabletocall.6,PHSusedadial-upTDMAredialbutton,theredialbuttonbreathcanbere-issued.Second,thesystemfeaturesin1,becausethetwodifferentlocation,accesssystemsareverydifferent,themobilephonesystembythewireless,PHSandPASsystemisinterrupted,links,carriedoutbyShihuaWang.2,PHSsystemclothmicro-cellularnetwork,basestationstransmittingpowerisverysmall,netofcloth,whenstrongsignaltootherbasestations,mobilephonescanautomaticallyswitchtoanotherbasestations,switchingwillhaveabriefpausethecall,Mobilecallswillappearonetotwosecondsshortinterruption,donothavetohangupautomaticallyresumesoon,mobilephonesthanitisinadequate.3,themobilephonesystemisthecoremobileswitchingcenter(MSC)andthePHSsystemisthecorebasestationcontrollers(RPC),therearesimilarities.4,PASmodularsystem(VLSI),largecapacity,easeofinstallationandlowcost.Itenteredthecityprogram-controlledtelephonenetworkcostsavings.5,PHSmobilephoneandtwodifferentcommunicationsystems,theuseofmobilephonesarecompletelydifferent,sothatthephonecannotbefixedtelephonenetworktoportabletelephone,PHSphonescannotbethemobilephonenetwork.Communicationtechnology1,PASsystemisthewirelesschannelbetweentheuseofmobilephonebasestationsandmulti-carrierfrequencytimedivisionduplexmode(FDMA/TDD),TDMA-basedwirelesschannelstructure,inmanysub-bandfrequenciestoachievedynamicallocationtoeachbasestation1(frequency/time)channel.Thebasestationchannelutilization,savefrequencyresources.2,PASsystemintheswitchingandmobilephoneroamingbothtechnicallyandincommonhasitsowncharacteristics.PASsystemofuserdata,authenticationauthenticationdatabase,theendresultmemory,greatlysimplifyingaccessmemory,therebysavingthesysteminhardwareandsoftwarecosts.3,PASsystemuses1.9GHzmicrowaveband,soit'srelativelypoorpenetrationcapability,plustherelativelysmallpowerbasestations,only10mw\200mw\500mw,soindoorsignalcoverageisratherpoor,shouldcallwindoworascloseaspossibletoproperlyadjusttheposition.ButPHSphonetransmittingpowerverysmall(only10mw)convergenceisverysmall,onlytwomobilephone1.0%,willnotaffecthumanhealth,itis"greencommunications,"said.4,PHSusedJI/4QPSK90quadraturephaseshiftdifferentialcodingofthephase-shiftkeyingmodulation.Mobile,theshieldisusedGMSKGaussianminimumfrequencyshiftkeyingmodulationmethods.5,PASsystemthansimplemobilephonecodingsystem.SectionIIICircuitPHSphoneplansandstepstooverhaulFirst,thePHSmobilephonecircuitknowledgemapmethod1,radioandotherCircuitmapthemethodsandsteps1)OutlinepositioningPHSphonesuselarge-scaleintegration,orVLSI,itisfirstnecessarytoidentifythedrawingsontheusefulnessofintegratedcircuits,inpartwhatwhatrole,whatarethecharacteristics,andcanachievewhatkindoftechnicalindicatorstohelpthemaintenancepersonneltounderstandPrincipleoftheguidingideology,overallarrangementsandavarietyofhands-specificsteps.RFispartofthecircuitwhichtodistinguishDutufirstpartofareceiver,whichisacircuitlaunchoftheIntegratedcircuitsandpartsoftheroleoftheexternalcircuit.Iftheantennaswitchoutasignal,asignalintoaccountShouldbeasignalfromtheantennatoreceivesignalsfromthereception:getthesignalshouldbesenttothelaunchsignalpoweramplifier,antennaswitchfromthemaintransceiverswitchroles.2),theentiresub-zeroGeneralPlanwillbebrokendownintoseveralbasiccomponents,includingthelaunchofthereceptionofthecontrollogicpartofthepowersystem.Clarifyvariouspartsofthemainfunctionsofeachpartandwhatthebasicsmallunitfromthecircuit.Couldbeasimpleboxtoeachpartoftheroleandpartoftherelationshipbetweentheconnected.IFfocusedonthereceivercircuit,receivingthelocaloscillatorcircuit(RXVCO)andthelaunchoftheamplifiercircuit,andlaunchalocaloscillatorcircuit(TXVCO).Clearandspecificcircuitandpowersupply,controlandsignalinputellipsoidtothesituation.IntheprocessofdecompositionoftheCPCCentralCommittee,thedetailsofindividualcomponentsoraparticulartimeisnotdifficulttounderstand,thefuturecanbecarefullystudied,aslongastheplansgenerallyunderstandwhatarethemainmodulesinclude:alinkbetweenmodules,anditspowersupplysituation,andthisisKnowledgemapentry.3),tofindbackslightlyEachbasicunitofthecircuit,finditsDCCircuit,exchangelooposcillationcircuit,toenlargecircuittodeterminethestaticbiascircuit,thepointisappropriate,thetextofthenormalflowsignalscanzoominandcommunicate,leadsthesignaltogothroughWhatkindoffilter,andsoon.Forexample,therearetwomajorpartofRFsignals:toreceivesignalsandtransmitsignals.Aslongasthemastersignalreceptionandlaunchtheprocess,thephonewillbeabletounderstandthebasicprincipleoftheRFcircuit.Thereceivingprocess:1900MHzbandantennasignal→→→high-frequencyfilterhighfrequencyamplifier→mixer→IFfilter→IFprocessor(secondmixer→firstIFLarger→demodulator)→RXI/Q-Zone(channeldecoder)→audiosignalprocessing→speakers.Launchsignalprocessing:microphone→audiosignalprocessing→TXI/Qbaseband(ChannelCoding)→IFprocessing(modulation,thefirsttimeonthefrequency)→→IFfilteronthefrequency→→poweramplification→antennaswitch(TXchannel)→filtering-→antenna.4),Chest"mapping"Infrontofseveralstepsonthebasisofthevariouscomponentsofacomprehensive,circuitfromtheinputtooutputhasbeenlinkedtotheobservationofthesignalcircuitstepbystephowtoenlargeandtransfer.PowersupplysystemcomplexthanGSMmobilephones,respectivelyunderstandcircuit,thecircuithaveacompleteunderstanding.2,partofthelogiccontrolmethodsandstepstoknowmap1)clearthemainintegratedcircuitboardsinthelocation,suchasCPU,EEPROM,FLASHROM,suchasaudioprocessingmodule.2)checkthepowercabletoseehowthepowersupplytothechip,keyboardanddisplay.3)checktheclock(CLK)supplylines.4)investigationreset(RESET)supplylines5)investigationkeyboard,microphone,thehandsetdisplay,ringing/vibrationcircuit,backgroundlightinputandoutputaccesschannels,accessistheimportationofthesemultiplefaultzones.6)checkouttheCPUandothercontrolsignals:IfTX-ON,RX-ONsignals,andsoon.Thesestepsarenotfixed,notnecessarilytoanyofthecircuitsaresuitableforcellphones,andsometimesnotatallbetweenthestepsveryclearly,youcancross,canalsoreversetheorder,shall,inaccordancewithspecificcircumstancesflexibility.外文翻譯譯文：小靈通手機(jī)簡介小靈通手機(jī)是一臺微型的1900MHz無線收發(fā)通話機(jī)。發(fā)射功率只有10mw，輻射極小，僅移動電話手機(jī)的兩百分之一，所以有“綠色通信工具”之稱。1、特點①、雜音小，音質(zhì)清晰，完全可以和市內(nèi)固定電話音質(zhì)相媲美，而且保密性比固定電話強(qiáng)。②、可隨時隨地進(jìn)行呼p叫，并可與其它小靈通手機(jī)直接通話。⑧、LCD顯示屏號碼均具有背景燈，觀看方便。④、具有電話簿功能，振鈴音選擇，音量控制等功能。⑤、有按一次鍵的重?fù)芄δ?。⑥、小靈通手機(jī)最大的一個特點是可以與家用電話或辦公室電話共一個電話號碼，一方取機(jī)另一方可以自動切斷，防止竊聽。小靈通手機(jī)還可以擁有一個虛擬號碼，這樣家用或辦公室電話可以與小靈通手機(jī)互相通話。2、工作頻段①、1895MHz-1906.1MHz分配給專用網(wǎng)②、1906.1MHz-1918.1MHz分配給公眾網(wǎng)每個載頻所占的帶寬是300KHz整個頻段的可用載頻數(shù)是77個，每個小區(qū)站所使用的載頻為：f=1895.1+0.36X(N-1)MHz式中N為載頻號，范圍是1-77，f為空中使用的與N對應(yīng)的頻率例如：載頻N=If=1895.1MHz載頻N：2f=1895.46MHz載頻N=3f--1895.82MHz載頻N=77f=1922.46MHz3、手機(jī)造型①、總重量：80~90g(加電板小于200g)②、體積：2只小柴盒那么大⑧、供電容量：連續(xù)通話時間約8h，處于接收狀態(tài)時可為500h④、目前市面上的小靈通機(jī)型主要有UTS702-P、UTS602-A、UTS702-S331、UTS708-J、UTS708-SY等。4、“小靈通”手機(jī)的功能小靈通手機(jī)主要有三個系列：1)、UTS700(風(fēng)行)系列手機(jī)，屬低價位手機(jī)，LCD較小，只有數(shù)字顯示，有4種振鈴和20種音樂，可存儲5個來電記錄和5個已拔電話記錄，電話薄可存儲20個電話號碼。這種手機(jī)已經(jīng)被淘汰。2)、UTS702(風(fēng)采)系列手機(jī)，屬中檔手機(jī)，中型LCD中／英文顯示，除700系列功能外還具有時間、振動、免提、錄音功能，語音和數(shù)據(jù)通訊。代表機(jī)型有702、702-331。3)、UTS708(風(fēng)光)系列手機(jī)，屬高檔手機(jī)，大屏幕LCD中／英文顯示，可存儲500個電話號碼，支持短信息中文輸入。二、小靈通手機(jī)的技術(shù)指標(biāo)與工作原理一)、小靈通的技術(shù)指標(biāo)發(fā)射功率：10mw(平均)、80mw(峰值)頻率：1895．150~1917.950MHz靈敏度：小于16db～V(≤97dbm)空中接口：RCRSTD-28版本2載波間隔：300KHz通信方式：TDMA／TDD調(diào)制方式：n／4QPSK傳輸速率：384Kbps語音編碼方式：32KbpsADPCM鈴聲輸出：在音量很大時>73db鈴聲頻率：2800HZ、1800HZ幀長：5ms二)、小靈通手機(jī)呼人呼出工作原理1、PS小靈通呼出過程①、當(dāng)—?個用戶要打電話時，在PS上撥號并且發(fā)送出去如果所有的無線信道均已經(jīng)被占用，便會聽到聲音，否則PS就把呼出信息轉(zhuǎn)換成PHS協(xié)議的電話號碼，并且把信息傳送給RP。②、RP接收到PS通過無線鏈路傳來的信息。⑧、RP又將收到的信息通過有線連接送到RPC(基站控制器)。④、RPC將PHS協(xié)議信息轉(zhuǎn)換為Q.931協(xié)議信息。此外，RPC(基站控制器)還從輸出信息中提取撥號代碼并把它轉(zhuǎn)換成DTMF(雙音多頻)信號，Q.931協(xié)議信息通過E1線的D-信道傳送到RT(局端設(shè)備)。⑤、當(dāng)RT(局端設(shè)備)接收到呼出信息時，它對該信息進(jìn)行轉(zhuǎn)換，選擇并接通到本地交換局相應(yīng)的模擬線接口，并把接通的信息回送給RPC。RPC通過話音路徑把DTMF(雙音多頻)撥號信號送到中心局交換機(jī)，完成撥號之后，RPC和RP將中心交換機(jī)和PS之間的所有話音路徑連接起來。被叫用戶電話振鈴并摘機(jī)，呼出過程結(jié)束，主呼方和被呼便可相互交談。2、PS小靈通呼人過程此功能提供了向PS終端呼入的基本過程。通過呼入功能建立一個相當(dāng)于RT服務(wù)區(qū)的尋呼區(qū)域。①、呼入時，一特定的模擬線振鈴。②、RT端檢測到鈴流并且把呼入信息連同Q.931協(xié)議的呼叫號碼送給RPC。⑧、當(dāng)RPC接收到從RT端發(fā)送來的信息時，它將Q.931協(xié)議的呼叫號碼送給RPC。④、這些基站呼叫所有的手機(jī)(PS)和FSU，當(dāng)與尋呼號碼對應(yīng)的PS接收到了來自RP的尋呼信息，它就馬上振鈴。如果被叫電話摘機(jī)，摘機(jī)信號就通過RP、RPC和RT傳送給中心交換機(jī)，所有的話音路徑即已建立，這樣接通的用戶雙方就可以互相通話了。3、鑒權(quán)鑒權(quán)功能用于防止私人用戶號碼被無權(quán)的人員使用。鑒權(quán)功能是在呼出、呼入和位置登記過程中執(zhí)行的。用戶在申請電話時，運營商會為用戶電話號碼分配一個惟一的鑒權(quán)碼。RT端將所有的鑒權(quán)碼儲存在它的管理數(shù)據(jù)庫里，每個PS都有各自的鑒權(quán)碼。當(dāng)RPC從RT端收到一個鑒權(quán)碼之后，便執(zhí)行以下功能：①、產(chǎn)生一個隨機(jī)的鑒權(quán)碼型并把它發(fā)送給PS②、從PS接收計算結(jié)果⑧檢查結(jié)果并且向RT發(fā)送計算結(jié)果和檢查結(jié)果。4，越區(qū)切換此功能為移動狀態(tài)下的手機(jī)從RT服務(wù)區(qū)的一個地區(qū)移動到其他地區(qū)提供連續(xù)的通信服務(wù)。對于在同一個RPC服務(wù)區(qū)內(nèi)的越區(qū)切換，不需要在RT端進(jìn)行任何操作就可以把連接著的通信信道切換到另一個RP控制的區(qū)域。對于在不同RPC之間的越區(qū)切換，新的RPC向RT端發(fā)送指示越區(qū)切換的建立信息，然后RT向新的RPC發(fā)送建立連接的信息，而向原來的RPC發(fā)送拆線信息。PHS手機(jī)本身有許多自動執(zhí)行的功能，在切斷原來的通話信道之前，它們會選擇新的基站，重新建立連接信道，在此過程中不需要在網(wǎng)絡(luò)端監(jiān)控?zé)o線鏈路。這種重新建立的連接信道，即使在RP服務(wù)邊界由于呼叫不一致性而引起無線鏈路質(zhì)量嚴(yán)重惡性化時，仍可提供穩(wěn)定的通信服務(wù)。三)、小靈通手機(jī)電路工作原理小靈通手機(jī)即為工作在1900MHz頻段的數(shù)字手機(jī)，其電路結(jié)構(gòu)上與GSM手機(jī)很有類似之處，基電路大體可分為三部分：高頻部分有發(fā)射部分和接收部分：控制邏輯部分有傳輸部分的接口、人機(jī)對話部分；其次是電源部分。因為小靈通手機(jī)集成化程度很好高，很多部分都在一塊集成電路里完成。1、射頻系統(tǒng)(1)、發(fā)射機(jī)部分發(fā)射機(jī)部分由正交調(diào)制器、發(fā)射功率放大器、收發(fā)切換開關(guān)和帶通濾波器組成。①正交調(diào)制器(1C101)正交調(diào)制器由正交調(diào)制集成電路組成。通過正交調(diào)制集成電路輸入基本頻帶指令信號，經(jīng)過二級混頻輸出，獲得一個已調(diào)正交調(diào)制輸出。正交調(diào)制集成電路采用一個直流電壓輸出單元(自動電平控制)控制輸出強(qiáng)度。通過循環(huán)控制，就能得到恒定強(qiáng)度的輸出。如果它的直流電壓已達(dá)到最佳，就從控制模塊中輸出。②發(fā)射功率放大器(1C051)正交調(diào)制器的輸出進(jìn)入單片微波集成電路，然后放大到發(fā)送所需的強(qiáng)度。通過改變單片微波集成電路的門限電壓，可以控制消耗電流和輸出功率等級。⑧收發(fā)切換開關(guān)(1C001內(nèi))收發(fā)切換開關(guān)連接電路之后，可選擇發(fā)送或者接收的時間切換，以便與天線接通。④帶通濾波器(FL051)使通過正交調(diào)制器的信號在到達(dá)天線終端前先通過帶通濾波器，能減少干擾，如鏡象干擾，非線性諧波干擾等。(2)接收機(jī)部分接收部分由帶通濾波器前端集成電路，三級混頻組成。①帶通濾波器帶通濾波器包括電介質(zhì)濾波器(FL00t)、SAW聲表面濾波器(FL033)、陶瓷濾波器等(FLl01)。電介質(zhì)濾波器過濾每一級中頻信號，以減少不希望接收到的偏離頻帶的信號。陶瓷濾波器采用陶瓷材料制成高Q值帶