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1、論碼分多址通信系統(tǒng)、擴(kuò)頻通信外文翻譯論碼分多址通信系統(tǒng)、擴(kuò)頻通信外文翻譯導(dǎo)讀：n,orevennegativeinthesignal-to-noiseratioconditions,canalsosignalfromthenoisedrounicationssystems,spreadspectrummunicationssystems,spreadspectrummunicationisonlyabletomunicationSpreadspectrummunication’sbasiccharacteristics,isusedtotransmitinf
2、ormationtothesignalbandinimum(effective)bandodulation,GPvalueintheareamorethan10times,collectively,the“narrounication”,andspread-spectrummunicationGPvaluesashundredoreventhousandsoftimes,canbecalled“broadbandmunication”.Duetothespread-spectrumsignal,itisveryloitters,transmissionspa
3、cemostlydroe(orrandomPNcode)receiver,Gaincanbedealtetheoriginalsignal.1.2Thetechnologysuperiorityofspread-spectrummunication.Stronganti-interference,biterrorrateislomunicationsystemduetotheexpansionofthetransmittersignalspectrum,thereceiverdespreadingreductionsignalproducedspreadin
4、ggain,therebygreatlyenhancingitsinterferencetolerance.Underthespreadinggain,orevennegativeinthesignal-to-noiseratioconditions,canalsosignalfromthenoisedrounicationssystems,spreadspectrummunicationssystems,spreadspectrummunicationisonlyabletounication.Anti-multi-pathinterferencecapa
5、bility,increasethereliabilityofsystem.Spread-spectrumsystemsasusedinthePNhasagoodcorrelation,correlationisveryissionsignalcaneasilybeseparatedandmayintimeandre-alignmentphase,formationofseveralsuperimposedsignalpoprovingthesystem’sperformancetoreceiveincreasedreliabilityofthesystem
6、.Easytousethesamefrequency,improvingtheutilization.Amunications,voicepressionandmanyot5論碼分多址通信系統(tǒng)、擴(kuò)頻通信外文翻譯(2)導(dǎo)讀：ofspreadinggain,alsoknosystemitselfancecharacteristicsultipleaccessCodedivisionmultipleaccess(CDMA)isachannelaccessmethodusedbyvariousradiomherneoreapplicabletoputerageinf
7、ormationtransmission.municationinthemostdigitalcircuits,equipment,highlyintegrated,easyinstallation,easymaintenance,butalsoverypactandreliable.TheaveragefailureratenotimemunicationsystemSpreadspectrummunication,namely,spreadspectrummunications(Spreadspectrummunication),unications,s
8、alitemunications,ationagea
