论码分多址通信系统、扩频通信外文翻译

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1、论码分多址通信系统、扩频通信外文翻译论码分多址通信系统、扩频通信外文翻译导读：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论码分多址通信系统、扩频通信外文翻译(2)导读：ofspreadinggain,alsoknosystemitselfancecharacteristicsultipleaccessCodedivisionmultipleaccess(CDMA)isachannelaccessmethodusedbyvariousradiomherneoreapplicabletoputerageinf

7、ormationtransmission.municationinthemostdigitalcircuits,equipment,highlyintegrated,easyinstallation,easymaintenance,butalsoverypactandreliable.TheaveragefailureratenotimemunicationsystemSpreadspectrummunication,namely,spreadspectrummunications(Spreadspectrummunication),unications,s

8、alitemunications,ationagea