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1、吉林电子信息职业技术学院毕业设计译文题目：扩频通信技术译文姓名：罗京京专业班级：工业自动化指导教师：常兆盛讲师完成时间：2012年6月-13-Aspreadspectrumcommunicationtechnology1.1spreadspectrumcommunicationsystemoverviewSpreadspectrumcommunication,namelythespreadspectrumcommunication(SpreadSpectrumCommunication),andopticalfibercommunication,satellitecommun
2、ication,togetherknownasenteringtheinformationageofthreebighigh-techcommunicationtransmissionmethod.Spreadspectrumcommunicationistotransmitinformationdatabythepseudorandomcode(spreadspectrumsequence:SpreadSequence)modulation,realizationofspreadspectrumandtransmission;receivingendusesthesamec
3、odedemodulatorandrelatedtreatment,recoveryoftheoriginalinformationdata.Thiscommunicationmodeandtheconventionalnarrowcommunicationmodearedifferent:oneistheinformationspreadspectrumaftertheformationofbroadbandtransmission;twoisrelatedtorecoveryaftertreatmentintonarrowbandinformationdata.Itisd
4、uetothetwoholdingpoint,makethespreadspectrumcommunicationhasthefollowingadvantages:highantijammingnoiseantimultipathfadingwiththeconfidentialityofthepowerspectraldensityislow,hasthenatureofconcealmentandlowprobabilityofinterceptcanbemultipleaccessmultiplexingandarbitrarylocationofhighprecis
5、ionmeasurementBecauseofthespreadspectrumcommunicationtechnologyhastheadvantagesoftheUnitedStatesArmy,from50timemetaphasebeginsstudyconvenientformilitarycommunications,hasbeentheexclusive,widelyusedinmilitarycommunication,electroniccountermeasureandnavigation,measurementandotherfields.Untilt
6、heearly80'sbeforebeingusedincivilcommunicationfield.Inordertomeetthegrowingneedsoftheciviliancommunicationcapacityandtheefficientuseofspectrumresources,allcountrieshavemadeindigitalcellularmobilecommunications,mobilesatellitecommunicationsandfuturepersonalcommunicationusingspreadspectrumtec
7、hnology,spreadspectrumtechnologyhasbeenwidelyusedincellularphones,cordlesstelephone,microwavecommunications,wirelessdatacommunication,remotesensing,monitoring,alarmsystemTwospreadspectrumcommunicationthebasicconcept-13-2.1spreadspectrumcommunicationsThes
