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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,sa
2、tellitecommunication,togetherknownasenteringtheinformationageofthreebighigh-techcommunicationtransmissionmethod.Spreadspectrumcommunicationistotransmitinformationdatabythepseudorandomcode(spreadspectrumsequence:SpreadSequence)modulation,realizationofspreadspectrumandtransmissio
3、n;receivingendusesthesamecodedemodulatorandrelatedtreatment,recoveryoftheoriginalinformationdata.Thiscommunicationmodeandtheconventionalnarrowcommunicationmodearedifferent:oneistheinformationspreadspectrumaftertheformationofbroadbandtransmission;twoisrelatedtorecoveryaftertreat
4、mentintonarrowbandinformationdata.Itisduetothetwoholdingpoint,makethespreadspectrumcommunicationhasthefollowingadvantages:highantijammingnoiseantimultipathfadingwiththeconfidentialityofthepowerspectraldensityislow,hasthenatureofconcealmentandlowprobabilityofinterceptcanbemultip
5、leaccessmultiplexingandarbitrarylocationofhighprecisionmeasurementBecauseofthespreadspectrumcommunicationtechnologyhastheadvantagesoftheUnitedStatesArmy,from50timemetaphasebeginsstudyconvenientformilitarycommunications,hasbeentheexclusive,widelyusedinmilitarycommunication,elect
6、roniccountermeasureandnavigation,measurementandotherfields.Untiltheearly80'sbeforebeingusedincivilcommunicationfield.Inordertomeetthegrowingneedsoftheciviliancommunicationcapacityandtheefficientuseofspectrumresources,allcountrieshavemadeindigitalcellularmobilecommunications,mob
7、ilesatellitecommunicationsandfuturepersonalcommunicationusingspreadspectrumtechnology,spreadspectrumtechnologyhasbeenwidelyusedincellularphones,cordlesstelephone,microwavecommunications,wirelessdatacommunication,remotesensing,monitoring,alarmsystemTwospreadspectrumcommunication
8、thebasicconcept-13-2.1spreadspectrumcommunicationsThes
