二分之一連續(xù)頻率切普鍵控及性能分析.pdf

1、哈爾濱工程大學碩士學位論文二分之一連續(xù)頻率切普鍵控及性能分析姓名：王鵬宇申請學位級別：碩士專業(yè)：通信與信息系統(tǒng)指導教師：孫國志20120316二分之一連續(xù)頻率切普鍵控及性能分析ABSTRACTWiththerapiddevelopmentoftheinformationsocietypeoplehavesetrequirementsforhigherdatarateOwingtothelimitationoffrequencyresou

2、rcesandlowerbandefficiencyit’SimperativetosolvetheconflictbetweenscarcityofthespectrumresourcesandtheurgentdemandforhighcapacitydigitalcommunicationsystemsAfterWalkerproposedanewmodulationapproachnamedasVariablePhaseShif

3、tingKeying(VPSK)，UltraNarrowBand(UNB)asanewtypeofwirelessdigitalmudulationtechnologywhoseenergyishighlyconcentratedisbecomingahotissueUsingtheideaofVeryMinimumChirpKeying(VMCK)forreference，thepaperproposesanewdigitalmodu

4、lationtechnologynamedas1／2ContinousFrequencyChirpKeying(1／2一CFCK)Thecharacteristicoftime—frequencydomainandBitErrate(BER)isanalyzedbysoftwareandhardwareplatformsI／2一ContinousPhaseChirpKeying(1／2CPCK)，whichistheoptimizedm

5、odulationwaveformsof1／2CFCK，CanfurtherimproveenergyconcentrationofthemodulatedsignalsThedetailresearchesareasfollowsTobeginwith，VMCKmodulationmethodisanalyzedAimingatthedrawbacksofVMCK，1／2CFCKisproposedThecharacteristics

6、ofmodulatedsignal，includingPowerSpectralDensity(PSD)andthecorrelationofwaveformssamples，andBERperformanceoftheWirelessCommunicationSystem(wcs)areresearchedbytheoreticalderivationandsimulationsInordertovalidatethesignific

7、antcharacteristicsof1／2CFCKandexploreitsimplementationschemesinprojectpractice，1／2CFCKcommunicationslinkhardwareplatformisconstructedbasedonFieldProgrammableGataArray(FPGA)Thefeasibilityandvalidityofthecommunicationsyste

8、mbasedon1／2一CFCKareverifiedfromtheviewpointofhardwaretestsFinally1／2CPCKwhichoptimizes1／2CFCKmodulatedwaveformsbyrealizingthecontinuityofsignalphase，CanfurtherimproveenergyconcentrationofthemodulatedsignalsThemodulatedsi