基于FPGA的16QAM調(diào)制解調(diào)系統(tǒng)的研究.pdf

1、大連海事大學碩士學位論文基于FPGA的16QAM調(diào)制解調(diào)系統(tǒng)的研究姓名：楊明華申請學位級別：碩士專業(yè)：信息與通信工程（通信與信息系統(tǒng)）指導教師：王靜20100601英文摘要ABSTRACTAsthetwotraditionalmethodsofdigitalmodulation，frequencymodulationandphasemodulation，havesomedefects，suchaslowspectrumutilizati

2、onrate，poorresistancetomulti—pathfadingslowpowerspectrumdecaying，seriousoutofbandradiationQuadratureamplitudemodulationisajointcontrolleddi酉talmodulationtechnologyofphaseandamplitude，whichnotonlyhashigherspectrumefficien

3、cybutalsohashigherspeedofdatatransmissioninlimitedfrequencybandQAMmodulationtechnologyplaysanimportantroleinmodemcommunicationSothatthereisimportanttheoreticalandpracticalsignificanceindeeplyresearchinginQAMFPGAhasbecome

4、oneofthepreferredwayinwirelesscommunicationhardwaredesign，becauseofitspowerful，shortdevelopmentcyclerepeatabilityofmodification，intelligentdevelopmenttoolsandsoftwareupgradeeasilyfeaturesTIlisthesiscombinesthesoftwireles

5、sradiothoughtandbuildsthe16QAMsystemsbasedonFPGAofwhichthebandwidthis1350Hz，thecarrierfrequencyis1MHz，andthecodespeedis4000BaudThemodulatorhasachievedtheintendeddesignrequirementsthroughdebuggingandtestingSomeofthekeymod

6、ules’algorithmofthedemodulationsuchasearliersynchronization，symbolsynchronizationhasbeensimulatedandanalyzedAlso，thesemoduleshavebeencompiledbyveriloglanguageinISE92developmentenvironmentTheModelsimsimulationverifiesthat

7、therelevantmodules’designcorrectlythefunctionofcarriersynchronizationandsymbolsynchronizationcanbeachievedLoopfilterasthekeypartofsymbolsynchronizationandcarrierrecoverymodules，hasacrucialinfluenceonperformanceofdemodula

8、tionsystems，inthisthesis，therehasdetailintroductionaboutdigitalloopfilterConsideringperformancerequirementextentofdifficultyandhardwareresourceconsumptionofsystemitselfdesign，thispaperselectsappropriatemeasuretoimplement