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200622112110396

于 2006-06-02 发布文件大小:157KB

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Abstract：Thearticleismainlydevotedtothetheoryaswellastheachievementonthemodulationanddemodulationofπ/ 4-DQPSKsysteminthesoftwareSystemView.Besides，thearticleanalysesthedynamicandstatic behaviorsoftheπ/4-DQPSKsystemaswellastheperformanceagainstnoiseundertheconditionofGaussnoise channel.Thecomparisonismadeonthespectrumandanti-noiseperformancebetweenπ/4-DQPSKandQPSK underthethesamechannel.Theresultofsimulationshowsthatthespectrumexpandingofπ/4-DQPSKissuperiortothatoftheQPSKsystem. Keywords：π/4-DQPSK；SystemView；computeraideddesign（CAD）；Matlab(Abstract: Thearticleismainlydevotedtothetheoryaswellastheachievementonthemodulationanddemodulationof pi/4-DQPSKsysteminthesoftwareSystemView.Besides, thearticleanalysesthedynamicandstatic behaviorsofthe pi /4-DQPSKsystemaswellastheperformanceagainstnoiseundertheconditionofGaussnoise channel.Thecomparisonismadeonthespectrumandanti-noiseperformancebetween pi /4-DQPSKandQPSK underthethesamechannel.Theresultofsimulationshowsthatthespectrumexpandingof pi /4-DQPSKissuperiortothatoftheQPSKsystem. Keywords: Pi /4-DQPSK; SystemView; Computeraideddesign (CAD); Matlab)

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