Design of Groupband Data Modem Using OQAM Technique-中国期刊网

摘要 AnorthogonallymultiplexedQAM(OQAM)systemallowstransmissionspeedtobeveryclosetotheNyquistratewithlittlesensitivitytodelayandsignaldistortionsoftransmissionmediumwhenalargenumberofchannelsareused.Itscircuitcomplexitycanbelargelyovercomebyintroducingdigitalsignalprocessing(DSP)technology,Inthispaper,theimplementationofgroupbanddatamodemusingOQAMtechniqueispresented,whereOQAMsystemisrealizedbymeansofcascadingadiscretecosinetransformer(DCT)andaweightingnetwork.TheproperalgorithmofevaluatingFIRfilterandDCTprovidesfurtherreductionofthecomputationcomplexitywhichdropsto35.6%ofthatofHirosaki'sscheme[5].

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Design of Groupband Data Modem Using OQAM Technique

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Design of Groupband Data Modem Using OQAM Technique

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