EXACT ANALYSIS OF SPURIOUS SIGNALS IN DIRECT DIGITAL FREQUENCY SYNTHESIZERS DUE TO AMPLITUDE QUANTIZATION-中国Betway体育网页登陆

摘要 AmplitudequantizationisoneofthemainsourcesofspuriousnoisefrequenciesinDirectDigitalFrequencySynthesizers(DDFSs),whichaffecttheirapplicationtomanywirelesstelecommu-nicationsystems.Inthispaper,twodifferentkindsofspurioussignalsduetoamplitudequantizationinDDFSsareexactlyformulatedinthetimedomainanddetailedlycomparedinthefrequencydo-main,andtheeffectsoftheDDFSparametervariationsonthespuriousperformancearethoroughlystudied.Thenthespectralpropertiesandpowerlevelsoftheamplitude-quantizationspursintheabsenceofphase-accumulatortruncationareemphaticallyanalyzedbywaveformestimationandcomputersimulation,andseveralimportantconclusionsarederivedwhichcanprovidetheoreticalsupportforparameterchoiceandspuriousperformanceevaluationintheapplicationofDDFSs.

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EXACT ANALYSIS OF SPURIOUS SIGNALS IN DIRECT DIGITAL FREQUENCY SYNTHESIZERS DUE TO AMPLITUDE QUANTIZATION

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