学科分类
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1 个结果
  • 简介:Anewlow-costdemodulatorforZigBeereceiverssatisfyingrequirementsofIEEE802.15.4standardispresented,whichisdesignedforISM2.4GHzbandandbasedonZero-IFreceivers.ThisdemodulatorextractssymbolsdirectlyfrombasebandsignalratherthanrecoveringPNcodechips,soitsstructureissimple.Twomaintechniquesareusedtoimprovetheperformanceofdemodulator.OneisPhase-AxisCrossingDetector(PACD)whichdetectsthephasecorrelationofbasebandsignal.Theotherissymbolsynchronizationandsamplingclockcorrectionalgorithm.Theresultshowsthatthisdemodulatorperformance,SymbolErrorRate(SER)andPacketErrorRate(PER)meetIEEE802.15.4TMstandardrequirementsandthedemodulatorcanhandlefrequencyoffsetinexcessof200kHz,involvingaZero-IFreceiverwithaNoiseFigure(NF)lowerthan17dB,whichiseasilyimple-mentedinstandardCMOStechnology.

  • 标签: 零中频接收机 ZIGBEE 中频解调 IEEE802.15.4标准 低成本 CMOS技术