3g移动通信系统共存干扰分析与滤波电路设计

(),2006,28(S1):9498CN53-1045/NISSN0258-7971JournalofYunnanUniversityX3G,,(,650091):3G,TD-SCDMA.WCDMATD-SCDMA,.,,.:3G;WCDMA;TD-SCDMA;:TN931:A:0258-7971(2006)S1-0094-05,,.3,,.13G3G3rdGeneration,3[1,2],.12,3.,2Mbps,384kbps144kbps.(ITU)200053G2000(IMT-2000),33:IMT-2000CDMA-DS(IMT-2000CDMA),WCDMA,5MHz;IMT-2000CDMA-MC(IMT-2000CDMA),CD2MA2000,11125MHz;TD-SCDMA,CDMATDD.4:.CDMA2000WCDMA,TD-SCDMA1(,3).23GTD-SCDMATD-SCDMA(TimeDivision-SynchronousCodeDivisionMultipleAccess)[2,3],CWTS3GPP,1,CDMATDMAFDMA,CDMA.TD-SCDMA1,,TDD3G.TD-SCDMA:X:2006-04-28:(1979-),,,,,UWB,3G;:(1957-),,,,,,.(1).TD-SCDMA116MHz.5MHz3,,,(DCA).(2).TD-SCDMA.,,TD-SCDMA.(3).,TD-SCD2MA,:DSP;,,CDMA,,CDMA,,;DSP,,,,.(4).TD-SCDMAIubAGbIuIuR,TD-SCDMA2G215GGSM,3G,.33GTDDFDD2,(FDD):19201980MHz21102170MHz;(TDD):18801920MHz20102025MHz.WCD2MACDMA2000FDD2,,TDDTD-SCDMAFDD,,TD-SCDMATDD3G.TDDTD-SCDMA,TD-SCDMA.3G,.3G335MHz,2G140MHz.3G214,,.TD-SCDMA155MHz(1880-1920MHz2010-2025MHz23002400MHz),TD-SCDMA.3G,1920MHz,TD-SCDMAWCDMA,TD-SCDMAWCDMA.:WCDMATD-SCDMA;WCDMATD-SCDMA;TD-SCDMAWCDMA;TD-SCDMAWCDMA.,4:WCDMAULTD-SCDMAUL;WCDMAULTD-SCDMADL;TD-SCDMAULWCDMAUL;TD-SCDMADLWCDMAUL.WCDMATD-SCDMA,TD-SCDMAWCDMA,,.,,,.,3G,.43G(1).,.[4,5],(EW)...,.,,,.,,.59S1:3G1Fig11Rectangularwaveguide,3GTD-SCDMAWCD2MA.TD-SCDMA,,TD-SCDMA18801920MHz,.,WR-430,5,011,3dB40MHz,-,1930MHz35dB.1Tab11DesignspecificationofwaveguideBPFWR-4301900MHz3-dB40MHz5011dB3dBMIT.:(,,);;;;;;;;;.,An2soft,2,53.WR-43045,18801920MHz,,7dB,1930MHz38dB.TD-SCDMA,,TD-SCDMA;,(WCDMA),.2Fig12WaveguideBPFcircuit69()2835Fig13(N=S)Waveguidebondpassfilter43GFig14Frequencycharacteristicsof3GwaveguideBPFTD-SCDMA,WCDMA,[6]19201980MHzWCDMA.3G,,1960MHz,1930MHz1990MHz35dB.,LC3G.,,LCLC,,6.53GFig15Impedancecharacteristicsof3GwaveguideBPF63GFig163Gbandstopfiltercircuit,500MHz,.,,LC./,..,79S1:3G3G78.73GFig17Frequencycharacteristicsof3Gbandstopfilter83GFig18Impedancecharacteristicsof3Gbandstopfilter73G,1960MHz,117dB,1930,1990MHz36dB,.,7,1920MHz,.WCDMATD-SCDMA,TD-SCDMA.553G.1,TD-SCDMA.,,,,.TD-SCDMA3G,,WCDMATD-SCDMA.,3G.:[1]KEITHR,EDWARDS.[J].,1999,12:48250.[2].TD-SCDMA[M].:,2004.[3].TD-SCDMA[M].:,2003.[4].[J].,2001,1:34237.[5],.5[J].,2001,122:30233.[6].[M].:,2005.Analysisof3GcommunicationsystemscoexistenceinterferenceandDesignoffiltercircuitTANGMeng,ZHAODong2feng,YUJiang(DepartmentofCommunicationEngineering,YunnanUniversity,Kunming650091,China)Abstract:Thedevelopmentof3Gsystemisdiscussed.ItisanalyzedtothecharacteristicsofTD-SCD2MAtechnicalstandard.WhenWCDMAandTD-SCDMAmixnetwork,theinterferenceisveryserious.Accordingtoanalysisandresearchthequestion,amethodisproposedtoresolveit,andtwokindsoffilteraredesignedtoreducetheinterferencebetween3Gcommunicationsystems.Keywords:3G;WCDMA;TD-SCDMA;Wave-guidefilter89()28