超宽带无线通信技术的新进展

20051271SystemsEngineeringandElectronicsJan.2005Vol127No11:2004-01-13;:2004-08-31:(60372097);(4052021);IT(ZNAAUWB-ITRC):(1971-),,,,:10012506X(2005)0120020205,(,100876):(UWB)UWB,UWB,:IEEE802.15.3aUWB,UWB(MIMO),UWB(OFDM)(LR-WPANs)802.15.4a,:UWB:;;;;:TN915.1:AUpdatedprogressinultra2widebandradiocommunicationstechnologyLIYu2hong,ZHOUZheng(WirelessNetworkLab,BeijingUniversityofPostsandTelecommunications,Beijing100876,China)Abstract:Somegeneralsystemcharacteristics,modulationtechniquesaswellasmultipleaccesstechniquesofUltra2Wideband(UWB)areintroducedbriefly.FocusingonthekeyadvancesofUWB,UWBchannelmodelproposedbytheIEEE802.15.SG3a,UWBmultiple2inputmultiple2output(MIMO)systems,UWBorthogonalfrequencydivi2sionmultiplexing(OFDM)systemsandtheIEEE802.15.4astandardforlowratewirelesspersonalareanetworks(LR2WPANs)arediscussed.Finally,severalvaluableresearchdirectionsareputforward,suchasseekinganewwirelesscommunicationstheoryadaptedtoanalyzenonsinusoidalUWBimpulseradio,etc.Keywords:wirelesscommunications;UWB;summary;UWB2MIMO;UWB2OFDM;LR2WPANs1(WANs)(WLANs)(WPANs)(WBANs)(ad2hoc)[1],,,(UWB),(FCC),3.1GHz10.6GHz2002214[2]UWB,UWB,UWB,,UWB,20045UWBUWBST&IWUWBS2004,UWB22.1FCC,-10dB20%-10dB500MHz=2fh-flfh+fl:fh,flUWB(-10dB500MHz)()[3]11UWB2.2,(1),,,,,,,GHz,,,,,[3]FCC3.1GHz10.6GHz,7.5GHz(2),,UWB,,,,,,,(3),UWBGHz,,ns,ns,,UWBUWB,UWB,3,[4],,,,,UWB,UWB,,,UWBMWalsh[5](PPM)[6](PAM)[7](OOK)[8](BPSK)[9,10],BPSK(TH)(DS)PPMPAMOOKBPSK,4224,OOKPPM;PAM;,,PAMPPM[11];BPSK,3,UWBTH2PPMTH/DS2BP2SK,[12](1),TH2PPMTH/DS2BPSKTH2BPSKDS2BPSK,,DS2BPSKTH2BPSK,TH2BPSK;,DS2BP2SK(2)(MMSE),TH/DS2BPSKTH2PPM,TH2PPMTH/DS2BPSK,TH/DS2BPSKTH2PPMTH/DS2BPSK,,:(PCTH)[13],UWBad2hoc,HorieW12271SanadaY(DS2CDMA)[14],,,,,,MAC(CSMA,CSMAMAC)[1517],,,HorieWSanadaYCSMA[18],,20045UWB,NICTNECBPSKUWB[19],100Mbps,,4UWB,[2023],,UWBUWB,UWBUWB,Cas2sioliD(STDL)IntelIEEE802.15.3aS2VIEEE802.15.SG3a20037UWB(IEEE802.15.SG3a,2003)SalehValenzuelaS2V,,[11](1);(2)IEEEh(t)=XNn=1K(n)k=1nk(t-Tn-nk):X,N,K(n)n;nknk,Tnn,nknknknk=Pnknk:Pnk,nknk,nk=10xnk20,xnk,Tnnk[24]p(Tn/Tn-1)=exp[-(Tn-Tn-1)],n0p(nk/(n-1)k)=exp[-(nk-(n-1)k)],k0:,UWB,IEEE802.15.3aIEEE802.15.3aUWB,(1)IEEE802.15.3aUWB,RAKEUWB[25],RAKE,,;(2)IEEE802.15.3aUWB,UWB(UMTS)802.11a[26],UWB[27]UWB[28];(3)IEEE802.15.3aUWB,PAM,UWB[29]2004519UWBST&IWUWBS2004UWB,NECRADIOSCAPE2UWB(RS22000)[30]:UWB,LANNECRSLANUWB,UWBIEEE802.11a5,(MIMO),MIMO,,,,MIMO,MIMO(),MIMO,,,[31]MIMOUWB[32],,UWB,UWB,UWBMIMO,[32,33]2220056,,IntelTIXtremeSpectrumMotorola,,FCCUWB3.1GHz10.6GHz,7.5GHz,7.5GHzFCC7.5GHz15,OFDM,(UWB2OFDM),,315[3]33200Mb/s,5ns,15,20037IEEE802.15.3a,75%,,,20045UWB,CMOS3GHz7GHz[34],OFDM,UWB7UWBWPAN802.15.4aStudyGroup(SG4a),UWB802.15.4WPAN,802.15.4a4[33]()[35]UWB,1mW,14UWBSG4a/802.15.4a,WPAN,IEEE802.15.4a,IEEE802.15PANTG4a,20068UWB,FCC,UWBUWBUWB,UWB,,UWBUWB,UWB(ITU2RSG1)2002,ITU2RTG1/8,UWB,ITU2RSG1UWB,,,,,,UWB,863,2004,UWB,,86332271[36]UWB,UWB,UWB,,,,,UWB(1)UWB(2),UWB(3)UWBUWBUWB(4)(5)(6)MIMO(7)ad2hoc;UWBIP;UWBad2hoc,ad2hoc,9,,UWB,UWB,500MHzUWB,,UWBUWB,,,FCCUWBUWB,,,:[1]PorcinoD,HirtW.Ultra2widebandradiotechnology:potentialandchal2lengesahead[J].IEEECommunicationsMagazine,2003,41(7):66-74.[2]Firstreportandorder,revisionofpart15ofthecommissionsrulesre2gardingultra2widebandtransmissionsystems[S].FCC,Washington,DC,ETDocket98-153,2002.[3]AielloGR,RogersonGD.Ultra2widebandwirelesssystems[J].Mi2crowaveMagazine,IEEE,2003,4(2):36-47.[4]WelbornML.Systemconsiderationsforultra2widebandwirelessnetworks[C].RadioandWirelessConference,RAWCON2001.IEEE,2001.5-8.[5]EshimaK,HaseY,OomoriS.M2aryUWBsystemusingWalshcodes[C].UltraWidebandSystemsandTechnologies,DigestofPapers.2002IEEEConferenceon,2002.37-40.[6]ScholtzRA,WinMZ.Ultra2widebandwidthtime2hoppingspread2spec2trumimpulseradioforwirelessmultiple2accesscommunications[C].Communications,IEEETransactionson,2000,48(4):679-689.[7]HoM,TaylorL,AielloGR.UWBarchitectureforwirelessvideonet2working[C].Proc.IEEEInt.Conf.ConsumerElectronics,2001.18-19.[8]FontanaR,AmetiA,RichleyE.Recentadvancesinultrawidebandcommunicationssystems[C].IEEEConf.UWBSystemsandTechnolo2giesDig,2002.129-133.[9]WelbornM,MillerT,LynchJ.Multi2userperspectivesinUWBcommu2nicationsnetworks[C].IEEEConf.UWBSystemsandTechnologiesDig,2002.271-275.[10]FlemingR,KushnerC,RobertsG.Rapidacquisitionforultrawide2bandlocalizers[C].IEEEConf.UWBSystemsandTechnologiesDig,2002.245-249.[11]Maria2GabriellaDiBenedetto,GuerinoGiancola.UnderstandingUltraWideBandRadioFundamentals[M].NewJersey:PrenticeHallProfes2sionalTechnicalReference,2004.384-391,277-280.[12],.-(UWB)[J].,2003.33(5):16-19.[13]MaggioGM,RulkovN,ReggianiL.Pseudo2chaotictimehoppingforUWBimpulseradio[J].CircuitsandSystemsI:FundamentalTheoryandApplica2tions,IEEETransactionson[seealsoCircuitsandSystemsI:RegularPa2pers,IEEETransactionson],2001.48(12):1424-1435.[14]HorieW,SanadaY.Novelpacketroutingschemebasedonlocationin2formationforUWBad2hocnetwork[C].UltraWidebandSystemsandTechnologies,IEEEConferenceon,2003.185-189.[15]QiangG,LiuZ,IshiharaS.CDMA2basedcarriersensemultipleaccessprotocolforwirelessLAN[C].IEEEConf.onVTC2000,2001.1164-1