■E_______㈣智能天线的原理和实现ThePrincipleofSmartAntennaTechnologyandItsImplementation季磷LfShi-he：唐电信北京1C313~3industri~lGroup，Beijing100083，China)摘要：近年来，智能天线挂木已经成为移动通信中最具有吸引力的挂术之一。在无线基站使用一个天线阵和基于基带数字信号处理挂术，对基站的接受和发射波束进行白适应的赋形，1Introductiondevelopinthe1960sTheobject可以大大降低秉统内的干扰，提高系统容量，Thecoretechnologyof3Gisoftheresearchonthistechnol—降低发射功率并提高接收是敏度。在大大提高radiotransmissiontechnologyOgYistheradarantennaarray系统性能的同时，还可以降低设备的成本此智能天线首先使用在I"D-SCDMA东统中，也能使fRTT】．ItmaywellbesaidthatwithaviewtoenhanceiogtheIMT·2000basjcallyencom．用在0#t,lAFDD东统中本文对移动通信中的智performanceofradarandthe能天线技术的原理和在TD--SCDMA系统中的实现passesalthetechnicaladvancescaPabiIityofeIectronic作T简要介绍inteIecommunicationsjncountermeasureHowever，itisAbstract：Inrecent∞r8the1990s．Thecompetitioninnotuntiltheearly1990sthatjt，smartantennatechno1．ogyhasbecomeoneofthemostattractivetech．standardsisalsoacompetitiontookofonthebasisofmicro．nologiesinmobilecommunicationsintechnologyOnMay5，2000．Radiobase．Computertechnologyanddigitalstationscanreducemateriallyjmedeii~nceinthetheITUfinallyrecognizedlMT_signalprocessingtechnologyInsystem，expandthesystemcepaclty2000RTT,ofwhichCDMAisa．1owerthethemid-1990s，peopleintheb'ansmltpowerandimproves~nsibilitybyshapingmainstreamtechnologylAtan—UnitedStatesandChinaconsid．their~ceJveandtransmitbeamsw“henantennaotherITUmeetingofMarch2000，eredusingsmanantennatech-arrayandbasebanddigitalsignalprocessingmuchattentionwaspaidtothenologyinradio-communicationst~chnology．Thisn~suItsingreatlyenhancedsys-useofsmartantennatechnologysystemsln1997．theXinweiternperformanceandloweredequipmentcostinCDMAsystemsandtheAu．．TelecomTechnologiesCompany,SmartantennasallBfirstLinedinTD-SCDMA．sys-gustITUmeetingwentfurthertoBeijingundertheChinaAcademyternsandcanalsobeusedInCDMAFDDeystern~．discusstheuseofthesmartan．ofTelecomTechnology(CI丌】Thisarticlegivesabnd∞a。10dOnoftheprlncipletennainCDMAsystemsThisissuccessfuIlydeveIopedanofsmartantennatechnologyandytsimplementa．aclearsign