/2011/06———————————————————:2011-04-150(MIMO)。,MIMO,20~40bit/s/Hz;1~5bit/s/Hz,10~12bit/s/Hz。,,。,MIMO,。MIMO,。1MIMO3,MIMO、3。1.12,(STBC)(STTC)。,、,,。1.1.1STBCSTBC,,,(,510663)SuHuahong(CombaTelecomSystems(Guangzhou)Ltd.,Guangzhou510663,China)MIMO3:MIMO:TN929.5:A:1007-3043201106-0001-05:MIMO3、3MIMO-75~-65dBm。Abstract:ItbrieflydescribesthetechnologiesadoptedbyMIMOtheyarespacetimecodingspatialmultiplexingandsmartantenna.Itan-alyzesthedifferentapplicationscenarioofthememphasizesthatsmartantennacan'tbeadoptedindenseurbanarea.ItalsopointsoutthatthefieldstrengthofsignalinMIMOcoverageareaisbetween-75and-65dBmtheuniformsignalcanrealizethehighordermodulationofdata.Keywords:MIMOSpatialcodingSpatialmultiplexingSmartantennaUniformfieldstrengthHighordermodulationThreeTechnologiesAdoptedbyMIMOandTheApplicationScenarioAnalysisMIMO3RadioCommunication12011/06/DTPTS/P21STBCMIMOci(k)ci(k)c1(k)INMIc1(k)s赞(k)……s(k)。MIMO1,s(k)Nci(k),i=1,...,N。NN,M。,。N,,。,。STBC1998,Alamouti,,3GPP。STBC2,2,2,。,STBC。(PAM),1。,,MQAM(16QAM)MPSK(8PSK),2,1。3、44,,3/41/2。,,,。,;,、。,STBC2。1.1.2STTCSTTC,。,、、,,。,,Viterbi。,。,2。,/,2。;,。2,,,。,Viterbi。。STTC。,,,、,,、、。,STTC,。1.2,,,,。。,。,,,MIMO3RadioCommunication2/2011/063b3b1…b4b2…b3b1b4b2…b3b1…b4b2…蕊蕊b3b1…b4b2…b3b1…b4b2…(3)。,。(ZF)、MMSE、(MLD)(BLAST)。,MMSE,,,;MLD,,,,;BLAST。BLAST,MIMO。BLASTD-BLASTV-BLAST。D-BLASTG.J.Foschini1996。D-BLAST,,,。D-BLAST,,,。1998G.D.GoldenG.J.FoschiniV-BLAST,,,,,,,。200210,BLAST,MIMO。1.3,,,,。(TDD),(),;,。23MIMO,,,(16QAM)。、,,。、,,,。,,。。,MIMO,。,,、;,,、。3GPPFDD。,,TDD。[4],、,,,;,DOA。33G(WCDMA),。4。MIMO3RadioCommunication32011/06/DTPT5BS213/(Mbit/s)/dBm6-829-8112-7918-77/(Mbit/s)/dBm24-7436-7048-6654-65/(Mbit/s)/dBm654Wi-Fi-73-65-92-843A8SuperWi-Fi,MCL(),,。+/%20.020.020.0Eb/N0/dB5.03.53.51/(Mbit/s)1.01.32.44/(Mbit/s)4.05.29.54、3/(Mbit/s)12.015.728.61,2。3G,,、、、、10,(200m0.6)(,21~28m),,。43G/4G,MIMO,,,。4.15WLAN(OFDM)2。4.2A8SuperWi-FiA8SuperWi-Fi3。90%,8dB,3。4.323-82dBm,6Mbit/s,-65dBm,54Mbit/s,9,LTE-75dBm,2G-85dBm。5MIMO2:2G/3G。5.15,MIMO330m。6。5.27[3]。71+61。、。(8m);15~30dBm;150m。,。BTS12DAU12DRU41((75%))2WLAN(OFDM)MIMO3RadioCommunication4/2011/06-45.0/dBm05001000/m-84.46:。R0BACR6R5R4R3R2R168:,[3][5],3,,MIMO。3G,,,(-75~-85dBm),(),95%-75dBm,2G。6MIMO,,0.5。,10。TD-SCDMA,,(8)(4×2)。,,TD-SCDMA8,4+45°4-45°。,(4×4MIMO)。2W8,10W4,,4,6dB。324(3×8),27(3×9)12(3×4),81(3×3×9)12(3×4)。、,,,6(4),。:[1],.OFDM[M].:,2007.[2],,,.[M].2.:,2007.[3]HonglinHu.———[M].,,,.:,2009.[4].MIMO3G[J].,2010(5).[5],,,.WLAN[J].,2010(7).[6],,,.TD-SCDMA[M].:,2007.87-55.0/dBm0200100/m-75.0MIMO3RadioCommunication5