多径衰落信道的典型特征分析及仿真研究

:2009930(702,230037),,,TypicalCharactersAnalysisandSimulationResearchonMulti2pathFadingChannelsHuKai(702laboratory,ElectronicEngineeringInstitute,Hefei230037,China)Abstract:Thetimeselectionandfrequencyselectionofmulti2pathfadingchannelsareanalyzedinthispaper.Themulti2patheffectandDopplereffectonchannelsarediscussedandcompared.Simu2lationanalysisisdonefromtheangleofthetimedomainandfrequencydomainrespectively.Tothetimeinvariantandtimevariantmulti2pathfadingchannels,simulationresultsshowthevariationrateofsignalisproportionaltotheincreaseofthetimedomainspreadandthefrequencydomainspread.Keywords:multi2path;fadingchannel;typicalcharacter;simulation,,,,,,,,,,,11.1(Doppler),;,201012010,No.1ELECTRONICWARFARE130SeriesNo.130,,,,,,,,,;,,,[1]:,…BBD,s(f),,,s(f)…B,:…B=-fs(f)df-s(f)df(1)BD,:BD=-(f-…B)2s(f)df-s(f)df(2),BDfds(f),BsBD,BsBD[1]:,,,,,,,,,,,015,:(0,Tc,0)=0.5(3)Tc916fm(4)1.2,,,,,,,,,,(),,,,,,,[1]::,rms(),0,,,,,P()=1TeT0(5)T,,130:43,T,[02T]ISI,,:Rb1/(6)[1]:BC,BC,(),BC,(),,,,BC015,:BC12t(7)tBCBs,,;,,(ISI),,BCBs,,,;,,(ISI),,24,,;,2.1,,,,,:BsBC(8)Ts(9),Ts(Bs);t;BC,,,,,,,,,,,:BsBC(10)Ts(11)2.2,BsBD,,,,:TsTC(12)BsBD(13),BsBD,,:TsTC(14)BsBD(15),(),,44201013,,;,3.1[2](),,,:H()=Ln=1ane-jn(16),i=1,2,,L,n,81,,1,,,:H(d)=bLOSrLOSej2rLOS/+brefrrefRej2rref/(17)R,bLOSbref,bLOS=1,bref=-1R=-1,(17):H(d)=1rLOSej2rLOS/-1rrefRej2rref/(18)2,,:,6,[012345][0011012013014015]2345,,45130:45:6,7;8,9;10,11678-11,,3.2[2],,,:f=f3(v3cosc)(19)f,,f=f3(vs3coss+vo3cosoc)(20)f,vs,vo,s,o:sf(t)=12-S(+2f)ejtd(21)891011,,,4620101,:y(t)=H()ejt(22)H()=Nn=1ane-jn(23)N,an,nn,nn=2fn,|fn|FfD,:y(t)=H(,t)ejt(24)H(,t)=Nn=1ane-jn+jnt(25),,12,13,,,121314,150.20.5,14154,,,,1BELLO.P.A.Characterizationofrandomlytimevariantlin2earchannels[J].IEEETrans.CommunicationsSystems,1963,11(4):360-393.2CLARKE,R.H.Astatisticaltheoryofmobileradioreception[J].BellSystemsTechnicalJoumal,1968,47(6):957-1000.(1983),,,,130:47