无线通信工程--第04讲－基带传输

1、无线通信工程无线通信工程姚彦教授姚彦教授清华大学微波与数字通信国家重点实验室清华大学微波与数字通信国家重点实验室20012001年年1111月月1717日日 kIMiSi,.,2 , 1, kktu)(Mitgi,.,2 , 1),(2/2/1),()(SSSTTTdttRRdeRfSfjuu2)()( nMiSiinnTtgatu1)()(dtttRTRSSTTuSu),(1)(2/2/lMiMkTjlkiikSusefGfGlRTfS11*)()()(1)(MiMKlTjllikkiiSMiiiSuSepfGfGpTfGpTfS111)(*21)()(Re2)(1)( MiMkkikiSM

2、iiiiSNsMisiiSufGfGppTfGppTNffNfGpTfS11*12212)()(Re2)()1 (1)()(1)(MiiiMiSiitgpNfGp110)(,0)(或TtTttutuT, 0),()(dtetufUftjTT2)()（dfTfUtuTdttuTPTTTTTu2)()(21)(21222TfUfSTuT2/)()(2TfUEfSETuT2/)()(2)()(limfSfSEuuTTkSkskkTtgIkTtgItu)()1 ()()(01NsssSNffNfGpNfGpTfS)()()(1)(20011220111)()()1 (1)(fGfGppTfSS2)(1

3、)(fGTfSSu22sin)(SSSufTfTTAfSNSSSSuNffNfGTfGTfS)()(41)(41)(2222/, 02/,)(020SSftjSffffeThfH)()(sin)(000ttfttfhthSS222041cossin)(tftftftfhthSSSS1, 0, 01 , 0,)2(10iihTiTthSSNSSijiNiffTfTheiffH，22cos2)2() 1(10NSSiNiffTfThiffH，22cos2)2() 1(1NNSSffffTfThfH, 0,22cos2)(022041cos4)(tftfhthSSSSfTfTfNfNsin)()(1

4、3SSfTfTsinHT (f)HR (f)+u(t)v(t)n0 (t)()()()()(tntxtvkTtItukskdfefHfHthkTthItxftjRTksk2)()()()()(并有：000000)()()(nxtntxtvvdfefHfHIhIxdffHNftjRTRn020000202)()()(而：dffHNdfefHfHxRftjRTn2022220)()()(0bababadxxgdxxfdxxgxf222)()()()(dffHdffHdfefHfHRTftjRT2222)()()()(002*0)()(tfjTRefHCfH0022*2002*0max)()()()(NENdffHdffHCNdffHCfHsTTTT)()(*fHfHTR)()()(1fNfHfHRT0220000020000121212/21221) 1/() 1/(NEerfce