Digital-Communication-题库-PPT课件.ppt
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DigitalCommunications,HanYuBingTel:
84303169Office:
TheEOEbuilding,RoomA311,ConsiderthethreewaveformspassingthroughanAWGNchannelwithpowerspectrumdensityofN0/2.
(1)Findthebasisorthonormalfunctionsforthesesignals;
(2)Usethebasisfunctionstorepresentthethreesignalsbyvectors,andplotthesignalspacediagramsforthesesignals;(3)Determinethreelikelihoodfunctions,andshowwhichprobabilityoferrorislargest.,7,8,10,SignalsofNon-linearModulationwithMemory,Whenmiseven,thefullresponseCPMsignalsphasestatesWhenmisodd,thefullresponseCPMsignalsphasestatesIngeneralcase,whentheCPMsignalsareM-arymodulationandpartialresponsewithdurationLT,Lispartialresponsewaveformmemorylength;Misthenumberofsymbols,3.AssumedthereareMsignalssm(t),m=1,Mtobetransmittedwithequalenergyandprobability.ThedimensionalityofthesessignalsareN,andthechannelisAWGNchannelwithmeanzeroandvarianceN0/2.Thereceivedsignalisr(t).
(1)PleaseplotthestructureoftheoptimumreceiverundertheMAPcriterionandbrieflyexplainit.,11,12,19,LowpassbandwidthW/2=1350Hz,f1,K=1,L=1,Eq.(9.4-439.4-47),FinalExam,Writtenandopen-bookexamTime:
TobedeterminedPlace:
Tobedetermined,27,28,Thanksforyourattention!