资源描述：
《Lecture1_Introduction-lecture-2014S-rev3》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、EE609ACommunicationTheoryILecture1IntroductionJan.27,2014GeneralInformationLecture:Monday,3:00-5:30P.M.atBurchard430Instructor:JackWintersE-mail:jack.winters@stevens.eduOffice:Burchard217AllmaterialonMoodle1GeneralInformation•Textbook:–B.Sklar,DigitalCommunications:F
2、undamentalsandApplications(2ndEdition),PrenticeHall,2001,ISBN:0130847887.–Referencebook:J.G.Proakis,DigitalCommunications(5thEdition),McGrawHill,2001,ISBN:9780072957167.•Prerequisites:–ProbabilityandStatisticalAnalysis–SignalandSystems–DigitalSignalProcessing–LinearA
3、lgebra–Matlab2GeneralInformation•Assignments(15%)–Therewillbehomeworkforeverylecture(10total).–Matlabsimulation•Quizzes(10%)–Two20minutein-classquizzes(openbook).•Project(25%)–Onefinalproject:theoreticalderivationandcommunicationsimulationsusingMatlab.•Exams(50%)–Mid
4、term(openbook,25%):Mar.17,2014–Final(openbook,25%):May5,20143GeneralInformation•Grading4GeneralInformation•Calendar5CommunicationSystems•Provideforelectronicexchangeofmultimediadata–Voice,data,video,music,email,webpages,etc.•CommunicationSystemsToday–Wired:Landlineph
5、one–Optical:Freespaceoptical,opticalfibers–Wireless:Cellular,WLAN,satellite,Bluetooth,Zigbee,RFID,RadioandTVbroadcasting6WhyDigital?•Twobasicmechanismsaffectsignals–Non-idealfrequencytransferfunction–Unwantednoiseorotherinterference•AnalogCommunications–Continuouswav
6、eformwithcontinuousrangeofamplitudes•Oneoutofinfinitealternatives•Distortionintransmission•Waveformfidelity•Signalregeneration–Performancemeasure•SNR,signal-to-noiseratio•Telephonequalityvoice,SNR30dB•Highfidelitymusic,SNR50-60dB7WhyDigital?•DigitalCommunications–One
7、outoffinitealternatives–Performancemeasure•P-probabilityoferrore•Biterrorrate(BER)=errorbits/totalbitstransmitted•Digitizedspeech:P=10-5e•Computerdata:P=10-9e8WhyDigital?•AdvantagesofDigitalCommunications–Easeofmultiplexing(TDM),multipleaccess,encryption–Useofmodernt
8、echnology,spreadspectrum,OFDM,etc.–Reliable:signalregeneration–Lowcost:digitalcircuitsvs.analogcircuits–Digitalsignalprocessing:mit
