问题标题：
英语翻译InthemodelofadigitalcommunicationsystemdescribedinSection1.1,werecallthatthetransmitterbuildingblocksconsistofthediscrete-input,discrete-outputchannelencoderfollowedbythemodulator.Thefunctionofthediscrete
问题描述：
英语翻译
InthemodelofadigitalcommunicationsystemdescribedinSection1.1,werecallthatthetransmitterbuildingblocksconsistofthediscrete-input,discrete-outputchannelencoderfollowedbythemodulator.Thefunctionofthediscretechannelencordistointroduce,inacontrolledmanner,someredundancyinthebinaryinformationsequence,whichcanbeusedatthereceivertoovercometheeffectsofnoiseandinterferenceencounteredinthetransmissionofthesignalthroughthechannel.Theencodingprocessgenerallyinvolvestakingkinformationbitsatatimeandmappingeachk-bitsequenceintoauniquen-bitsequence,calledacodeword.Theamountofredundancyintroducedbytheencodingofthedateinthismannerismeasuredbytheration/k.Thereciprocaloftheratio,namelyk/n,iscalledthecoderate.
刘苗回答：
在1.1章里所描述的数字通信例子中,我们复习了由发射器模版构成的离散式输入输出通道,它与调幅器相连.离散信号通道的功能,在关于控制方式上,是引进二进制的冗余,在接收器中它是用来克服噪声影响以及信号在传送时遇到...
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