数字的基带信号发生器地设计

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1、实用标准文案数字基带信号发生器的设计摘要：设计一个基于FPGA的数字基带信号发生器，首先简要介绍了单极性非归零码、双极性非归零码、单极性归零码、双极性归零码、差分码、交替极性码、分相码、传号反转码、三阶高密度双极性码等基带码的基本特点，然后根据码型转换原理设计发生器模块。由于EDA技术可以简化电路，集成多块芯片，减小电路体积，所以程序采用VHDL进行描述，并用maxplusII软件仿真实现所有功能，最后将功能集成到FPGA上，并设计电路、制作实物，产生的基带码稳定、可靠，可满足不同数字基带系统传输需要。关键词：数字基带码；

2、EDA；VHDL；PCB；FPGADigitalbase-bandsignalgeneratordesignProfession:ElectronicsandinformationscienceandtechnologyAuthor:DengChuxianinstructor:ZhanJieAbstract:FPGA-baseddesignaletter-numbergeneratorwith,firstofallwebrieflyintroduceunipolarNRZcode,bipolarNRZ,Unipolarze

3、royardscode,bipolarzeroyardscode,differentialcode,alternatingpolaritycode,phasecode,code-reversal,andthird-orderhigh-densitybipolarcodesetc.Thenwedesigngeneratormoduleunderthecode-conversiondesignprinciples.AsEDAtechnologycanmakecircuitsimple,integratemultiplechip

4、s,reducethesizeofcircuits,sowetakeadvantageofVHDLtodescribeitandusemaxplusIIsoftwaretosimulate.FinallyweintegrateallthefeturesintotheFPGA,anddesigncircuittogeneratestableandreliablebase-bandcodetomeetthedifferentbase-banddigitaltransmissionsystemneeds.Keywords:dig

5、italbase-bandcode;EDA;VHDL;PCB;FPGA目录精彩文档实用标准文案摘要..................................................................................IAbstract...............................................................................I1数字基带信号.....................................

6、...................................31.1数字基带信号的码型设计原则......................................................31.2非归零码(NRZ码).................................................................31.2.1单极性......................................................................

7、.31.2.2双极性.......................................................................31.3归零码(RZ码).....................................................................31.3.1单极性.......................................................................41.3.2双极性.............

8、..........................................................41.4差分码..........................................................................41.5交替极性码(AMI