大学生电子设计大赛论文-简易数字信号传输性能分析仪

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1、2011年全国大学生电子设计竞赛简易数字信号传输性能分析仪（E题）【本科组】2011年9月3日212011年全国大学生电子设计竞赛简易数字信号传输性能分析仪（E题）【本科组】2011年9月3日21摘要本设计是一个简易数字信号传输性能分析仪。实现数字信号传输性能的测试。经过对题目理解和分析，我们课题组决定采用模块设计。设计分为5个模块：电源电路模块、数字信号发生电路模块、低通滤波器模块、伪随机信号发生电路模块和数字信号分析电路模块。电源模块用于提供5V和12V的稳定电压；数字信号发生电路模块用于产生m序

2、列信号V1；低通滤波器模块用于对信号的滤波；伪随机信号发生电路模块用于产生m序列的伪随机信号V3；数字信号发生电路模块用于发挥部分对信号的分析。本设计思路清晰，易于实现，可对一个简单的数字信号进行分析。关键词：数字信号性能分析模块设计伪随机信号低通滤波21AbstractThisdesignisasimpledigitalsignaltransmissionperformanceanalyzer.Realizedigitalsignaltransmissionperformancetest.After

3、understandingandanalysisofthegroup,wedecidedtoadoptmoduledesign.Thedesignisdividedintofivemodules:powersupplycircuitmodule,digitalsignalcircuitmodule,lowpassfiltermodules,pseudorandomsignalgeneratormoduleanddigitalsignalanalysiscircuitmodule.Thepowermod

4、ulesusedtoprovidea5Vand12Vvoltagestability;DigitalsignalhappencircuitmoduleusedtoproducemseriessignalV1;Lowpassfiltermodulesusedtosignalthefiltering;PseudorandomsignalproducingcircuitmoduleusedtoproducemsequenceofpseudorandomsignalgeneratorV3;Digitalsig

5、nalcircuitmoduleusedtohappentoplayapartofthesignalanalysis.Keywords:DigitalsignalPerformanceanalysisModuledesignPseudorandomsignalLowpassfiltering目录一、系统方案比较与设计··············································21.1系统方案论证与选择···································

6、······21.2系统流程图与电路图·········································3二、单元模块电路··················································62.1电源模块···················································6212.1.1电源模块方案与选择···································62.1.2电源模块电路图··········

7、·····························72.2数字信号发生器模块·········································72.2.1数字信号发生器模块方案与选择·························72.2.2数字信号发生器模块分析设计与计算·····················82.2.3数字信号发生器模块流程图与电路图······················82.3低通滤波器模块···························

8、··················92.3.1低通滤波器模块方案与选择······························92.3.2低通滤波器模块分析设计与计算··························92.3.3低通滤波器模块电路图··································92.4伪随机信号发生模块·········································92.4.1伪随机信号发生