信号与系统1-4

《信号与系统1-4》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Chapter1Signalsandsystems1.5BasicsignalsintimedomainImpulsesignalStepsignal1.5.1DTstepandimpulsesignalUnitimpulse0n0n1n01.5.1DTstepandimpulsesignalDefinition0n0Unitstepun1n0Relationsbetweenstepandimpulsenunun1nunmnkmk

2、0Samplingpropertiesofimpulsefunctionxnnkxknkx2xn1n2x2x2n2xnn2x2n2AnysignalscanberepresentedbythecombinationsofimpulsesignalsAnysignalscanberepresentedbythecombinationsofimpulsesignalsxnxknkk1.5.2CTst

3、epandimpulsesignalDefinition0t0Unitsteput1t0Unitimpulse0t0ttdt10t0Relationsbetweenstepandimpulseduttdttutdtd0Singularityfunctionsututtut'tut101Propertiesofimpulsefunctiontttttt

4、0001atta:real,a0attPropertiesofimpulsefunctiont21t0isincludedtt0dtt10tisnotincluded0xtttxttt000Samplingpropertyofimpulsefunctionxtttxttt000xtxtdAnysignalscanberepresentedbythecombinationsofi

5、mpulsesignals1.5.3Applicationofstepsignalsututut3utut31.5.3Applicationofstepsignalsxtut4ut3xttwosidedfinite-durationxtutxtutleftsidedrightsidedTherectangularwavefunctionsxtut22u(t1)2ut1ut4xtut22u(t1)2ut

6、1ut4Thetriangularwavefunctionsxttutut1ut1ut23tut2ut3xttutut1ut1ut23tut2ut3Thetriangularwavefunctionsxttutt1ut1t2ut2t3ut3xttutt1ut1t2ut2

7、t3ut3TheimpulsetrainttnTTn