信号与系统试验报告

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1、练习题：1.(1)x=85/360*pi*2;z=2*sin(x)/(1+exp⑵);zz=0.2375»1.(2)%setl(2)a=-3.0:0.1:3.0;z=exp(0.3*a).*sin(a+0.3)/2;zz=Columns1through11-0.0869-0.1080-0.1292-0.1502-0.1709-0.1910-0.2101-0.2280-0.2445-0.2593-0.2721Columns12through22-0.2826-0.2906-0.2959-0.2981-0.2971-0.292

2、8-0.2849-0.2733-0.2579-0.2386-0.2155Colujnns23through33-0.1886-0.1578-0.1234-0.0855-0.04430.00000.04700.09640.14780.20060.2545Columns34through440.30890.36320.41670.46890.51910.56650.61050.65030.68540.71490.7382Colujnns45through550.75460.76360.76460.75710.74060.714

3、80.67940.63410.57900.51390.4390Columns56through610.35460.26100.15860.0482-0.0697-0.19402.A=[1234-4;34787;-3657];B=[l3-1;203;3-27];A+6*BA*BA.*BA/Br2A."2arts1852-10467105155349arts=684462309-72596148-23247ans=121024680261一9—13049arts16.4000-13.60007.600035.8000-76.2

4、00050.200074.2000-156.800078.8000ans=131238628323356860108221538085716ans=144115616115649756994225494x=0:pi/100:2*pi；kJ回凶y=2*exp(-0.5*x).*sin(2*pi*x);plot(x，y),boxoffFigure1EileEdit父iewInsertloolsH^sktopWindowHelp实验一：时域分析(1)正弦信号EileEditMiewInsertloolsHesktopWindow

5、Help、□盛s曇n®□囡1HQf(t)=sin(2pit)(2)抽样信号EileEdit.MiewInsertloolsDesktopWindowHelp□盛H曇□回■Q22.533.544.555.56Eile£dit父iewInsertLoolsHesktopWindowHelpD盛H曇fe戈叹SaQ32.521.510.50-0.5-1(4)实指数信号（5）虚指数信号(3回S3210051015EileEditMiewInsertToolsHesktopWindowHelp□运s曇□囡HO虚部相角实部0123012

6、3虚部相角EileEditMiewInsertloolsHesktopWindowHelpD运H曇I□s■口Figure11□'xEile£dit父iewInsertloolsHesktopWindowHelpEileEditYiewInsertloolsResistopWindowHelp□运HSfe叹0f1(k)f2(k)21D实部虚部相角(11)信号的时移Figuure□回®□运S曇□SVox(t)x(t+2>x(t-2)Figurel二互ZEileEditMiewInsertToolsHesktopWindowHe

7、lp□运ES曇我叹o®遲□S■Qf(4)HK

8、Figure1□回区1EileEditMiewInsertToolsHesktopWindowHelp□盛S昼1□SIH0f⑴(15)信号的尺度变换□回®EileEditMiewInsertToolsResktopWindowHelp□运ES暴fe呔叹O®漘□SaQ234567(17)信号的周期延扩Figure1Eile£ditewInsertloolsBesktopWindowHelp1□运S曇遲I□回I■回周期信号非周期信号课后题：Q1-3functiony=delta(t

9、)dt=O.01y=(u(t)-u(t-dt))/dtfunctiony=u(t)y=(t〉=0)Ql-5t=-3:0.001:3x=exp(-0.5*t).*u(t)subplot(121),plot(t,x)y=exp(-0.5*(1.5*t+3)).*u(l.5*t+3)subplot(122),