信号与系统实验.doc

实验目的通过基于matlab的实验,加深对理论课程的理解初步掌握用matlab绘图、微积分、解微分差分方程的方法初步掌握matlab在信号系统中的应用实验内容一、信号的描述、运算、绘图用MATLAB生成下列函数,连续信号用plot,离散信号用stem绘图(1)t=linspace(0,5,11);y=stepfun(t,0);plot(t,y)t=linspace(0,10,51);y=stepfun(t,0);z=sin(t).*y;plot(t,z)t=linspace(0,10,101);y=stepfun(t,0);z=exp(-t).*y.*cos(t);plot(t,z)t=linspace(-2,2,1001);y=rectpuls(t,2);plot(t,y)t=-3*pi::3*pi;x=sinc(t);plot(t,x);gridon(2)k=linspace(-5,5,101);x=cos(1/2*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(1/8*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(1/4*pi*k);stem(k,x)k=linspace(-5,5,101);x=cos(pi*k);stem(k,x)k=linspace(-5,5,101);x=cos(3/2*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(7/4*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(15/8*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(2*pi*k);stem(k,x)k=linspace(-5,5,51);x=cos(7/4*pi*k+1/3*pi);stem(k,x)k=linspace(-5,5,51);y=cos(1/3*pi*k)+j*sin(1/3*pi*k);stem(k,y)k=linspace(-5,5,51);x=cos(1/3*pi*k)+j*sin(1/3*pi*k);y=.^k;z=x.*y;stem(k,z)k=linspace(-5,5,51);y=exp(j*1/3*pi*k);stem(k,y)-5-4-3-2-1012345-1----、polar、mesh等指令用ezplot绘的图。用mesh绘的三维曲面。的取值范围是ezplot('exp(-1*t).*cos(t)',[0,10])