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1、信号与系统课程设计报告2013—2014学年第二学期课程名称：信号与系统设计题目：信号与系统Matlab实验系列学院：专业班级：学号：姓名：指导老师：目录实验一连续时间信号时域分析1实验二离散时间信号时域分析5实验三连续时间系统时域分析9实验四离散时间系统时域分析11实验五连续时间信号频域分析13实验六连续时间系统频域分析18实验七信号采样与重建24实验八传输函数与系统特性28感想与心得32实验一连续时间信号时域分析一、实验内容1、用MATLAB表示连续信号：，，。2、用MATLAB表示抽样信号(sinc(t))、矩形脉冲信号(rectp
2、uls(t,width))及三角脉冲信号(tripuls(t,width,skew))。3、编写如图3的函数并用MATLAB绘出满足下面要求的图形。二、源程序及执行结果分析1.用MATLAB表示连续信号：，，。1(1)源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*exp(alpha*t)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%A=1;alpha=-0.3;t=-10:0.01:10;f=A*exp(alpha*t);plot(t,f)title('f(t)=A
3、*exp(alpha*t)');xlabel('t');ylabel('f(t)');gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*cos(omega0*t+phi)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10:0.01:10;A=1;omega0=pi;phi=pi/3;f=A*cos(omega0*t+phi);plot(t,f)title('f=A*cos(omega0*t+phi)');xlabel('t');ylabel('f(t)');
4、gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*sin(omega0*t+phi)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10:0.01:10;A=1;omega0=pi;phi=pi/3;f=A*sin(omega0*t+phi);plot(t,f)title('f=A*sin(omega0*t+phi)');xlabel('t');2ylabel('f(t)');gridon2（2）执行结果2、用MATLAB表示抽样信号(sinc(t))、矩形脉
5、冲信号(rectpuls(t,width))及三角脉冲信号(tripuls(t,width,skew))。2（1）源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=sinc(t)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-20:0.2:20;y=sinc(t/pi);plot(t,y)title('抽样信号Sa(t)');gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%矩形脉冲信号y=rectpuls(t,w)%%%%%%%%
6、%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10:0.05:10;w=1;%脉宽为1f=rectpuls(t,w);%（自变量t，脉宽w）plot(t,f);title('f(t)=rectpuls(t,w)');xlabel('t');axis([-2,2,-2,2]);gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%三角脉冲信号y=tripuls(t,width,skew)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10:0.05:10
7、;w=1;%脉宽为13f=tripuls(t,w);%（自变量t，脉宽w）plot(t,f);title('f(t)=tripuls(t,w)');xlabel('t');axis([-2,2,-2,2]);gridon3（2）执行结果3、编写如图3的函数并用MATLAB绘出满足下面要求的图形。图33（1）源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%3.编写特定的函数图象%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-20:0.05:20;w1=12;w2=4;%分别
8、设定矩形脉冲和三角脉冲的脉宽f1=4*rectpuls(t-6,w1);%使用单位矩形脉冲和单位三角脉冲来对图象进行描述f2=3*tripuls(t-6,w2);f=f1+f2;%波的叠加fi
