信号与系统课程设计信号与系统Matlab实验系列.docx

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(rectpuls(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。:,,。(1)源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*exp(alpha*t)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%A=1;alpha=-;t=-10::10;f=A*exp(alpha*t);plot(t,f)title('f(t)=A*exp(alpha*t)');xlabel('t');ylabel('f(t)');gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*cos(omega0*t+phi)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10::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)');gridon%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=A*sin(omega0*t+phi)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10::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');ylabel('f(t)');gridon(2)执行结果2、用MATLAB表示抽样信号(sinc(t))、矩形脉冲信号(rectpuls(t,width))及三角脉冲信号(tripuls(t,width,skew))。(1)源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%f=sinc(t)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-20::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)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-10::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::10;w=1;%脉宽为1f=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]);gridon(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3(1)源程序%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-20::20;w1=12;w2=4;%分别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fig