信号与系统信号与系统Matlab实验系列.docxVIP

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。源程序及执行结果分析1. 用MATLAB表示连续信号：，，。(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*exp(alpha*t));xlabel(t) ;ylabel(f(t)) ;grid on%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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)) ;grid on%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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) ;ylabel(f(t)) ;grid on（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=-20:0.2:20;y=sinc(t/pi);plot(t,y)title(抽样信号Sa(t));grid on %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 矩形脉冲信号 y = rectpuls(t,w) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 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]);grid on%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 三角脉冲信号 y=tripuls(t,width, skew) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% t=-10:0.05:10;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]);grid on（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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 3.编写特定的函数图象 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%t=-20:0.05:2