信号处理仿真(MATLAB)实验

信号处理仿真(MATLAB)

实验指导书

青岛大学自动化工程学院电子工程系

2006年4月

MATLAB 实验一

一、实验目的：

1. Be familiar with MATLAB Environment

2. Be familiar with array and matrix

3. Be familiar with MATLAB operations and simple plot function

二、实验内容：

1. Be familiar with Matlab 6.5

Startup Matlab 6.5, browse the major tools of the Matlab desktop ⏹ The Command Windows

⏹ The Command History Windows ⏹ Launch Pad

⏹ The Edit/Debug Window ⏹ Figure Windows

⏹ Workspace Browser and Array Editer ⏹ Help Browser

⏹ Current Directory Browser

PART I:下列选择练习，不需提交实验报告

1． Give the answer of the following questions for the array

1.10.0

2.1

3.50.01.16.62.83.4

12.10.10.30.41.31.4

5.1

0.0

1.10.0

a r r a y -⎡⎤

⎢

⎥-⎢⎥=

⎢⎥-⎢

⎥-⎣⎦ 1）What is the size of array1?

2）What is the value of array1(4,1)?

3）What is the size and value of array1(:,1:2)?

4） What is the size and value of array1([1 3], end)? 2． Give the answer of the following commad 1) a=1:2:5; 2) b=[a ’ a ’ a ’]; 3) c=b(1:2:3,1:2:3); 4) d=a+b(2,:) 5) w=[zeros(1,3) ones(3,1)’ 3:5’] 3． Give the answer of the sub-arrays

1.10.0

2.1

3.50.01.16.62.83.4

12.10.10.30.41.31.4

5.1

0.0

1.10.0

a r r a

y -⎡⎤

⎢

⎥-⎢⎥=⎢⎥-⎢

⎥-⎣⎦ 1) array1(3,:); 2) array1(:,3); 3) array1(1:2:3,[3 3 4]) 4) array1([1 1],:)

4． Give the answer of the following operations 2

2111

,,,(2)

1

20

22

a b c d e y e --⎡⎤⎡

⎤⎡⎤====⎢

⎥⎢⎥⎢⎥--⎣⎦⎣

⎦⎣⎦ 1) a+b 2) a*d 3) a.*d 4) a*c

5) a.*c 6)a\b 7) a.\b 8)a.^b

PART I:下列选择练习，不需提交实验报告

1．Edit & Run the m-file

% test step response function

wn=6; kosi=[0.1:0.1:1.0 2]; figure(1); hold on for kos=kosi

num=wn^2; den=[1,2*kos*wn,wn.^2]; step(num,den)

end

hold off;

2．Edit & Run the m-file

% test plot function

x=0:pi/20:3*pi; y1=sin(x); y2=2*cos(2*x); plot(x,y1,'rv:',x,y2,'bo--');

title('Plot the Line of y=sin(2x) and its derivative'); xlabel('X axis'); ylabel('Y axis'); legend('f(x)','d/dx f(x)'); grid on;

3． Edit & Run the m-file

% test subplot and loglog function

x=0:0.1:10; y=x.^2-10.*x+26; subplot(2,2,1); plot(x,y); grid on;

subplot(2,2,2); semilogx(x,y); grid on; subplot(2,2,3); semilogy(x,y); grid on; subplot(2,2,4); loglog(x,y); grid on;

4．Edit & Run the m-file

% test max and plot function

volts=120; rs=50; rl=1:0.1:100;

amps=volts./(rs+rl); pl=(amps.^2).*rl; [maxvol,index]=max(pl); plot(rl,pl,rl(index),pl(index),'rh'); grid on;

MATLAB 实验二

一、实验目的：

1. Learn to design branch statements program

2. Be familiar with relational and logical operators

3. Practice 2D plotting