MatLab Programs - IMPULSE - STEP - SINE - COSINE -TRIANGULAR - SAWTOOTH - EXPONENTIAL SIGNALS GROWING DECAYING -

 MatLab Programs

 

In this post the matlab code for basic DSP signal generation  are available. These are tested and outputs are also added.

• Impulse signal
• Step signal (Delayed Step)
• Sine signal
• Cosine signal
• Triangular signal
• Sawtooth signal
• Exponential signals growing & decaying

Matlab code for unit impulse signal generation:

clc;

clear all;

close all;

disp('Unit Impulse Signal Generation');

N=input('Enter no of samples: ');

n=-N:1:N;

x=[zeros(1,N),1,zeros(1,N)];

stem(n,x);

xlabel('Sample');

ylabel('Amplitude');

title('Unit Impulse Signal');

In this, the impulse is generated by using ZEROS(x,y) function, which produces an array of size X,Y with all elements as ZERO.

 OUTPUT:

 Matlab code for unit ramp signal generation:

clc;

clear all;

close all;

disp('Unit Ramp Signal Generation');

N=input('Enter no of samples: ');

a=input('      Max Amplitude: ');

n=-N:1:N;

x=a*n/N;

stem(n,x);

xlabel('Sample');

ylabel('Amplitude');

title('Unit Ramp Signal');

  OUTPUT:

 Matlab code for unit step (delayed step) signal generation:

 clc;

clear all;

close all;

disp('Delayed Unit Step Signal Generation');

N=input('Enter no of samples: ');

d=input('Enter  delay  value: ');

n=-N:1:N;

x=[zeros(1,N+d),ones(1,N-d+1)];

stem(n,x);

xlabel('Sample');

ylabel('Amplitude');

title('Delayed Unit Step Signal');

  OUTPUT:

Matlab code for discrete sinusoidal signal generation:

clc;

clear all;

close all;

disp('Sinusoidal Signal generation');

N=input('Enter no of samples: ');

n=0:0.1:N;

x=sin(n);

figure, stem(n,x);

xlabel('Samples');

ylabel('Amplitude');

title('Sinusoidal Signal');

    

The SIN(n) function returns an array which corresponds to sine value of the array ‘n’

 OUTPUT:

Matlab code for discrete cosine signal generation:

clc;

clear all;

close all;

disp('Cosine wave generation');

N=input('Enter no of samples');

n=0:0.1:N;

x=cos(n);

figure, stem(n,x);

xlabel('Samples');

ylabel('Amplitude');

title('Cosine');

The COS(n) function returns an array which corresponds to cosine value of the array ‘n’

 OUTPUT:

Matlab code for  Trinangular or Sawtooth signal generation:

clc;clear all;

n=input('Enter the no samples: ');

x=0:0.1/n:20;

s=sawtooth(x);

t=sawtooth(x,0.5); % width=0.5 for Triangular signal

subplot(2,1,1),

plot(x,s),

xlabel('Time'),

ylabel('Amplitude'),

title('Sawtooth signal');

subplot(2,1,2),

plot(x,t),title('Triangular signal'),

xlabel('Time'),

ylabel('Amplitude');

 OUTPUT:

Matlab code for  exponentially decaying signal generation:

clc;

clear all;

close all;

disp('Exponential decaying signal');

N=input('Enter no of samples: ');

a=1;

t=0:0.1:N;

x=a*exp(-t);

figure,plot(t,x);

xlabel('Time');

ylabel('Amplitude');

title('Exponentially Decaying Signal');

 OUTPUT:

Matlab code for  exponentially growing signal generation:

 clc;

clear all;

close all;

disp('Exponential growing signal');

N=input('Enter no of samples: ');

a=1;

t=0:0.1:N;

x=a*exp(t);

figure,stem(t,x);

xlabel('Time');

ylabel('Amplitude');

title('Exponentially Decaying Signal');

 OUTPUT:

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