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34 MATLAB programs for
 B.tech Electronics and Communication Engineering students.

https://s5electronicsandcommunication.blogspot.com

This blog contains some of the Digital Signal Processing programs prescribed in the syllabus of the fifth semester of  B.tech Electronics and  Communication Engineering under the KTU., and many other programs too.

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To view the program code of a MATLAB program, please click on its name, from the list below.

1. MATLAB program for trapezoidal waveform
2. MATLABprogram for Z-Transform of finite duration sequence.
3. MATLAB program to plot zeros and poles of z-transform
4. MATLAB Program for Rayliegh Distribution
5. MATLAB Program for Uniform Distribution
6. MATLABProgram for Random Sequence Generation
7. MATLABprogram for normal distribution
8. MATLAB program for sampling rate conversion
9. MATLAB program for equiripple FIR filter
10. MATLAB program for Ideal LowPass Linear Phase FIR Filter
11. MATLAB program for Unfolding and Unwrapping of DFT
12. MATLAB program to find DFT and IDFT using matlab functions 
13. MATLAB program to find IDFT without using MATLAB function
14. MATLAB program to find DFT without function
15.  MATLAB program for PWM signal generation
16. MATLAB program for FM signal generation
17. MATLAB program for AM signal generation
18. MATLAB program for exponential waveform generation
19. MATLAB program for impulse waveform generation
20. MATLAB program for sawtooth waveform generation
21. MATLAB program for square wave generation
22. MATLAB program for Ramp Waveform generation
23. MATLAB program for step waveform generation
24. MATLAB Program to generate a cosine waveform
25. Matlab program to create a sinusoidal waveform
26. MATLAB Program to find the Fourier Transform of sinusiodal waveform
27. MATLAB program to perform the linear convolution of two signals (without using MATLAB function)
28. MATLAB program to perform linear convolution of two signals  ( using MATLAB functions)
29. MATLAB program to generate logarithmic curve
30. MATLAB program to perform the circular convolution of two signals
31. MATLAB program to find the Fourier Transform of cosine wave
32. MATLAB program to find the Fourier Transform of an exponential curve
33. MATLAB program for the design and implementation of Butterworth low pass filter
34. MATLAB program for the design and implementation of Butterworth high pass filter
35. My first post   (about life)

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MATLAB program for the design and implementation of Chebyshev low pass filter

Program code

%Chebyshev low pass filter

clc;

clear all;

close all;

fp=input('Please enter the pass band frequency: ');

fs=input('Please enter the stop band frequency: ');

rp=input('Please enter the pass band attenuation: ');

rs=input('Please enter the stop band attenuation: ');

sf=input('Please enter the sampling frequency: ');

wp=2*fp/sf;

ws=2*fs/sf;

[n,wn]=cheb1ord(wp,ws,rp,rs);

[b,a]=cheby1(n,rp,wn,'low');

freqz(b,a);

title('Chebyshev low pass filter');

Example of output

Please enter the pass band frequency: 2000

Please enter the stop band frequency: 1600

Please enter the pass band attenuation: .4

Please enter the stop band attenuation: 50

Please enter the sampling frequency: 8000 

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MATLAB program for the design and implementation of Chebyshev high pass filter

Program code

%Chebyshev high pass filter

clc;

clear all;

close all;

fp=input('Please enter the pass band frequency: ');

fs=input('Please enter the stop band frequency: ');

rp=input('Please enter the pass band attenuation: ');

rs=input('Please enter the stop band attenuation: ');

sf=input('Please enter the sampling frequency: ');

wp=2*fp/sf;

ws=2*fs/sf;

[n,wn]=cheb1ord(wp,ws,rp,rs);

[b,a]=cheby1(n,rp,wn,'high');

freqz(b,a);

title('Chebyshev high pass filter');

Example of output

Please enter the pass band frequency: 2000

Please enter the stop band frequency: 1600

Please enter the pass band attenuation: 0.3

Please enter the stop band attenuation: 40

Please enter the sampling frequency: 8000

__________________________

MATLAB program for the design and implementation of Chebyshev band pass filter

Program code

%Chebyshev band pass filter

clc;

clear all;

close all;

fp1=input ('Please input the first pass band frequency = ');

fs1=input ('Please input the first stop band frequency = ');

fp2=input ('Please input the second pass band frequency = ');

fs2=input ('Please input the second stop band frequency = ');

rp=input ('Please input the pass band attenuation = ');

rs=input ('Please input the stop band attenuation = ');

sf=input ('Please input the sampling frequency = ');

p1=2*fp1/sf;

s1=2*fs1/sf;

p2=2*fp2/sf;

s2=2*fs2/sf;

p=[p1,p2];

s=[s1,s2];

[n,w]=cheb1ord(p,s,rp,rs);

[f1,f2]=cheby1(n,rp,w,'bandpass');

freqz(f1,f2);

title ('Chebyshev Band Pass Filter');

Example of output

Please input the first pass band frequency = 2000

Please input the first stop band frequency = 1600

Please input the second pass band frequency = 3000

Please input the second stop band frequency = 3200

Please input the pass band attenuation = 0.5

Please input the stop band attenuation = 50

Please input the sampling frequency = 9000

_______________________

MATLAB program for the design and implementation of Butterworth band pass filter

Program code

clc;

clear all;

close all;

fp1=input ('Please input the first pass band frequency = ');

fs1=input ('Please input the first stop band frequency = ');

fp2=input ('Please input the second pass band frequency = ');

fs2=input ('Please input the second stop band frequency = ');

rp=input ('Please input the pass band attenuation = ');

rs=input ('Please input the stop band attenuation = ');

sf=input ('Please input the sampling frequency = ');

p1=2*fp1/sf;

s1=2*fs1/sf;

p2=2*fp2/sf;

s2=2*fs2/sf;

p=[p1,p2];

s=[s1,s2];

[n,w]=buttord(p,s,rp,rs);

[f1,f2]=butter (n,w,'bandpass');

freqz(f1,f2);

title ('Butterworth Band Pass Filter');

Example of output

Please input the first pass band frequency = 2000

Please input the first stop band frequency = 1700

Please input the second pass band frequency = 3000

Please input the second stop band frequency = 3200

Please input the pass band attenuation = 0.5

Please input the stop band attenuation = 60

Please input the sampling frequency = 9000

_____________________________

MATLAB program to perform linear convolution using circular convolution

Program code

%linear convolution using circular convolution

clc;

clear all;

close all;

x=input('Please enter the first sequence x[n] = ');

h=input('Please enter the second sequence h[n] = ');

len_x=length(x);

len_h=length(h);

h=[h zeros(1,len_x-1)];

x=[x zeros(1,len_h-1)];

L=len_x+len_h-1;

for i=0:L-1

    for j=1:L-i;

        a(j+i,i+1)=x(j);

    end

end

for m=1:L-1

    for n=m+1:L

        a(m,n)=x(L-n+m+1);

    end

end

b=transpose(h);

y=a*b;

y=transpose(y);

subplot(311);

stem(x);

disp('The sequence obtained after linear convolution of x[n] with h[n], is given below. ');

disp(y);

grid on;

title('First sequence x[n] ');

subplot(312);

stem(h);

grid on;

title('Second sequence h[n] ');

subplot(313);

stem(y);

Example of output

Please enter the first sequence x[n] = [1 2 3 4 5 6]

Please enter the second sequence h[n] = [1 2 3 4 5 6]

The sequence obtained after linear convolution of x[n] with h[n], is given below.

     1     4    10    20    35    56    70    76    73    60    36

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MATLAB program for the design and implementation of Butterworth high pass filter

Program code

clc;
clear all;
close all;
fp=input('Please enter the first pass band frequency: ');
fs=input('Please enter the first stop band frequency: ');
rp=input('Please enter the pass band attenuation: ');
rs=input('Please enter the stop band attenuation: ');
sf=input('Please enter the sampling frequency: ');
wp=2*fp/sf;
ws=2*fs/sf;
[n,wn]=buttord(wp,ws,rp,rs);
[b,a]=butter(n,wn,'high');
freqz(b,a);
title('Butterworth High Pass Filter');

Example of output

Please enter the first pass band frequency: 2000

Please enter the first stop band frequency: 1300

Please enter the first pass band attenuation: 0.35

Please enter the first stop band attenuation: 50

Please enter the sampling frequency: 8000

_____________________________