Design filter by Rectangular window function

Matlab program to design filter by Rectangular window function.

Matlab code

clc; close all; clear all; 

Wc=.5*pi;

taps=25; % No of taps 

N=taps-1; % Filter order 

Analog-to-Digital filter conversion

Matlab program for Analog-to-Digital filter conversion. This program convert Analog Domain signal to Digital domain. 

Matlab code

% Let Transfer function in Analog Domain is (s^2+2s+1)/(s^3+5s^2+11s+15)

clc; close all; clear all; b=[1,2,1];

a=[1,5,11,15];

fs=5; %Sampling frequency

Chebyshev Type 2 Digital Band Stop Filter

Matlab program to design Chebyshev Type 2 Digital Band Stop Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 2 Digital Band Pass Filter

Matlab program to design Chebyshev Type 2 Digital Band Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 2 Digital High Pass Filter

Matlab program to design Chebyshev Type 2 Digital High Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 2 Digital Low Pass Filter

Matlab program to design Chebyshev Type 2 Digital Low Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 1 Digital Band Stop Filter

Matlab program to design Chebyshev Type 1 Digital Band Stop Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 1 Digital Band Pass Filter

Matlab program to design Chebyshev Type 1 Digital Band Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 1 Digital High Pass Filter

Matlab program to design Chebyshev Type 1 Digital High Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Chebyshev Type 1 Digital Low Pass Filter

Matlab program to design Chebyshev Type 1 Digital Low Pass Filter

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Butterworth Digital Band Stop Filter

Matlab program to design Butter-worth Digital Band Stop Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Butterworth Digital Band Pass Filter

Matlab program to design Butter-worth Digital Band Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

fpc=input('Enter the Passband corner frequency (In Hz) = ');

Butterworth Digital High Pass Filter

Matlab program to design Butter-worth Digital High Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = ');

rs=input('Enter the Stopband attenuation (In db) = ');

Butterworth Digital Low Pass Filter

Matlab program to design Butter-worth Digital Low Pass Filter.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

rs=input('Enter the Stopband attenuation (In db) = '); 

Remez exchange algorithm

Matlab program for Remez exchange algorithm.

[n,fo,ao,w] = firpmord(f,a,dev,fs). Finds the approximate order, normalized frequency band edges, frequency band amplitudes, and weights.

b = firpm(n,f,a,w) returns row vector b containing the n+1 coefficients of the order n FIR filter whose frequency-amplitude characteristics match those given by vectors f and a.

Matlab code

clc; clear all; close all;

rp=input('Enter the Passband ripple (In db) = '); 

Circular Convolution Method 3

Matlab program to find Circular Convolution by using for loop function.

Two another methods of Circular Convolution:  Using fft and ifft predefined function and By matrix multiplication.

Matlab code

clc;

close all; clear all;

x=input('Enter the 1st sequence x[n] = '); 

h=input('Enter the 2nd sequence h[n] = ');

Circular Convolution Method 2

Matlab program to find Circular Convolution by matrix multiplication using circshift command.

Two another methods of Circular Convolution:  Using fft and ifft predefined function and By using for loop function.

Matlab code

clc;close all; clear all;

x1=input('Enter the 1st sequence x[n] = ');
h1=input('Enter the 2nd sequence h[n] = ');

Circular Convolution Method 1

Matlab program to find Circular Convolution using fft and ifft predefined function.

Circular Convolution: If x(n) is a sequence of N1 number of samples and h(n) with N2 samples, after convolution y(n) will have N=max(N1,N2) samples.

It cannot be used to find the response of a filter. Zero padding is necessary to find the response of a filter.

Two another methods of Circular Convolution: By matrix multiplication and By using for loop function.

Linear Convolution

Matlab program to find Linear Convolution of given signals.

Linear Convolution: If x(n) is a sequence of N1 number of samples and h(n) with N2 number of samples, after convolution y(n) will have N=N1+N2-1 samples.

It can be used to find the response of a linear filter.

Zero padding is not necessary to find the response of a linear filter.

Matlab code

clc;

clear all; close all;

Z-transform

Matlab program to find Z-transform, Inverse Z-transform, Zeroes and Poles of given sequence.

Matlab code

clc;

close all; clear all; syms n z;

y=input('Enter the sequence x[n]: '); % Where n is sequence variable