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What is the difference between using conv function and manual coding method using MATLAB?

Asked by Chalaka Perera on 16 Sep 2019
Latest activity Edited by Bruno Luong
on 16 Sep 2019
Here I Have mentioned two different options and the option 01 has used conv function and the option 02 has used manual coding method to find discrete Convolution.
Option 1
clc
clear all
close all
n = 1: 1: 1000;
N = randn (1,1000);
s = 10*cos(0.05*n);
figure (1)
plot (s,'r')
x = s + N;
figure (2)
plot (x,'g')
h = 0.1*ones(1,10);
y1=conv (x,h);
figure (3)
plot (y1)
figure (4)
plot (s,'r')
hold on
plot (x,'g')
hold on
plot (y1)
Option 2
m = length (x);
n = length (h);
X = [x,zeros(1,n)];
H = [h,zeros(1,m)];
for i = 1: n+m-1
Y(i) = 0;
for j = 1: m
if (i - j+1 > 0)
Y(i) = Y(i)+X(j)*H(i-j+1);
else
end
end
end
figure (5)
plot (Y);
hold on

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1 Answer

Answer by Bruno Luong
on 16 Sep 2019
Edited by Bruno Luong
on 16 Sep 2019

Your twin brother/sister/class mate is faster, he/she asked the same question earlier.
Don't copy the same answer, your teacher might notice it.

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