Discrete convolution.
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Hi, im trying to make certain examples of convolution codes for a function with N elements. so far I have done this. But I wish to find out a way so that it can be implemented on C too. any ideas or help?
clear all; close all; clc
x=[1 2 3]
h=[-1 0 3]
Z=[0]
[M,N]=size(x)
[L,O]=size(h)
a=1
A=N+O-1
suma=[0]
for n=1:1:N
for o=1:1:O
y(n,o)=x(n)*h(o)
end
end
s=fliplr(y);
n=-1*(N-1);
for r=1:A
Yfor(r)=sum(diag(s,n))
n=n+1;
end
Yconv=fliplr(Yfor)
%Yfor=0
%Yfor(1)=y(1,1)
%Yfor(2)=y(2,1)+y(1,2)
%Yfor(3)=y(3,1)+y(2,2)+y(1,3)
%Yfor(4)=y(3,2)+y(2,3)
%Yfor(5)=y(3,3)
Y=conv(x,h)
figure, stem(x)
grid on
figure,stem(Yconv) grid on
2 comentarios
Walter Roberson
el 26 de Nov. de 2011
Everything other than the conv() and the graphics should be easy to do in C.
For example, since you do not use s after taking the diag() of it, you can just design your equivalent to diag to index right to left instead of left to right.
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