Convolution, discrete time (not using conv)

2011 12 17
2 个回答
更新时间：2017 7 24
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0 个投票

Write a MATLAB routine that generally computes the discrete convolution between two discrete signals in time-domain. (Do not use the standard MATLAB “conv” function.) • Apply your routine to compute the convolution rect( t / 4 )*rect( 2 t / 3 ).

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umar
umar 2011-12-18
If i use below coding, how to put rect(t/4) and rect(2t/3)in x and h? Please can anyone answer this?
% A GENERALAZED CONVOLUTION COMPUTING CODE IN MATLAB WITHOUT USING MATLAB BUILTIN FUNCTION conv(x,h)
close all
clear all
x=input('Enter x: ')
h=input('Enter h: ')
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
Y
stem(Y);
ylabel('Y[n]');
xlabel('----->n');
title('Convolution of Two Signals without conv function');
Friðrik Hover
Friðrik Hover 2016-2-21
Running this code and and also the built in conv function to convolute two signals makes the x axis wrong. How do you fix that?

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回答（2 个）

Naz
Naz 2011-12-17

0 个投票

just implement the equation http://en.wikipedia.org/wiki/Convolution#Circular_discrete_convolution and use sum from 1 to N instead of 0 to N-1

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umar
umar 2011-12-17
that is for calculation right? How to make a coding in matlab?
Wayne King
Wayne King 2011-12-17
I think Naz has given you some direction here, but you have just posted your homework problem. If you show what you have coded in trying to solve your homework problem, people are generally more helpful.
umar
umar 2011-12-17
to be honest. We are taking signal course. We do not learn about MATLAB in this course. Actually, i do not have any idea how to start.

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提问:

umar
umar
2011-12-17

回答：

sahiba tasneem
sahiba tasneem
2017-7-24

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