Help needed in application of convolution

Status
Not open for further replies.
S

sreejajayesh

Newbie level 1
Joined
Feb 5, 2013
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,286
I have a one dimensional signal. I have another smaller one dimensional signal which is a part of the first signal. I want to locate its position. In a journal I read that we can use convolution for that. Can anyone throw some light on it?
 

You can locate the position looking at the correlation function between the two signals.
The correlation has a maximum where the signals are "aligned".
Its value (normalized by the standard deviations) has an absolute value <= 1. Values close to 1 correspond to high similarity.
There is a correspondence between correlation and convolution; roughly speaking:

correl(x[n],y[n],m) = k*convol(x[n],y[-n],m)

so you can use convolution as well.
Regards

Z
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…