On Mar 25, 6:59*am, "vimmi" <vimal.veeren...@gmail.com> wrote:
> To all the members of this community,
> iam doing my project on ultrasonic signal processing.
> i need to design a matched filter,to remove the white noise from the
> received signal(it is the signal received by ultrasonic receiver sensor).
> as iam having very little knowledge about signal processing i dont know
> how to design a matched filter practically for a given frequency around
> 40KLHz.The only thing that i know about matched filter is that it performs
> mathematical convolution function.
> *CAn anybody help me to do that?

What you're looking for is probably a Wiener filter, not a matched
filter. Matched filter is for decoding of a communication signal.

Since they are both a "filter," they are implemented by convolution.

Now, are you looking for help on:
1) Designing a Wiener filter, or
2) Implementing one, given that you have a design, or
3) Both?

To design a Wiener filter, you need to assume that your signal
of interest is stationary, and you need to estimate or derive its
spectrum.

If you do a google search, there are many explanations of
how to do a convolution in software or hardware.

Julius