Howdy Manisha,
I did a web search on "Quadrature Mirror Filter bank" and found this:
http://www.dsprelated.com/groups/matlab/show/2747.php
which looks like a word for word copy of this question. The date on that
question was 2004, so my bet is that this is a standard homework problem.
It looks like there is a lot of info on the web, and some of it will have
references to books which you may have in a nearby library. For research,
the library is a really good place to start.
Patience, persistence, truth,
Dr. mike
On Wed, 23 Jun 2010, manisha pratihast wrote:
> Respected All,
>
> I am manisha, I am persuing M.tech and doing research on Multirate DSP, In
that I am interested in QMF
> Design and its application using MATLAB, I read it as Perfet reconstruction
filter, why is it so?.
> Are there any advantages or disadvantage using this Quadrature Mirror Filter
bank.
>
> One More question?
> The Frequency response of QMF looks like aliasing, why is it so,
> though there is aliasing we are reconstructiong perfectly, how is it
possible.
>
> Please answer my query.
> Regards
> manisha pratihast