0
$\begingroup$

I am trying to figure out what seems very trivial thing about down sampling and up sampling. The problem that I am facing is how to find the effects of up sample on a signal followed by a filter and/or a filter followed by down sampling. Here is a problem related to this from the Oppenhiem and Schafer book.

enter image description here

I am trying to see what happens to x[n] after it pass the hlp[n], considering that hlp[n] has wc = pi/4. Will there be a gain on this or just the frequency is affected?

Please help, Thanks in advance

|improve this question
$\endgroup$
0
$\begingroup$

do you go to concordia by any chance? this question looks waaaayyy to famaliar. :)

I asked a similar question a while back, the answers provided there should help.

up sample and down sample

|improve this answer
$\endgroup$
0
$\begingroup$

I think, this will act like low pass filter with $\pi/2$ instead of $\pi/4$ cutoff frequency

|improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.