1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Discrete Time Fourier Transform

  1. Apr 8, 2013 #1
    Find the DTFT of:

    h[n]=(-1)[itex]^{n}[/itex][itex]\frac{sin(\frac{\pi}{2}n}{sin(\pi n}[/itex]

    useful properties:

    x[n]y[n] --> X[Ω]*Y[Ω]

    [itex]\frac{sin(\frac{\pi}{2}n}{sin(\pi n}[/itex] --> rect[[itex]\frac{2Ω}{\pi}[/itex]

    I have no clue how to deal with the (-1)[itex]^{n}[\itex] the DTFT of that doesn't converge. . .

    any help would be appreciated
  2. jcsd
  3. Apr 8, 2013 #2


    User Avatar
    Science Advisor
    Gold Member

    Why do you say that?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted