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: Fourier Transform

  1. Jul 4, 2011 #1
    Hey I am trying to figure out this easy problem, and I dont know if I am doing this properly or not heres the questions & the work.

    x(t) = ae^(bt)*u(-t)

    F[x(t)] = a*integral[(e^bt)*e^(-jwt)*dt] upper bound = 0 lower bound = -infinity
    = [a*e^(t(b-jw))] / (b-jw)
    = a/(b-jw)
     
  2. jcsd
  3. Jul 4, 2011 #2

    ideasrule

    User Avatar
    Homework Helper

    What's u(-t), and why is it not part of the Fourier transform? Otherwise, your work is correct.
     
  4. Jul 4, 2011 #3
    u(-t) is the unit step function with a time reversal.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...