1. Not finding help here? Sign up for a free 30min 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!

Signal Power

  1. Jan 19, 2009 #1
    1. The problem statement, all variables and given/known data

    Finding the total power in the signal y(t) = (sin t + j cos t)(u(t − 2) − u(t − 4)) .

    2. Relevant equations


    E= integral from -infinity to + infinity abs(x(t))^2 dt

    signal has finite energy if < infi


    3. The attempt at a solution

    (sin t + j cos t) = exp(jpiet)


    is this the right direction here?

    exp(jt)= 2cos(x)^2 -1 + 2sin(x)cos(x) * j

    i made the assumption that

    when you take integral of the (u(t − 2) − u(t − 4))

    its from 2-4 since the step function is = 1 and its delayed i dont know if this is correct


    integral from 2 to 4 of (2cos(x)^2-1)

    i thought i could leave out the imaginary parts
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?



Similar Discussions: Signal Power
  1. Power plants (Replies: 0)

  2. A digitised signal (Replies: 0)

Loading...