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!

Very challenging! Digital signal processing.

  1. Feb 26, 2009 #1
    1. The problem statement, all variables and given/known data

    Signal x(n)= (1/sqrt(n)) * u(n)
    1.Find the energy of the signal.
    2.Is the energy finite or infinite?


    2. Relevant equations

    sum|x(n)|^2 = energy

    3. The attempt at a solution
     
  2. jcsd
  3. Feb 26, 2009 #2
    You are basically being asked to test the convergence of the series with term 1/n, n ranging from 1 to infinite.
     
  4. Feb 26, 2009 #3
    I know, I just can´t calculate it out.
    Can you please helpe me?

    And how do I know if it´s finite or not?
     
  5. Feb 26, 2009 #4
  6. Feb 27, 2009 #5
    It would be helpful if you could show your working

    Also, does u(n) = unit step function with n as the parameter ?
     
    Last edited: Feb 27, 2009
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook