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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
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