Finding bandwidth and halfpower(3dB)

Discussion in 'Homework Help' started by uofmx12, Sep 5, 2011.

  1. uofmx12

    Thread Starter Member

    Mar 8, 2011
    55
    0
    signal s(t)= (2a) / (t2+a2)
    A) Determine the essential bandwidth B Hz of s(t) such that the energy contained in the spectral components of s(t) of frequency below B Hz is 99% of the signal energy.
    B) Determine the half-power or 3dB bandwidth of the signal


    With this, I am not quite sure where to start for part A.
     
  2. TBayBoy

    Member

    May 25, 2011
    148
    19
    Generally the people here want to see your work, and will give hints.
     
  3. uofmx12

    Thread Starter Member

    Mar 8, 2011
    55
    0
    To find parts to both A and B, I needed to find the signal energy of the signal given. When I did this using ∫s^2(t) dt from -infinity to infinity. I did this and got 2π / a. Can someone check this and I should be able to do the rest. I had someone else get 4πa and not sure if that is correct, I did not get that.
     
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