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: Averaging in tthe frequency domain

  1. Sep 7, 2011 #1
    I have several Power Spectrua that I want to average into a single representative power spectrum. Then, I have to analize the amplitude spectrum of the average (i.e. sqrt(power spectrum))
    Doing that doesn't give the same result as averaging the amplitude spectrums.

    Supose I have tho spectrums that I want to average, each having one datapoint , whose power are A and B, respectively. a and b are the square roots of A and B, so


    Method 1:
    sqrt{ (A+B)/2 }= sqrt{ (a^2+b^2)/2 }

    Method 2:

    I suspect that I'm coliding with Schwarz innequality (or triangular inequality)

    What do you recommend me to progress in my ferequency domain analisis???

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted