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What is the sum of non-central chi-square PDF?

  1. Feb 10, 2017 #1
    1. The problem statement, all variables and given/known data
    What is the PDF of the sum of L, i.i.d, non-central chi-square random variables.
    The PDF of the non-central chi-square is:
    fX(x)= ((1+k)*exp(-k))/(m) *exo(-(1+k)*x/(m)) * I_0(2*sqrt(k*x*(1+k)/m)).

    where m is the average value of x, k is the LOS component.
    I took the equation from "Digital communication over fading channel" book.

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
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