The Chi^2 distribution is well used to analysis the performance of the
wireless communication systems with Chi^2 distributed SNR. Similarly, we
need the Chi distribution to know its gain, while Chi^2 denotes its
power. In this article, I support Johan�s method with the reference of
the related internet site, and ask one dimplr question to know the pdf
of the proposed random variable.

Johan Kullstam wrote:
> The chi is just the square-root of the chi^2.

You're very right! 

I found the site, where same explanation to your one is presented.
Site address is 
"http://mathworld.wolfram.com/ChiDistribution.html.";

In addtion, Chi pdf is also called as 'Generalized Rayleigh pdf', which
is described in Proakis book.

However, please let me know this: what is this pdf, which I said in
upper article?
  X(1,n) = sqrt(X(2,n))*exp(j*2*Pi*theta), 
  where theta is uniform random variable between 0 and 1. 

In summary, Chi random variable was found to be denoted as sqrt of Chi^2
one, and one simple question to ask the pdf of the proposed variable is
dictated.

Best,

Sungjin Kim
i-Networking Lab, Samsung AIT.
([EMAIL PROTECTED])
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