The inverse of the Marcum-Q function

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mutah
mutah 2013-10-1
评论： Muhammad Adil 2018-4-17
can any one help me on my problem which is how to get the inverse of marcum Q function
  1 个评论
Muhammad Adil
Muhammad Adil 2018-4-17
working on same problem bro ..... read this "Approximate Inversion of Marcum Q function" by Carl W helstorm, maybe it will help

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回答（1 个）

Wayne King
Wayne King 2013-10-1
编辑：Wayne King 2013-10-1
Do you have the Communications System Toolbox?
See the help for qfuncinv.m
If you don't have the CST, you can use erfcinv.m
x = [0.5000 0.1587 0.0228];
y = sqrt(2) * erfcinv(2*x);
  1 个评论
mutah
mutah 2013-10-1
my dear i mean the inverse of this equation :
Q_m(a,b) = 1/a^(m-1) * integral from b to inf of
[x^m * exp(-(x^2+a^2)/2) * I_(m-1)(ax)] dx,
where I_(m-1)() is the modified Bessel function of the first kind, of
order m-1.

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