Tighter and Stable Bounds for Marcum Q-Function

Details Tighter and Stable Bounds for Marcum Q-Function Tighter and Stable Bounds for Marcum Q-Function

2007-12-23

arxiv.org/abs/0712.3896v1

Computer Science

Information Theory

7 pages. Submitted to IEEE Transactions on Information Theory

Scientific paper

This paper proposes new bounds for Marcum Q-function, which prove extremely tight and outperform all the bounds previously proposed in the literature. What is more, the proposed bounds are good and stable both for large values and small values of the parameters of the Marcum Q-function, where the previously introduced bounds are bad and even useless under some conditions. The new bounds are derived by refined approximations for the 0th order modified Bessel function in the integration region of the Marcum Q-function. They should be useful since they are always tight no matter the parameters are large or small.

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