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In this article, we employ two distinct methods to derive simple closed-form approximations for the
statistical expectations of the positive integer powers of Gaussian probability integral Eg [Qp ( bWg )]
respect to its fading signal-to-noise ratio (SNR) g random variable. In the first approach, we utilize the
shifting property of Dirac delta function on three tight bounds/approximations for Q(.) to circumvent the
need for integration.