Abstract
In this Letter, the authors analyse the secrecy outage probability (SOP) over fluctuating two-ray fading channels but with a different definition from the one adopted in Zeng et al. Following the new defined SOP, they derive an analytical closed-form expression for their proposed SOP, as well as an asymptotic formula valid in the high signal-to-noise ratio region of the source to destination link. In the numerical results section, they perform some Monte-Carlo simulations to validate the accuracy of their derived expressions, and also present the probability gap between their proposed SOP and the SOP in Zeng et al. .