# A Simple Evaluation for the Secrecy Outage Probability Over Generalized-K Fading Channels

## TL;DR

This paper introduces a simple, accurate approximation for the secrecy outage probability over generalized-K fading channels, facilitating analysis of secrecy performance especially at high SNR levels.

## Contribution

It presents a novel, simplified approximation for SOP over generalized-K channels and derives its asymptotic form to reveal secrecy diversity order.

## Key findings

- Approximation becomes more accurate at lower SNR of the wiretap channel.
- Asymptotic SOP provides insights into secrecy diversity order.
- Numerical results confirm high accuracy of the proposed approximation.

## Abstract

A simple approximation for the secrecy outage probability (SOP) over generalized-K fading channels is developed. This approximation becomes tighter as the average signal-to-noise ratio (SNR) of the wiretap channel decreases. Based on this simple expression, we also analyze the asymptotic SOP in the high SNR region of the main channel. Besides simplifying the SOP expression significantly, this asymptotic SOP expression reveals the secrecy diversity order in a general case. Numerical results demonstrate the high accuracy of our proposed approximation results.