# On the Performance of Low-Altitude UAV-Enabled Secure AF Relaying with Cooperative Jamming and SWIPT

## TL;DR

This paper introduces a secure UAV-assisted transmission protocol using cooperative jamming and SWIPT, demonstrating improved secrecy and reliability over traditional methods in low-altitude UAV scenarios.

## Contribution

It develops a novel secure transmission protocol with analytical performance metrics for low-altitude UAV relaying incorporating cooperative jamming and SWIPT.

## Key findings

- Significant performance improvement over conventional protocols.
- Analytical expressions for CP, SOP, and secrecy rates derived.
- Simulation results verify theoretical analysis and show impact of system parameters.

## Abstract

This paper proposes a novel cooperative secure unmanned aerial vehicle (UAV) aided transmission protocol, where a source (Alice) sends confidential information to a destination (Bob) via an energy-constrained UAV-mounted amplify-and-forward (AF) relay in the presence of a ground eavesdropper (Eve). We adopt destination-assisted cooperative jamming (CJ) as well as simultaneous wireless information and power transfer (SWIPT) at the UAV-mounted relay to enhance physical-layer security (PLS) and transmission reliability. Assuming a low altitude UAV, we derive connection probability (CP), secrecy outage probability (SOP), instantaneous secrecy rate, and average secrecy rate (ASR) of the proposed protocol over Air-Ground (AG) channels, which are modeled as Rician fading with elevation-angel dependent parameters. By simulations, we verify our theoretical results and demonstrate significant performance improvement of our protocol, when compared to conventional transmission protocol with ground relaying and UAV-based transmission protocol without destination-assisted jamming. Finally, we evaluate the impacts of different system parameters and different UAV's locations on the proposed protocol in terms of ASR.