# Power Allocation for Secure SWIPT Systems with Wireless-Powered Cooperative Jamming

## TL;DR

This paper proposes an optimal power allocation scheme for secure wireless-powered cooperative jamming systems, enhancing secrecy rates by jointly optimizing transmitter and jammer power while ensuring energy harvesting constraints.

## Contribution

It introduces a novel joint power allocation method for secure SWIPT systems with cooperative jamming, providing an optimal solution for non-convex problems.

## Key findings

- Proposed scheme outperforms benchmark schemes in secrecy rate.
- Optimal power allocation enhances security and energy harvesting efficiency.
- Simulation results validate the effectiveness of the proposed method.

## Abstract

This paper considers wireless-powered cooperative jamming (CJ) to secure communication between a transmitter (Tx) and an information receiver (IR), in the presence of an energy receiver (ER) which is termed as a potential eavesdropper. The full-duplex jammer harvests energy from the Tx's information signal and transmits jamming signal at the same time, where the jamming signal not only confounds the ER (potential eavesdropper) but also charges the ER. Our goal is to maximize the secrecy information rate by jointly optimizing the power allocation at the Tx and jammer while maintaining the harvested energy requirement of the ER. The studied problem is non-convex and we propose the optimal solution based on the Lagrange method. Simulation results show that the proposed scheme significantly outperforms the benchmark schemes.