Energy-Efficient Precoding for Multi-User Visible Light Communication with Confidential Messages

TL;DR

This paper proposes an energy-efficient precoding scheme for multi-user visible light communication systems that enhances physical layer security by ensuring message confidentiality, using advanced optimization algorithms.

Contribution

It introduces a novel precoding design approach for VLC systems that optimizes energy efficiency while maintaining confidentiality, employing Dinkelbach and CCCP algorithms.

Findings

The proposed scheme converges reliably across various parameters.

It improves energy efficiency in secure VLC communications.

Numerical results validate the effectiveness of the approach.

Abstract

In this paper, an energy-efficient precoding scheme is designed for multi-user visible light communication (VLC) systems in the context of physical layer security, where users' messages are kept mutually confidential. The design problem is shown to be non-convex fractional programming, therefore Dinkelbach algorithm and convex-concave procedure (CCCP) based on the first-order Taylor approximation are utilized to tackle the problem. Numerical results are performed to show the convergence behaviors and the performance of the proposed solution for different parameter settings.