Robust Beamforming Design for Secure V2X Downlink System with Wireless Information and Power Transfer under a...

Area of Science:

• Wireless communication
• Information theory
• Signal processing

Background:

• Vehicle-to-everything (V2X) systems offer potential for traffic safety and efficiency.
• Simultaneous wireless information and power transfer (SWIPT) is crucial for powering vehicular devices.
• Secure data transmission and energy harvesting in V2X networks present significant challenges.

Purpose of the Study:

• To develop a robust secure beamforming scheme for V2X downlink systems.
• To maximize minimum harvested energy among energy receivers under specific constraints.
• To ensure secure communication while considering imperfect channel state information (CSI) and nonlinear energy harvesting (EH).

Main Methods:

• Formulation of a non-convex optimization problem to maximize minimum harvested energy.
• Application of semidefinite relaxation (SDR) and variable substitutions to solve the problem.
• Consideration of imperfect channel state information (CSI) and nonlinear energy harvesting (EH) models.

Main Results:

• The proposed scheme effectively maximizes harvested energy while meeting security and performance thresholds.
• The semidefinite relaxation (SDR) technique provides a tight and optimal solution.
• The robust secure beamforming scheme demonstrates superior performance compared to existing methods.

Conclusions:

• The developed beamforming scheme enhances V2X communication security and energy efficiency.
• The integration of SWIPT with robust beamforming is a viable strategy for future vehicular networks.
• The study provides a practical framework for secure and efficient V2X communication systems.