Design and Performance Analysis of an RIS-Empowered RM-DCSK System for Wireless Powered Communication.

Area of Science:

• Wireless Communication Systems
• Information Theory
• Signal Processing

Background:

• Noncoherent chaotic communication schemes offer low receiver complexity.
• Wireless Powered Communication (WPC) faces path loss challenges.
• Reconfigurable Intelligent Surfaces (RIS) can optimize wireless environments.

Purpose of the Study:

• To propose a novel RIS-empowered RM-DCSK system for WPC.
• To improve spectral efficiency and reduce receiver complexity.
• To enable sustainable uplink transmission with energy harvesting.

Main Methods:

• Developed a harvest-store-use (HSU) energy model with a finite buffer and on/off transmission policy.
• Utilized RIS to reconfigure the propagation environment and mitigate WPC path loss.
• Derived closed-form bit error rate (BER) expressions under multi-path Rayleigh fading.

Main Results:

• The proposed RIS-RM-DCSK-WPC system demonstrates superior BER performance.
• Reference reuse in RM-DCSK improves spectral efficiency and simplifies reception.
• The HSU model and on/off policy enable sustainable WPC.

Conclusions:

• The integration of RIS and RM-DCSK significantly enhances WPC performance.
• The proposed system offers a promising solution for efficient and sustainable wireless communication.
• The developed analytical framework validates the system's advantages over existing benchmarks.