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Related Experiment Video

Updated: Feb 28, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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Joint Sensing and Secure Communications in RIS-Based Symbiotic Radio Systems.

Junhong Yang1, Ke-Wen Huang1

  • 1College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China.

Entropy (Basel, Switzerland)
|February 27, 2026
PubMed
Summary

This study optimizes secure communications and sensing in reconfigurable intelligent surface (RIS)-based symbiotic radio (SR) systems. Interference cancellation strategies improve system performance and secrecy rates.

Keywords:
dual-functional radar and communicationintegrated sensing and communicationreconfigurable intelligent surfacesecure communicationssymbiotic radio

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Area of Science:

  • Wireless Communications
  • Signal Processing
  • Information Theory

Background:

  • Reconfigurable Intelligent Surfaces (RIS) are emerging as a key technology for enhancing wireless communication systems.
  • Symbiotic Radio (SR) enables devices to share spectrum opportunistically, improving spectral efficiency.
  • Dual-functional radar and communication base stations (DFRC-BS) integrate sensing and communication functionalities.

Purpose of the Study:

  • To investigate joint sensing and secure communication in an RIS-assisted SR system with a DFRC-BS.
  • To analyze two SR settings: parasitic SR (PSR) and commensal SR (CSR).
  • To develop strategies for mitigating RIS interference in sensing and communication.

Main Methods:

  • Formulating optimization problems to maximize the sum secrecy rate while ensuring sensing and backscatter performance.
  • Proposing two interference handling strategies: direct sensing and sensing with interference cancellation.
  • Employing a block coordinate ascend algorithm to solve non-convex optimization problems.

Main Results:

  • Interference cancellation at the DFRC-BS significantly improves overall system performance.
  • The commensal SR (CSR) setting achieves higher sum secrecy rates compared to parasitic SR (PSR).
  • Simulation results validate the effectiveness of the proposed strategies.

Conclusions:

  • Interference management is crucial for effective RIS-based SR systems.
  • The choice of SR setting impacts system performance, with CSR offering advantages.
  • The proposed optimization framework and algorithms effectively address the challenges of joint sensing and secure communication.