RIS based covert symbiotic radio exploiting a full-duplex receiver

IF 2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2025-04-30 DOI:10.1016/j.phycom.2025.102695

Shaoqin Shi, Ke-Wen Huang

引用次数: 0

Abstract

In this paper, a reconfigurable intelligent surface (RIS) based symbiotic radio (RIS-SR) system is considered. We focus on establishing a covert RIS-based backscatter link, which is subject to detection by an adversary, by exploiting a full duplex receiver. Covert probability, which is defined as the probability that the adversary cannot reliably detect the existence of the covert backscatter link, is adopted as a measure of covertness, for which a lower bound approximation is derived. Subject to a high covert probability, we enhance the covert communications performance through jointly optimizing the active and passive beamforming. The formulated problem is non-convex, and a penalty based iterative method is proposed to handle it efficiently. Simulation results are provided to assess the performance of covert communications in the considered RIS-SR system.

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基于RIS的隐蔽共生无线电利用全双工接收机

本文研究了一种基于可重构智能表面的共生无线电（RIS- sr）系统。我们专注于建立一个隐蔽的基于ris的反向散射链路，这是受到对手的检测，利用全双工接收器。隐蔽概率被定义为对手不能可靠地检测到隐蔽反向散射链路存在的概率，作为隐蔽度的度量，并推导了隐蔽度的下界近似。在隐蔽概率较高的前提下，通过联合优化主动波束形成和被动波束形成，提高隐蔽通信性能。该问题为非凸问题，提出了一种基于惩罚的迭代方法来有效地求解该问题。仿真结果用于评估所考虑的RIS-SR系统中隐蔽通信的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Communication ENGINEERING, ELECTRICAL & ELECTRONICTELECO-TELECOMMUNICATIONS

CiteScore

5.00

自引率

9.10%

发文量

212

审稿时长

55 days

期刊介绍： PHYCOM: Physical Communication is an international and archival journal providing complete coverage of all topics of interest to those involved in all aspects of physical layer communications. Theoretical research contributions presenting new techniques, concepts or analyses, applied contributions reporting on experiences and experiments, and tutorials are published. Topics of interest include but are not limited to: Physical layer issues of Wireless Local Area Networks, WiMAX, Wireless Mesh Networks, Sensor and Ad Hoc Networks, PCS Systems; Radio access protocols and algorithms for the physical layer; Spread Spectrum Communications; Channel Modeling; Detection and Estimation; Modulation and Coding; Multiplexing and Carrier Techniques; Broadband Wireless Communications; Wireless Personal Communications; Multi-user Detection; Signal Separation and Interference rejection: Multimedia Communications over Wireless; DSP Applications to Wireless Systems; Experimental and Prototype Results; Multiple Access Techniques; Space-time Processing; Synchronization Techniques; Error Control Techniques; Cryptography; Software Radios; Tracking; Resource Allocation and Inference Management; Multi-rate and Multi-carrier Communications; Cross layer Design and Optimization; Propagation and Channel Characterization; OFDM Systems; MIMO Systems; Ultra-Wideband Communications; Cognitive Radio System Architectures; Platforms and Hardware Implementations for the Support of Cognitive, Radio Systems; Cognitive Radio Resource Management and Dynamic Spectrum Sharing.