Secure energy efficiency maximization in cell-free networks with sub-connected active reconfigurable intelligent surface

IF 2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Physical Communication Pub Date : 2025-02-15 DOI:10.1016/j.phycom.2025.102624

Yi Wang , Junlei Zhi , Shuo Wang , Fei Zhao , Shaochuan Yang , Wanming Hao , Chunguo Li

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引用次数: 0

Abstract

We consider a cell-free network security energy efficiency (SEE) scheme based on sub-connected active reconfigurable intelligent surface (RIS), where the multiple phase shifters share a power amplifier at RIS to achieve the purpose of reducing system energy consumption and saving costs. A joint base station (BS) and RIS beamforming optimizing problem of maximizing SEE is constructed, which includes the constraints of maximum transmission power, active RIS maximum power, phase shifter amplitude and amplification factor. Since the optimization problem is non-convex, the fractional programming method is used to decouple the objection function, and then the successive convex approximation, Alternating Direction Method of Multipliers, and Majorization-Minimization techniques are employed to alternately optimize to obtain the solutions of the original problem. Finally, simulation results demonstrate the effectiveness of the proposed scheme.

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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.