Nonlinear energy harvesting based cognitive relaying with best relay selection

IF 2.2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Physical Communication Pub Date : 2025-04-01 Epub Date: 2025-01-09 DOI:10.1016/j.phycom.2025.102603

Wen Si , Luyu Zhang , Chao Zhai , Lina Zheng , Jieyi Yan , Hongqiao Liu , Zijian Xu

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Abstract

This paper proposes a cognitive relaying scheme based on nonlinear energy harvesting, in which the licensed spectrum of the primary system is shared with the secondary system. The primary system comprises of an access point (AP) and multiple primary users (PUs). An energy-constrained secondary transmitter (ST), multiple secondary relays (SRs) and a secondary destination (SD) constitute the secondary system. ST uses the interference signal from AP to harvest energy. The transmit power of ST and relays should be strictly controlled to not exceed the interference constraint of all the PUs. The relay that has correctly decoded the ST’s data in the first-hop and brings the strongest signal power to the SD in the second-hop is selected to help ST transmit data to SD. Over the statistical properties of Rayleigh fading channels, we analyze the outage probability and throughput of the secondary system. We also present several benchmark systems for the performance comparison. Numerical results show that the protocol greatly improves spectrum efficiency and communication performance, and we emphasize the influence of various parameters on system performance.

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基于最佳继电器选择的非线性能量采集认知继电器

本文提出了一种基于非线性能量收集的认知中继方案，该方案将主系统的许可频谱与次系统共享。主系统由一个接入点（AP）和多个主用户（pu）组成。一个能量受限的二次发射机（ST）、多个二次中继（SRs）和一个二次目的地（SD）构成了二次系统。ST使用来自AP的干扰信号来收集能量。ST和继电器的发射功率应严格控制，不超过所有pu的干扰约束。选择在第一跳中正确解码ST的数据并在第二跳中给SD带来最强信号功率的中继来帮助ST向SD传输数据。根据瑞利衰落信道的统计特性，分析了二次系统的中断概率和吞吐量。我们还提出了几个用于性能比较的基准系统。数值结果表明，该协议极大地提高了频谱效率和通信性能，并着重讨论了各参数对系统性能的影响。

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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.