高速列车接入连接的ris辅助FSO通信系统信道容量增强

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

Physical Communication Pub Date : 2025-06-11 DOI:10.1016/j.phycom.2025.102723

Abhishek Kumar , Kehariom Dewangan , Prabu Krishnan

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引用次数: 0

摘要

高速列车（HST）系统的使用率和技术进步，以及对不间断和可靠的互联网连接的要求，使得在高速列车（HST）上提供宽带互联网服务变得必不可少。自由空间光通信（FSOC）是一种很有前途的技术，为hst提供宽带互联网接入。人们正在探索可重构智能表面（RISs）等技术创新，以提高FSOC系统的性能。本研究提出一种基于最优速率自适应（ORA）的ris辅助FSOC系统。我们研究了ris辅助和直接FSO通道在中等到强湍流条件下的统计特性，有和没有指向误差。考虑到上述衰落条件，我们随后使用ORA技术制定了系统的平均信噪比和平均信道容量。结果表明，在500 m链路长度下，ris辅助FSOC系统在24 dB平均信噪比下实现了4比特/秒/Hz的平均频谱效率（ASE）。

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Channel capacity enhancement of RIS-assisted FSO communication system for high-speed trains access connectivity

The rising utilization and technological progress of high-speed train (HST) systems, combined with the requirement for uninterrupted and dependable internet connectivity, have made it essential to provide broadband internet services onboard HSTs. Free space optics communication (FSOC) is a promising technology for providing broadband Internet access to HSTs. Technological innovations such as reconfigurable intelligent surfaces (RISs) are being explored to enhance the performance of FSOC systems. This study proposes an Optimal Rate Adaptation (ORA)-based RIS-assisted FSOC system. We investigated the statistical properties of RIS-assisted and direct FSO channels under moderate to strong turbulence conditions with and without pointing errors. Considering the aforementioned fading conditions, we subsequently formulated the average signal-to-noise ratio and the average channel capacity of the system using the ORA technique. The results show that the proposed RIS-assisted FSOC system achieves an average spectral efficiency (ASE) of 4 bits/sec/Hz at 24 dB average SNR for a 500 m link length.

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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.