Hybrid FSO/RF and UWOC system for enabling terrestrial–underwater communication: Performance analysis

IF 2 4区 计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Physical Communication Pub Date : 2024-11-13 DOI:10.1016/j.phycom.2024.102540
Neha Payal, Devendra Singh Gurjar
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Abstract

This work examines the performance of the terrestrial–underwater communication system utilizing hybrid free space optics (FSO)/radio-frequency (RF) and underwater wireless optical communication (UWOC) links. Here, the base station communicates with the underwater vehicle via a decode-and-forward (DF) based relay (buoy) in two phases. In the first phase, a hybrid FSO/RF link is used to transmit signal to the buoy, where the RF link acts as an alternative link to increase the reliability of the system, and in the next phase, the buoy forwards signal to the underwater vehicle through the UWOC link. To enhance the reliability of the RF link, the buoy is deployed with multiple antennas, and it exploits a maximal ratio combining scheme on the received RF signals. The analysis takes into consideration some primary variables that influence the system’s performance, such as atmospheric turbulence, attenuation, temperature gradient, air bubbles, water salinity variations, pointing errors, and detection techniques. Closed-form expressions for the outage probability, system throughput, and average channel capacity in terms of the Meijer-G and bivariate Fox-H functions are derived. Simulation results are presented to validate the analytical expressions and disclose valuable findings.
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实现陆地与水下通信的 FSO/RF 和 UWOC 混合系统:性能分析
这项研究考察了利用混合自由空间光学(FSO)/射频(RF)和水下无线光通信(UWOC)链路的陆地-水下通信系统的性能。在这里,基站通过一个基于解码和前向(DF)的中继器(浮标)分两个阶段与水下航行器通信。在第一阶段,使用 FSO/RF 混合链路向浮标传输信号,其中 RF 链路作为替代链路以提高系统的可靠性;在下一阶段,浮标通过 UWOC 链路向水下航行器转发信号。为了提高射频链路的可靠性,浮标上部署了多个天线,并对接收到的射频信号采用最大比值组合方案。分析考虑了影响系统性能的一些主要变量,如大气湍流、衰减、温度梯度、气泡、水盐度变化、指向误差和探测技术。根据 Meijer-G 和双变量 Fox-H 函数,得出了中断概率、系统吞吐量和平均信道容量的闭式表达式。仿真结果验证了分析表达式,并揭示了有价值的发现。
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来源期刊
Physical Communication
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.
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