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arXiv 2203.15232cs.ITmath.IT
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多层水下信道无线光通信性能的统一评估

Unified Performance Assessment of Optical Wireless Communication over Multi-Layer Underwater Channels

Ziyaur Rahman, Neel Vipulbhai Tailor, S. M. Zafaruddin, V. K. Chaubey

摘要:

本文将多层垂直水下链路建模为级联信道,并统一使用广义Gamma(GG)、指数GG(EGG)、指数Weibull(EW)和Gamma-Gamma(ΓΓ)海洋湍流模型对水下光通信(UWOC)系统进行性能分析。本文推导了考虑独立和非全同(i.ni.d.)湍流模型和瞄准误差的零孔径瞄准模型。我们开发的性能指标考虑UWOC系统使用中断概率,平均比特出错率(BER),遍历容量与渐近表达式中断概率和平均BER。我们开发的建议系统的多样性顺序,以提供一个更好的洞察在高信噪比的系统性能。我们还集成了一个地面OWC(TOWC)的综合效应的广义马拉加大气湍流,雾引起的随机路径增益,和指向错误的UWOC链路使用固定增益放大转发(AF)中继通信。我们分析了混合TWOC和多层UWOC系统的性能,推导PDF,CDF,中断概率,平均误码率使用双变量福克斯H函数。我们使用蒙特卡罗模拟结果来验证我们的精确和渐近表达式,并证明了所考虑的水下UWOC系统使用基于测量的参数数据湍流海洋通道的性能。

英文摘要:

In this paper, we model the multi-layer vertical underwater link as a cascaded channel and unify the performance analysis for the underwater optical communication (UWOC) system using generalized Gamma (GG), exponential GG (EGG), exponentiated Weibull (EW), and Gamma-Gamma (ΓΓ) oceanic turbulence models. We derive unified analytical expressions for probability density function (PDF) and cumulative distribution function (CDF) for the signal-to-noise ratios (SNR) considering independent and non-identical (i.ni.d.) turbulent models and zero bore-sight model for pointing errors. We develop performance metrics of the considered UWOC system using outage probability, average bit error rate (BER), and ergodic capacity with asymptotic expressions for outage probability and average BER. We develop the diversity order of the proposed system to provide a better insight into the system performance at a high SNR. We also integrate a terrestrial OWC (TOWC) subjected to the combined effect of generalized Malaga atmospheric turbulence, fog-induced random path gain, and pointing errors to communicate with the UWOC link using the fixed-gain amplify-and-forward (AF) relaying. We analyze the performance of the mixed TWOC and multi-layer UWOC system by deriving PDF, CDF, outage probability, and average BER using the bivariate Fox H-function. We use Monte-Carlo simulation results to validate our exact and asymptotic expressions and demonstrate the performance of the considered underwater UWOC system using measurement-based parametric data available for turbulent oceanic channels.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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