电子学报2023，Vol.51Issue(11)：3294-3304,11.DOI:10.12263/DZXB.20221160
GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析
Outage Analysis for Relay-Aided Underwater Wireless Optical Communication over GGD Weak Turbulence with Pointing Errors
摘要
Abstract
In order to overcome the shortcoming of the traditional underwater weak turbulence model that cannot ac-curately fit the measured data,the generalized gamma distribution(GGD)which has been verified by series of laboratory ex-periments is chosen to characterize the weak oceanic turbulence.Based on this,a new aggregated fading channel model is proposed,which takes into account the GGD weak turbulence,zero boresight pointing error,and the implicit path loss and multipath propagation effect characterized by fading free impulse response(FFIR).Next,a closed-form expression of the hybrid fading probability density function integrating the GGD weak turbulence and zero boresight pointing error is derived using the higher transcendental Meijer-G function,and then,the theoretical closed-form expressions for the outage probabil-ities of the parallel and serial relaying underwater wireless optical communication(UWOC)systems are derived according-ly.Finally,Monte Carlo simulations are provided to verify the correctness of the above-derived analytical formulas for the outage probability and to investigate the effect of different system core parameters on outage performance of the systems.The results show that the introduction of relay nodes can effectively reduce the outage risk of UWOC over long distances.In contrast,the number of relay nodes,receiver aperture size,incident optical beam jitter variance,and other parameters can affect the outage performance.In addition,the FFIR delay spread caused by increasing of the divergence angle of the light source will lead to serious inter-symbol interference,which will result in a general decrease of 1～3 orders of magnitude in the outage performance of the relaying UWOC systems.关键词
广义Gamma分布/弱海洋湍流/指向误差/中继/中断概率/水下无线光通信Key words
generalized gamma distribution/weak oceanic turbulence/pointing error/relay/outage probability/underwater wireless optical communication分类
信息技术与安全科学引用本文复制引用
张馨文,李岳衡,江雨薇,居美艳,黄平..GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析[J].电子学报,2023,51(11):3294-3304,11.基金项目
国家自然科学基金(No.61832005)National Natural Science Foundation of China(No.61832005) （No.61832005）
