基于极化码的铅直水下可见光通信纠错编码  

Error-Correcting Coding for Vertical Underwater Visible Light Communication Based on Polar Codes

作　　者：林旭城 方俊彬[1,2] 陈哲 Lin Xucheng;Fang Junbin;Chen Zhe(Department of Optoelectronic Engineering,College of Science and Engineering,Jinan University,Guangzhou 510632,Guangdong,China;Guangdong Provincial Engineering Technology Research Center on Visible Light Communication,Guangzhou 510632,Guangdong,China)

机构地区：[1]暨南大学理工学院光电工程系,广东广州510632 [2]广东省可见光通信工程技术研究中心,广东广州510632

出　　处：《激光与光电子学进展》2022年第21期60-68,共9页Laser & Optoelectronics Progress

摘　　要：基于发光二极管的水下可见光通信技术是一种照明通信两用的水下无线通信方式,有效解决了水声通信时延大、带宽小、能耗大等诸多缺点。由于海水中各种介质对光的传播造成衰减,降低了接收信噪比,影响通信质量。同时,海水铅直方向介质质量浓度随深度增加而变化,导致光传播吸收和散射系数不是恒定的,影响到纠错编码的参数设置。本文在Matlab平台上使用蒙特卡罗法对海水信道进行了建模仿真,并根据仿真信噪比设计并提出了一种基于极化码的纠错编码方案,以调整编码参数,保证不同信道环境下数据传输的可靠性。仿真结果表明,对于不同的接收信噪比,所提方案都能够调节编码码率以实现无误码传输。因此,所提方案能够根据实际的信道环境来调整编码参数,保证了通信过程的可靠性。Underwater visible light communication(UVLC)technology based on a lightemitting diode is a type of underwater wireless communication approach that simultaneously realizes the functions of illumination and communication.UVLC can effectively solve many disadvantages of underwater acoustic communication,such as large delay,small bandwidth,and high energy consumption.However,it reduces the signaltonoise ratio(SNR)of the receiving plane due to the attenuation of light propagation caused via various media in seawater,degrading the communication quality of the system.Additionally,the concentration of the underwater medium changes as the depth varies,causing the change in the light propagation absorption and scattering coefficient,which affects the parameter setting of the errorcorrecting coding.In this paper,we use the Monte Carlo approach to implement vertical UVLC channel modeling by operating on the Matlab simulation platform to obtain SNR that contributes to the design of an errorcorrecting coding scheme based on the polar codes,ensuring that the data transmission is reliable at different channel conditions by adjusting coding parameters.The simulation result shows that the proposed scheme can achieve errorfree transmission at different SNRs by adjusting the code rate.Therefore,the proposed scheme can ensure the reliability of the UVLC system by adjusting the coding parameters obtained from the actual channel environment.

关 键 词：大气光学与海洋光学 水下可见光通信 信道建模 蒙特卡罗法 极化码 纠错编码 

分 类 号：TN929.[电子电信—通信与信息系统]