分层纵向水下无线光信道建模研究

Modeling of Hierarchical Vertical Underwater Wireless Optical Channel

摘要:

水下无线光通信（Underwater Wireless Optical Communication，UWOC）是水下物联网感知层的新兴技术之一。在感知层中，UWOC技术常被用于支持数据的纵向上行传输。本文针对几何光学理论无法准确描述UWOC链路衰减的问题，研究了基于MIE散射理论的纵向UWOC信道模型。本文提出了分层的纵向海水介质模型，在此基础上本文设计了一种利用蒙特卡洛仿真方法对UWOC纵向链路进行评估的方案。该方案考虑了收发装置空间位置的非对齐以及出现位置失配的情况。通过该方案可求得UWOC链路冲激响应的数值结果。研究成果对于UWOC设计具有重要意义。

Abstract:

Underwater Wireless Optical Communication (UWOC) is one of the emerging technologies for the underwater IoT sensing layer. In the sensing layer, UWOC technology is often used to support the vertical uplink transmission of data. This paper investigates a vertical UWOC channel model based on MIE scattering theory to address the problem that geometric optical theory cannot accurately describe the UWOC link fading. A hierarchical vertical seawater medium model is proposed in this paper, based on which this paper designs a scheme for evaluating UWOC vertical links using Monte Carlo simulation methods. The scheme considers the non-alignment of the spatial position of the transceiver and the occurrence of position mismatch. This scheme can obtain the numerical results of the impulse response of the UWOC link. The results of the study are of great significance for UWOC design.