一种近程水下声光一体化高速通信系统

A High-data-rate communication scheme of short-range underwater Optical-Acoustic integration

摘要:

水下光通信具有高数据速率、低链路延迟等优势，但水体浑浊、对准困难等原因限制了其应用，声通信则因具有互补性可被用于组成声、光混合通信系统。但考虑到声、光信号不同传播特性，常规上此类声、光混合通信系统均采用声、光用独立调制、解调的方式实现，造成较高的硬件系统开销。本文提出了近程水下声光一体化高速通信方案，该方案采用PPM调制方式，基于同一套调制、解调模块以一体化的方式支持声、光两种通信链路，通过声、光两种通信模式的一体化实现，以更低的系统硬件实现复杂度提供具有更好的指向特性、水质、环境噪声适应性的近距高速链路。经水池实验验证：本文系统在近程通信时，声、光通信链路均可实现1Mbps数据速率的无误码通信。

Abstract:

Underwater optical communication has advantages such as high data rate and low link delay, however, it is limited by turbidity of water and difficulty in alignment. Acoustic communication can be used to form a hybrid acoustic and optical communication system due to its complementarity. However, this kind of system uses independent modulation and demodulation to realize sound and light, which requires high hardware cost. In this paper, a high-speed communication scheme of short-range underwater Optical-Acoustic integration is proposed. The scheme adopts the same 16-PPM modulation mode and supports acoustic and optical communication links in an integrated way based on the same set of modulation and demodulation modules. It is realized through the integration of acoustic and optical communication modes. With lower system hardware complexity to provide a short range high-speed link with better pointing characteristics, water quality, environmental noise adaptability. The pool experiment verifies that the system in this paper can realize error-free communication at 1Mbps data rate in short-range communication, both acoustic and optical communication links