软件可定义的水下无线光通信系统设计与实现

Design and Implementation of a Software-Defined Underwater Wireless Optical Communication System

摘要:

随着水下无线光通信技术的持续发展，水下无线光通信系统的应用需求也日益增长。然而受限于水下环境的复杂多变性，现有系统在通用性与灵活性方面仍存在不足。故本文借鉴软件定义无线电的思想，基于GeekRF one硬件平台和GNU Radio软件框架，设计并实现了一种基于520nm激光的软件可定义的水下无线光通信系统。并进行了基于MPSK调制的水下无线光通信实验，本系统在BPSK的调制模式可实现通信速率为500Kbps的无误码传输；在QPSK的调制模式下可实现通信速率为1Mbps，误码率为1.728×10-5的信号传输。上述结果验证了所设计系统在不同调制方式下均具有优良的传输性能，进一步证明了其在水下通信环境中的可行性与灵活性。

Abstract:

With the continuous advancement of underwater wireless optical communication (UWOC) technology, the demand for practical UWOC applications has been steadily increasing. However, due to the complex and highly variable nature of the underwater environment, existing systems still suffer from limited generality and flexibility. To address these challenges, this paper draws inspiration from the concept of software-defined radio (SDR) and presents the design and implementation of a software-defined UWOC system employing a 520 nm laser, built on the GeekRF One hardware platform and the GNU Radio software framework. To validate the proposed system, UWOC experiments were conducted using M-ary phase-shift keying (MPSK) modulation. The system achieved error-free transmission at a data rate of 500 kbps in binary phase-shift keying (BPSK) modulation mode, and reached 1 Mbps with a bit error rate of 1.728×10?5 in the quadrature phase-shift keying (QPSK) modulation mode. These results demonstrate that the proposed system delivers excellent transmission performance across different modulation schemes and further confirm its feasibility and flexibility for underwater communication.