噪声光下的水下无线光通信理论与实验验证

Theoretical and Experimental Verification of Underwater Wireless Optical Communication under Noise Light

环境光噪声干扰下的水下无线光通信是水下无线光通信研究中的一个重要场景。提出了环境光噪声干扰条件下的水下无线光通信性能理论模型,搭建了环境光噪声干扰下的基于852 nm波长的水下无线光通信实验平台,并进行了实验验证。结果显示,实验结果与理论结果一致,证明使用滤光器可以有效地提升环境光噪声干扰下的水下无线光通信的通信性能和链路长度。实验中使用干涉滤光片可得到5.21 dB的Q因子增益。理论结果表明,在正交相移键控调制下通过使用干涉滤光片可使传输链路长度延长34.8%。理论分析模型可为环境光噪声影响下的多种通信波长多种调制格式的水下光通信链路的设计提供设计指导。

Underwater wireless optical communication under environmental noise light interference is an important scene in the research of underwater wireless optical communication.A performance theoretical model of underwater wireless optical communication under the interference of environmental noise light is proposed.An experimental platform of underwater wireless optical communication of 852 nm wavelength under environmental noise light interference is built to verify the performance of the model.The results show that the theoretical model results match well with the experimental results,and it proves that the communication performance and link range of underwater wireless optical communication can be effectively improved by employing filters under the interference of environmental noise light.The Q factor gain of 5.21 dB can be obtained through interference filter in experiment.The theoretical results show that the transmission link range can be extended by 34.8%with interference filter employed in quadrature phase shift keying modulation format.The theoretical analysis model can provide guidance on underwater wireless optical communication link under environmental noise light interference using different communication bands and modulation formats.