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基于波前整形和自适应光学的水下可见光通信系统

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为了解决水下可见光通信中复杂的水下湍流、散射环境对光束造成的畸变而导致信号传输失败的问题,使用随机相位屏方法模拟了水下湍流信道,在发射端对光束进行波前整形实现远距离聚焦,接收端使用 自适应相位恢复算法对接收端光斑进行恢复.在1.2 m水下实验平台使用比特功率加载技术发射离散多音信号(discrete multi-tone,DMT)信号测量接收光功率与数据传输速率的对应关系,基于此,预测了 100 m湍流环境下可见光信号的传输速率,与经过波前整形以及自适应相位恢复后的结果对比得到,所提出的方法可以使得水下可见光系统的传输速率得到极大提升.
Underwater visible light communication system based on wavefront shaping and adaptive optics
To address the issue of signal transmission failure induced by beam distortion due to complex underwater turbu-lence and scattering environments in underwater visible light communication,this study employs a random phase screen method to simulate the underwater turbulence channel.Furthermore,wavefront shaping techniques are implemented at the transmitter end to facilitate long-distance focusing,while utilizing an adaptive phase recovery algorithm at the receiver end to regenerate the light spot.Discrete Multi-tone(DMT)signals are transmitted using bit-power loading technology on a 1.2 m underwater experimental platform,enabling the measurement of the correlation between received light power and data transmission rate.Based on these findings,the transmission rate of visible light signals in a 100 m turbulent environment is predicted.When compared to the results of wavefront shaping and adaptive phase recovery,the proposed approach signifi-cantly enhances the transmission rate of underwater visible light systems.

underwater visible light communicationwavefront shapingrandom phase plateturbulent flowadaptive optics

陈超旭、徐迟、施剑阳、迟楠

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复旦大学电磁波信息科学教育部重点实验室,上海 200433

水下可见光通信 波前整形 随机相位屏 湍流 自适应光学

国家重点研发计划国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目鹏城实验室重点项目中国博士后科学基金项目博士后创新人才支持计划

2022YFB28028036192510462031011622011572021M700025BX2021082

2024

10.3979/j.issn.1673-825X.202308110271

重庆邮电大学学报(自然科学版)
重庆邮电大学

重庆邮电大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.66
ISSN：1673-825X
年,卷(期)：2024.36(1)
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