水下无线光MIMO链路空间信道建模

doi:10.11959/j.issn.1000-0801.2023109

电信科学 ›› 2023, Vol. 39 ›› Issue (5): 48-56.doi: 10.11959/j.issn.1000-0801.2023109

水下无线光MIMO链路空间信道建模

刘晓谦¹, 唐昕柯², 董宇涵¹^,²

¹ 清华大学深圳国际研究生院，广东深圳 518055
² 鹏城实验室，广东深圳 518055

修回日期:2023-05-15 出版日期:2023-05-20 发布日期:2023-05-01
作者简介:刘晓谦（1999- ），男，清华大学深圳国际研究生院硕士生，主要研究方向为水下无线光通信和下一代短距无线通信技术
唐昕柯（1989- ），男，鹏城实验室副研究员，主要研究方向为无线光通信、量子密钥分发、光纤通信等
董宇涵（1979- ），男，清华大学深圳国际研究生院副教授、鹏城实验室副研究员，主要研究方向为无线通信与网络、无线光通信、机器学习与优化等
基金资助:
国家自然科学基金资助项目(62201303);广东省自然科学基金资助项目(2022A1515010209)

Spatial channel modeling for MIMO underwater wireless optical links

Xiaoqian LIU¹, Xinke TANG², Yuhan DONG¹^,²

¹ Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
² Peng Cheng Laboratory, Shenzhen 518055, China

Revised:2023-05-15 Online:2023-05-20 Published:2023-05-01
Supported by:
The National Natural Science Foundation of China(62201303);The GuangDong Basic and Applied Basic Research Foundation(2022A1515010209)

摘要/Abstract

摘要：

水下无线光通信（underwater wireless optical communication，UWOC）因具有高速率、低时延、高灵活性及可拓展性的特点而被广泛应用于水下通信组网的建设。然而，由于海水的吸收和散射效应，UWOC 链路的空间特性尚未得到广泛研究，尤其是在多输入多输出（multiple-input multiple-output，MIMO）场景中。考虑了线性阵列MIMO UWOC链路几何模型，提出使用加权指数函数多项式（weighted exponential function polynomial，WEFP）建模具有任意数量光源的通用MIMO UWOC系统链路接收平面的光子辐照度分布的方法。数值结果表明，提出的WEFP模型与浑浊海水环境下的蒙特卡洛仿真结果高度吻合。

关键词: 水下无线光通信, 多输入多输出, 辐照度, 蒙特卡洛仿真

Abstract:

Underwater wireless optical communication (UWOC) has been widely used in the construction of underwater communication network for the advantages of high data rates, small latency, high flexibility and scalability.However, due to the absorption and scattering effects of seawater, the spatial characteristics of UWOC links have not been studied extensively, especially in multiple-input multiple-output (MIMO) scenario.A linear array MIMO UWOC link geometry was considered and a weighted exponential function polynomial (WEFP) model was proposed to characterize the photon irradiance distribution at the receiving plane of general MIMO UWOC links with arbitrary numbers of light sources.Numerical results suggest that the proposed WEFP model fits well with the results of Monte Carlo simulations in turbid water environment.

Key words: underwater wireless optical communication, multiple-input multiple-output, irradiance, Monte Carlo simulation

中图分类号:

TP393

刘晓谦, 唐昕柯, 董宇涵. 水下无线光MIMO链路空间信道建模[J]. 电信科学, 2023, 39(5): 48-56.

Xiaoqian LIU, Xinke TANG, Yuhan DONG. Spatial channel modeling for MIMO underwater wireless optical links[J]. Telecommunications Science, 2023, 39(5): 48-56.

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水质	a/m^-1	b/m^-1	c/m^-1	g
沿岸水	0.179	0.219	0.398	0.947 0
港口水	0.295	1.875	2.170	0.919 9

水质	MIMO设置	链路距离/m	RMSE
港口水	2×2	5	4.736×10^-4
		10	1.982×10^-4
		15	1.288×10^-4
	4×4	5	6.024×10^-4
		10	5.120×10^-4
		15	1.990×10^-4
	6×6	5	5.805×10^-4
		10	2.789×10^-4
		15	1.654×10^-4
沿岸水	2×2	30	4.238×10^-4
		35	3.883×10^-4
		40	1.978×10^-4
	4×4	30	5.563×10^-4
		35	3.532×10^-4
		40	1.621×10^-4
	6×6	30	6.228×10^-4
		35	2.605×10^-4
		40	1.886×10^-4

水下无线光MIMO链路空间信道建模

Spatial channel modeling for MIMO underwater wireless optical links

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