水下湍流对轨道角动量通信系统信道容量的影响

J4 ›› 2018, Vol. 35 ›› Issue (4): 499-506.

水下湍流对轨道角动量通信系统信道容量的影响

胡涛,潘孙翔,王乐,赵生妹

1南京邮电大学信号处理与传输研究院，江苏南京 210003; 2 南京邮电大学宽带无线通信与传感网技术教育部重点实验室，江苏南京 210003

收稿日期:2017-05-17 修回日期:2017-05-27 出版日期:2018-07-28 发布日期:2018-07-12
通讯作者: 赵生妹（1968-），女，教授，博士生导师，主要研究方向为无线网络中信号处理、量子信息处理。 E-mail:zhaosm@njupt.edu.cn
作者简介:胡涛（1995-）,研究生，研究方向为量子信息处理。Email: Q13010421@njupt.edu.cn
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金，61475075, 61271238), Open Research Fund of Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education(教育部“宽带无线通信与传感网技术”重点实验室开放课题，NYKL2015011)

Influence of underwater turbulence on channel capacity of orbital angular momentum communication system

HU Tao, PAN Sunxiang, WANG Le, ZHAO Shengmei

1 Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; 2 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2017-05-17 Revised:2017-05-27 Published:2018-07-28 Online:2018-07-12

摘要/Abstract

摘要：

研究了水下湍流对轨道角动量（OAM）通信系统的性能影响，分析了不同环境参数和传输距离下OAM通信系统信道容量的变化。结果表明，水下湍流环境中随着传输距离、湍流动能耗散率和温度耗散率的增加，OAM态光束模式之间串扰加强，信道容量下降。当传输距离达到7 m左右，信道容量下降为原来的一半；当湍流动能耗散率为，容量下降到理论最大值的75%；当温度耗散率为，信道容量下降到理论上最大值的一半；水下环境中盐度扰动比温度变化扰动对OAM通信系统性能的影响更大。

关键词: 光通信；轨道角动量态；水下湍流；拉盖尔-高斯光束；信道容量

Abstract:

Influences of underwater turbulence on the performance of orbital angular momentum (OAM) communication system are investigated. The changes of OAM communication system capacity with different environment parameters and transmission distances are presented. Results show that in underwater turbulence environment, the crosstalk between OAM beam modes is enhanced and channel capacity decreases with the increasing of transmission distance, dissipation rates of turbulent flow and temperature. When the transmission distance approaches 7 m, the channel capacity decreases to half of the original one. When the turbulence kinetic energy dissipation is close to , the capacity decreases to 75% of the theoretical maximum. When the temperature dissipation rate is , the channel capacity reduces to half of the theoretical maximum. In underwater environment, salinity disturbance has a greater influence on the capacity performance than that of temperature disturbance.

Key words: optical communications; orbital angular momentum; underwater turbulence; Laguerre-Gaussian beam; channel capacity

中图分类号:

胡涛潘孙翔王乐赵生妹. 水下湍流对轨道角动量通信系统信道容量的影响[J]. J4, 2018, 35(4): 499-506.

HU Tao, PAN Sunxiang, WANG Le, ZHAO Shengmei. Influence of underwater turbulence on channel capacity of orbital angular momentum communication system[J]. J4, 2018, 35(4): 499-506.

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