基于波前相位校正的OAM-SK FSO通信系统误码率性能研究

doi:10.11959/j.issn.1000-436x.2022110

通信学报 ›› 2022, Vol. 43 ›› Issue (5): 14-23.doi: 10.11959/j.issn.1000-436x.2022110

基于波前相位校正的OAM-SK FSO通信系统误码率性能研究

李爽, 王平, 刘涛, 潘宇婷, 王炜

西安电子科技大学通信工程学院综合业务网国家重点实验室，陕西西安 710071

修回日期:2022-04-26 出版日期:2022-05-25 发布日期:2022-05-01
作者简介:李爽（1997- ），女，陕西商洛人，西安电子科技大学博士生，主要研究方向为涡旋光通信、水下无线光通信
王平（1977- ），男，陕西西安人，博士，西安电子科技大学教授、博士生导师，主要研究方向为无线光通信、可见光通信以及人工智能通信等
刘涛（1986- ），男，陕西西安人，西安电子科技大学博士生，主要研究方向为无线光通信
潘宇婷（1996- ），女，浙江台州人，西安电子科技大学硕士生，主要研究方向为涡旋光通信
王炜（1996- ），女，山西临汾人，西安电子科技大学博士生，主要研究方向为水下无线光通信、深度学习、涡旋光通信
基金资助:
国家自然科学基金资助项目(62071365);陕西省重点研发计划基金资助项目(2022GY-103)

Research on BER performance of the OAM-SK FSO communication system with wavefront phase correction

Shuang LI, Ping WANG, Tao LIU, Yuting PAN, Wei WANG

State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi’an 710071, China

Revised:2022-04-26 Online:2022-05-25 Published:2022-05-01
Supported by:
The National Natural Science Foundation of China(62071365);The Key Research and Development Program of Shaanxi Province(2022GY-103)

摘要/Abstract

摘要：

弱大气湍流条件下，针对轨道角动量键控自由空间光通信系统，基于Gerchberg-Saxton算法和角谱理论，提出了一种改进的Laguerre-Gaussian光束波前相位校正算法。该算法将传输前后探测光束的光场分布作为输入，利用迭代计算得到的相位掩膜校正畸变的传输光束，从而减缓大气湍流引起的模间串扰效应。仿真结果表明，改进的波前相位校正算法明显优于传统的GS算法，且随着折射率结构参数的增加，系统的误码率性能得到显著提升。

关键词: 自由空间光通信, 轨道角动量, 相位校正, 角谱理论, 误码率

Abstract:

On the basis of Gerchberg-Saxton (GS) algorithm and angular-spectrum theory, an improved wavefront phase correction algorithm to the Laguerre-Gaussian (LG) beams was proposed for the orbital angular momentum-shift keying (OAM-SK) modulation-based free space optical (FSO) communication system under weak atmospheric turbulence.The light field distributions of the probe beam at transmitter and receiver were regarded as the input of the improved wavefront phase correction algorithm.And the correction phase mask was iteratively calculated to correct the distorted LG beams, thereby alleviating the inter-model crosstalk caused by atmospheric turbulence.Simulation results show that the improved wavefront phase correction algorithm is superior to the conditional GS algorithm.And with the increase of the refractive-index structure parameter, the bit error rate (BER) performance of the OAM-SK FSO communication system is significantly improved.

Key words: free space optical, orbital angular momentum, phase correction, angular-spectrum theory, bit error rate

中图分类号:

TN929.12

李爽, 王平, 刘涛, 潘宇婷, 王炜. 基于波前相位校正的OAM-SK FSO通信系统误码率性能研究[J]. 通信学报, 2022, 43(5): 14-23.

Shuang LI, Ping WANG, Tao LIU, Yuting PAN, Wei WANG. Research on BER performance of the OAM-SK FSO communication system with wavefront phase correction[J]. Journal on Communications, 2022, 43(5): 14-23.

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参数	含义/单位	值
λ	波长/nm	1 550
L₀	外尺度/m	20
l₀	内尺度/m	0.01
ω₀	束腰半径/m	0.016
z	传输距离/m	1 000
L_p	采样范围边长/m	0.3

基于波前相位校正的OAM-SK FSO通信系统误码率性能研究

Research on BER performance of the OAM-SK FSO communication system with wavefront phase correction

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