电子学报 ›› 2022, Vol. 50 ›› Issue (1): 18-25.DOI: 10.12263/DZXB.20210359

• 无线光通信及其组网技术 • 上一篇    下一篇

交叉相关双路分集OAM湍流光信道接收信号模拟研究

熊琴琴1,2, 陈纯毅1,2, 于海洋1,2, 姚海峰1, 宋佳雪1,2, 娄岩1   

  1. 1.长春理工大学空地激光通信技术国防重点学科实验室,吉林 长春 130022
    2.长春理工大学计算机科学技术学院,吉林 长春 130022
  • 收稿日期:2021-03-01 修回日期:2021-07-24 出版日期:2022-01-25
    • 作者简介:
    • 熊琴琴 女,1996年出生,重庆人.硕士.毕业于长春理工大学,主要研究方向为空间激光通信.
      陈纯毅(通信作者) 男,1981年出生,重庆人.博士.现为长春理工大学教授、博士生导师,主要研究方向为光传输建模与仿真. E-mail:chenchunyi@hotmail.com
      于海洋 男,1989年出生,吉林长春人.博士.现为长春理工大学讲师,主要研究方向为机器学习理论与应用.
      姚海峰 男,1990出生,安徽池州人.博士.毕业于长春理工大学,主要研究方向为自由空间通信、大气光信道特性以及信息安全.
      宋佳雪 女,1996出生,黑龙江鹤岗人.硕士.毕业于长春理工大学,主要研究方向为无线激光通信.
      娄 岩 女,1981出生,吉林长春人.博士.现为长春理工大学研究员,主要研究方向为空间激光通信系统仿真.
    • 基金资助:
    • 国家自然科学基金 (61775022); 吉林省科技发展计划 (YDZJ202101ZYTS151C)

Study on Simulation of Two Cross-Correlated Received Signals in Turbulent OAM Optical Diversity Channels

XIONG Qin-qin1,2, CHEN Chun-yi1,2, YU Hai-yang1,2, YAO Hai-feng1, SONG Jia-xue1,2, LOU Yan1   

  1. 1.Key Laboratory for Defense Discipline of Space-to-Ground Laser Communication Technology, Changchun University of Science and;Technology, Changchun, Jilin 130022, China
    2.School of Computer Science and Technology, Changchun University of Science and Technology, Changchun, Jilin 130022, China
  • Received:2021-03-01 Revised:2021-07-24 Online:2022-01-25 Published:2022-01-25
    • Supported by:
    • National Natural Science Foundation of China (61775022); Science and Technology Development Project of Jilin Province (YDZJ202101ZYTS151C)

摘要:

为了用蒙特卡洛方法评估空间分集轨道角动量(Orbital Angular Momentum,OAM)光通信系统性能,提出模拟生成无限长交叉相关双路分集OAM信道接收光信号的方法.根据推广的稀疏谱模型,生成双路交叉相关高斯随机样本序列;然后通过逆变换将上述生成的相关高斯随机样本序列映射为服从双Johnson SB分布的随机样本序列.通过模拟实验发现,该方法生成的双路信号样本序列的统计分布与双Johnson SB分布能很好地吻合,并且每路信号的自相关和双路信号之间的交叉相关均与所需目标值一致.该结果表明,提出的方法能够用于模拟受大气湍流扰动的空间分集OAM信道接收光信号.

关键词: 轨道角动量光通信, 空间分集, 湍流扰动光信号, 自相关, 交叉相关

Abstract:

Aiming at evaluating the performance of orbital angular momentum(OAM) optical communication systems with spatial diversity by Monte Carlo methods, we propose a method to simulate two cross-correlated received optical signals with infinite duration in OAM diversity channels. Two cross-correlated Gaussian random sample sequences are generated by use of generalized sparse spectrum model; subsequently, the Gaussian sequences are mapped into random sample sequences obeying the dual Johnson SB distribution by the inverse transformation. It is found from simulation experiments that the statistical distribution of the two simulated signal sample sequences is in excellent agreement with the dual Johnson SB distribution; meanwhile, the auto-correlation of each sequence and the cross-correlation between the two sequences are well consistent with the target value. The experimental results verify that the proposed method can be used to simulate the received optical signals in OAM spatial diversity channels distorted by atmospheric turbulence.

Key words: orbital angular momentum optical communication, spatial diversity, turbulence-distorted optical signals, auto-correlation, cross-correlation

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