量子电子学报 ›› 2021, Vol. 38 ›› Issue (6): 880-888.doi: 10.3969/j.issn.1007-5461.2021.06.017

• 光通信 • 上一篇    

抑制多用户干扰的串行反馈干扰抑制算法研究

苏国瑞1 , 林浩坤2 , 蒲 涛1∗ , 郑吉林1 , 谭业腾1 , 牟卫峰3   

  1. 1 陆军工程大学通信工程学院, 江苏 南京 210007; 2 华中科技大学软件学院, 湖北 武汉 430070; 3 国防科技大学信息与通信学院, 湖北 武汉 430010
  • 收稿日期:2020-08-07 修回日期:2020-10-19 出版日期:2021-11-28 发布日期:2021-11-28
  • 通讯作者: E-mail: nj−putao@163.com E-mail:E-mail: nj−putao@163.com
  • 作者简介:苏国瑞 ( 1991 - ), 山东济南人, 博士生, 主要从事光通信技术, OCDMA 系统和光隐藏通信系统方面的研究。 E-mail: sgr0521@163.com
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金, 61475193, 61177065, 61174199)

Serial feedback interference suppression algorithm for multi-user interference suppression

SU Guorui 1 , LIN Haokun 2 , PU Tao 1∗ , ZHENG Jilin 1 , TAN Yeteng 1 , MOU Weifeng 3   

  1. 1 College of Communications Engineering, Army Engineering University of PLA, Nanjing 210007, China; 2 School of Software Engineering, Huazhong University of Science and Technology, Wuhan 430070, China; 3 College of Information and Communication, National University of Defense Technology, Wuhan 430010, China
  • Received:2020-08-07 Revised:2020-10-19 Published:2021-11-28 Online:2021-11-28

摘要: 在多用户光码分多址 (OCDMA) 传输系统中, 多用户干扰 (MAI) 严重影响系统传输性能。针对系统中 多用户干扰来源于各用户码字不完全正交的特点, 采用码字的自、互相关函数表达接收信号与系统损伤, 引入 将多用户干扰看作可重构的 “有效信息” 的新思路, 提出了一种基于数字信号处理技术的串行反馈干扰抑制 算法。搭建了 2 用户同步接入频谱幅度编码光码分多址 (SAC-OCDMA) 传输系统仿真平台, 验证了该算法抑制 多用户干扰的有效性。仿真结果表明: 相较于光阈值器件, 采用串行反馈干扰抑制算法抑制多用户干扰的效果 更好, 系统传输性能的改善更大, 引入的功率代价仅为 2.3 dB。

关键词: 光通信, 光码分多址系统, 多用户干扰, 串行反馈干扰抑制算法

Abstract: In the multi-user optical code division multiple access (OCDMA) transmission system, multi-user interference (MAI) seriously affects the transmission performance of the system. In view of the fact that the multi-user interference comes from the incomplete orthogonality of codewords, the received signal and the system damage can be expressed by the autocorrelation and the crosscorrelation functions of codewords. A new research idea regarding the multi-user interference as the effective information that can be reconstructed is introduced to suppress the multi-user interference, and a serial feedback interference suppression algorithm based on the digital signal processing technology is proposed. A simulation platform for two users synchronous access spectrum amplitude code optical code division multiple access (SAC-OCDMA) transmission system is built to verify the effectiveness of the algorithm in suppressing the multi-user interference. The simulation results show that compared with the optical threshold device, the serial feedback interference suppression algorithm can suppress the multi-user interference better, the improvement of the system transmission performance is greater, while the power penalty introduced is only 2.3 dB.

Key words: optical communication, optical code division multiple access, multi-user interference, serial feedback interference suppression algorithm

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