基于BWSIDM的概率整形FSO传输（特邀）

赵伦; 刘天凯; 李依桐; 吴廷伟; 胡智力; 熊文瑞; 郭磊

doi:10.13756/j.gtxyj.2026.260047

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基于BWSIDM的概率整形FSO传输（特邀）

专题：面向6G的无线光通信 | 更新时间：2026-04-20

- 基于BWSIDM的概率整形FSO传输（特邀）
- Probability Shaping FSO Transmission based on BWSIDM
- 光通信研究 2026年第2期
- 作者机构：
  
  1.重庆邮电大学　通信与信息工程学院，重庆　400065
  2.喀什地区电子信息产业技术研究院，新疆　喀什　844000
  3.中国电子科技集团公司第五十四研究所　北京研发中心，北京　100043
  4.东北大学　计算机科学与工程学院，沈阳　110169
- 作者简介：
  
  赵伦（1987-），男，湖北孝感人。讲师，博士，主要研究方向为无线光通信。
  李依桐，高级工程师。E-mail：ytongm@163.com
- 基金信息：
  
  新疆维吾尔自治区自然科学基金资助项目(2024D01A16);国家自然科学基金资助项目(62025105;62301097)
- DOI：10.13756/j.gtxyj.2026.260047
  中图分类号： TN929
- 收稿：2026-02-10，
  
  修回：2026-02-28，
  
  纸质出版：2026-04-10
- 稿件说明：
移动端阅览
赵伦，刘天凯，李依桐，等. 基于BWSIDM的概率整形FSO传输[J]. 光通信研究，2026(2): 260047.

Zhao L, Liu T K, Li Y T, et al. Probability Shaping FSO Transmission based on BWSIDM[J]. Study on Optical Communications, 2026(2): 260047.
赵伦，刘天凯，李依桐，等. 基于BWSIDM的概率整形FSO传输[J]. 光通信研究，2026(2): 260047. DOI： 10.13756/j.gtxyj.2026.260047.

Zhao L, Liu T K, Li Y T, et al. Probability Shaping FSO Transmission based on BWSIDM[J]. Study on Optical Communications, 2026(2): 260047. DOI： 10.13756/j.gtxyj.2026.260047.

摘要

目的

针对传统基于比特加权分布匹配（BWDM）的概率整形（PS）方案虽可提升系统抗湍流性能，但存在标志比特错误的问题，文章提出了一种基于比特加权和同步反转分布匹配（BWSIDM）的PS 16阶正交振幅调制（QAM）自由空间光（FSO）传输方案。

方法

在发送端，采用3位标志比特标记比特分组的反转状态，并引入并行分组的同步反转机制以降低标志比特开销（OH）；在接收端，通过标志比特中的多数比特值确定分组的反转状态，从而降低标志比特传输错误的概率。

结果

在不同湍流强度、传输距离及信道衰减条件下，基于BWSIDM的PS方案性能均优于基于BWDM的PS方案。在背靠背（BTB）传输中，对于56 Gbit/s 16QAM信号，当误码率（BER）分别为10

-3

和10

-4

时，BWSIDM与BWDM方案相比，光信噪比（OSNR）分别提升了0.99和1.05 dB。在弱湍流条件下的FSO传输中，当BER分别为10

-4

和5×10

-5

时，BWSIDM与BWDM方案相比，传输距离分别提升了约59.4和76.1 m。

结论

基于BWSIDM的PS方案不仅具有更强的抗噪声性能，还能有效提升大气湍流环境下FSO通信系统的传输距离与抗衰减性能，具有良好的应用前景。

Abstract

Objective

To address the problem that the traditional Probabilistic Shaping (PS) scheme based on Bit-Weighted Distribution Matching (BWDM) is vulnerable to flag bit errors despite improving the anti-turbulence performance of the system

this paper proposes a probabilistically shaped 16 Quadrature Amplitude Modulatio (QAM) Free-Space Optical (FSO) transmission scheme based on Bit-Weighted and Synchronous Inversion Distribution Matching (BWSIDM).

Methods

At the transmitter

three flag bits are used to mark the inversion state of each bit group

and a synchronous inversion mechanism for parallel groups is introduced to reduce the Overhead (OH) of flag bits. At the receiver

the inversion state of each group is determined by the majority value of the flag bits

thereby reducing the probability of transmission errors in the flag bits.

Results

The performance of the PS scheme based on BWSIDM is superior to that based on BWDM under different turbulence intensities

transmission distances

and channel attenuations. For Back-to-Back (BTB) transmission of 56 Gbit/s 16QAM signals

the Optical Signal-to-Noise Ratio (OSNR) of the BWSIDM scheme is improved by 0.99 and 1.05 dB compared with the BWDM scheme at Bit Error Rate (BER) of 10

-3

and 10

-4

respectively. For FSO transmission under weak turbulence conditions

the transmission distance of the BWSIDM scheme is increased by approximately 59.4 and 76.1 m relative to the BWDM scheme at BER of 10

-4

and 5×10

-5

respectively.

Conclusion

The PS scheme based on BWSIDM not only has stronger anti-noise performance but also effectively improves the transmission distance and anti-attenuation performance of the FSO communication system in an atmospheric turbulence environment

demonstrating the application prospects.

关键词

Keywords

references

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