Real-time implementation of selection combining algorithm for mode diversity free space coherent optical receipt

Longyan Zhang; Caixiao Ouyang; Yan Li; Jingwei Song; Xinpei Tang; KeJia Xu; Jifang Qiu; Xiaobin Hong; Yong Zuo; Jian Wu

doi:10.1117/12.3023759

18 March 2024 Real-time implementation of selection combining algorithm for mode diversity free space coherent optical receipt

Longyan Zhang, Caixiao Ouyang, Yan Li, Jingwei Song, Xinpei Tang, KeJia Xu, Jifang Qiu, Xiaobin Hong, Yong Zuo, Jian Wu

Author Affiliations +

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131046A (2024) https://doi.org/10.1117/12.3023759
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

Atmospheric turbulence is a crucial factor affecting the performance of space optical communication systems. The mode diversity is considered an effective turbulence compensation method. In the mode diversity system, coherent combining algorithms are needed to combine the received signals from multiple modes to counteract the effects of turbulence. In this paper, we investigate the performance of 3 mode diversity coherent combining based on the selection combining (SC) algorithm in a 2.5 GBaud QPSK real-time back-to-back transmission system. We simulate turbulence with dynamic changes and calculate the bit error rate (BER) periodically. The experimental results show that within 1 second, the SC algorithm can reduce the frame error rate (FER) by 45% compared to using only single mode reception.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Longyan Zhang, Caixiao Ouyang, Yan Li, Jingwei Song, Xinpei Tang, KeJia Xu, Jifang Qiu, Xiaobin Hong, Yong Zuo, and Jian Wu "Real-time implementation of selection combining algorithm for mode diversity free space coherent optical receipt", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131046A (18 March 2024); https://doi.org/10.1117/12.3023759

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