Hybrid channel coding for OAM division multiplexing free space optical communication systems

被引：4
作者：
Cai, Shanyong [1 ,2 ]
Sheng, Wenbing [1 ,2 ]
Zhang, Zhiguo [1 ,2 ]
机构：
[1] Beijing Univ Posts & Telecommun BUPT, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] BUPT, Sch Elect Engn, Beijing 100876, Peoples R China
来源：
OPTICS EXPRESS | 2023年 / 31卷 / 19期
基金：
中国国家自然科学基金;
关键词：
PERFORMANCE ANALYSIS; FSO SYSTEM; TRANSMISSION;
D O I：
10.1364/OE.499516
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An orbital angular momentum division multiplexing free space optical communication (OAM-DM FSO) system with channel coding can compensate atmospheric channel fading and improve system performance. An OAM-DM FSO system based on hybrid channel coding is proposed in this paper. The coding gain is improved by taking into account mode dependent channel fading difference caused by atmospheric turbulence. Simulation results show that compared with single channel coding, the coding gain is increased by 1.85 dB under Cn2=1E-14, BER=1E-5 with non-uniform LDPC code (0.7 code rate) for an OAM1/OAM3 multiplexing system. In addition, for four OAM modes (+1,+3,+5,+7) multiplexing systems, the coding gain is increased by more than 3.8 dB under Cn2=1E-14 and BER=1E-5. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：30446 / 30457
页数：12
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