The BER performance of a FSO system with polar codes under weak turbulence

IF 2.3 4区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Optoelectronics Pub Date : 2021-09-16 DOI:10.1049/ote2.12058

Nithin Mohan, Zabih Ghassemlooy, Emma Li, Mojtaba Mansour Abadi, Stanislav Zvanovec, Ralph Hudson, Zun Htay

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引用次数: 1

Abstract

The key challenge in free space optical (FSO) communications is combating turbulence-induced fading. As the channel fading in FSO is quasi-static, the transmission parameters such as the code rates, transmit power and modulation schemes can be modified with respect to the channel state information transmitted via the feedback path. As a result, adaptive channel coding is considered as one of the practical approaches to improve the FSO link performance. In this study, the FSO system with polar codes is investigated and its performance is analysed by determining the optimum code-rate required to achieve a bit error rate of 10⁻⁹ under weak turbulence. It is shown that, using Monte-Carlo simulations for the scintillation indices of 0.12 and 0.2, the successive cancelation list (SCL) decoder offers coding gains of 2.5 and 0.3 dB, respectively, as compared with SC decoder, and for the scintillation index of 0.31, the SC decoder offers a coding gain of 2.5 dB compared to that of the SCL decoder for the code rate.

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弱湍流条件下极码FSO系统的误码率性能

自由空间光通信面临的主要挑战是对抗湍流引起的衰落。由于FSO中的信道衰落是准静态的，因此可以根据反馈路径传输的信道状态信息来修改编码速率、发射功率和调制方案等传输参数。因此，自适应信道编码被认为是提高FSO链路性能的实用方法之一。在本研究中，研究了具有极性编码的FSO系统，并通过确定在弱湍流下实现10−9误码率所需的最佳码率来分析其性能。结果表明，当闪烁指数为0.12和0.2时，SCL译码器的编码增益分别比SC译码器高2.5和0.3 dB;当闪烁指数为0.31时，SCL译码器的编码增益比SCL译码器高2.5 dB。

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来源期刊

Iet Optoelectronics 工程技术-电信学

CiteScore

4.50

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： IET Optoelectronics publishes state of the art research papers in the field of optoelectronics and photonics. The topics that are covered by the journal include optical and optoelectronic materials, nanophotonics, metamaterials and photonic crystals, light sources (e.g. LEDs, lasers and devices for lighting), optical modulation and multiplexing, optical fibres, cables and connectors, optical amplifiers, photodetectors and optical receivers, photonic integrated circuits, photonic systems, optical signal processing and holography and displays. Most of the papers published describe original research from universities and industrial and government laboratories. However correspondence suggesting review papers and tutorials is welcomed, as are suggestions for special issues. IET Optoelectronics covers but is not limited to the following topics: Optical and optoelectronic materials Light sources, including LEDs, lasers and devices for lighting Optical modulation and multiplexing Optical fibres, cables and connectors Optical amplifiers Photodetectors and optical receivers Photonic integrated circuits Nanophotonics and photonic crystals Optical signal processing Holography Displays