水下 OWC 系统中采用索引调制的 OFDM 的智能索引识别

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-09-11 DOI:10.1109/LPT.2024.3458444

Xinyue Zhang;Zhihong Zeng;Pengfei Du;Bangjiang Lin;Chen Chen

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引用次数: 0

摘要

具有索引调制功能的正交频分复用（OFDM-IM）因其高功率效率和灵活性而成为水下光无线通信（UOWC）的理想方案。在这封信中，我们提出并通过实验演示了一种用于 UOWC 系统中 OFDM-IM 的智能索引识别方案。考虑到 OFDM-IM 独特的激活模式（每个子块内激活的子载波数量不同），我们采用频域信号直方图作为识别特征。此外，还进一步利用各种机器学习或深度学习算法作为工具，根据独特的频域直方图进行智能索引识别。实验结果证明了针对 UOWC 系统中的 OFDM-IM 所提出的智能索引识别方案的可行性。此外，还研究了分站数和符号数对索引识别性能的影响。

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Intelligent Index Recognition for OFDM With Index Modulation in Underwater OWC Systems

Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising scheme for underwater optical wireless communication (UOWC) due to its high power efficiency and flexibility. In this letter, we propose and experimentally demonstrate an intelligent index recognition scheme for OFDM-IM in UOWC systems. Considering the unique activation patterns of OFDM-IM with different numbers of activated subcarriers within each subblock, the signal histograms in the frequency domain are adopted as the features for recognition. Moreover, various machine learning or deep learning algorithms are further utilized as the tools to perform intelligent index recognition based on the distinctive frequency-domain histograms. Experimental results demonstrate the feasibility of the proposed intelligent index recognition scheme for OFDM-IM in UOWC systems. In addition, the impact of the number of bins and the number of symbols on the performance of index recognition is also studied.

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.