Entropy Loading Design for the MIMO-OFDM Visible Light Communication System Using the OCT Precoding Technique

Guo, Xinyue and Zhao, Haimeng and Wang, Wei (2020) Entropy Loading Design for the MIMO-OFDM Visible Light Communication System Using the OCT Precoding Technique. Advances in Condensed Matter Physics, 2020. pp. 1-7. ISSN 1687-8108

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Abstract

In this paper, an orthogonal circulant matrix transform (OCT) precoding technique is proposed to combine with the entropy loading in the multiple-input multiple-output and orthogonal frequency division multiplexing (MIMO-OFDM) visible light communication (VLC) system where the space-time coding (STBC) is chosen for its robustness to the channel correlation. Benefitting from the OCT precoding technique, the uniform signal-to-noise ratio (SNR) among all the subchannels can be achieved. As a result, only one SNR value is required to be fed back, and the same distribution matcher is employed during probabilistic shaping (PS), which means much lower feedback overhead and system complexity than the conventional entropy loading scheme. Experimental results show that the OCT precoding does not cause the system performance loss where the achievable information rate (AIR) of the proposed system is comparable with the conventional system without precoding. With an available bandwidth of ∼25 MHz, the proposed scheme can realize the AIR of 50.75 Mb/s at the expense of 0.45% average forward error correction (FEC) overhead (OH).

Item Type: Article
Subjects: Euro Archives > Physics and Astronomy
Depositing User: Managing Editor
Date Deposited: 04 Feb 2023 04:16
Last Modified: 22 Jun 2024 07:54
URI: http://publish7promo.com/id/eprint/637

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