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Performance-enhanced gigabit/s MIMO-OFDM visible light communications using CSI-free/dependent precoding techniques

Performance-enhanced gigabit/s MIMO-OFDM visible light communications using CSI-free/dependent precoding techniques
Performance-enhanced gigabit/s MIMO-OFDM visible light communications using CSI-free/dependent precoding techniques

In this paper, we propose two digital signal processing (DSP) techniques, the orthogonal circulant matrix transform (OCT) technique and the singular value decomposition (SVD)-based adaptive loading, to reduce the bit error rate (BER) of multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM)-based visible light communication (VLC) systems, without and with using the channel state information (CSI), respectively. A gigabit/s 2 × 2 MIMO-OFDM VLC system under ~100-MHz system bandwidth, with both symmetrical and asymmetrical MIMO setups, is demonstrated. It is shown that both techniques can attain outstanding BER reduction regardless of the transceivers’ geometrical distributions. The SVD-based adaptive loading exhibits the best performance but requires the CSI. The OCT technique can achieve suboptimal performance without the needs of CSI. In both the 1.6-Gbit/s symmetrical MIMO setup and the 1.2-Gbit/s asymmetrical setup, we achieved more than one and two orders of magnitude reductions in the BER by using the OCT technique and the SVD-based adaptive loading, respectively.

1094-4087
12806-12816
Hong, Yang
73d5144c-02db-4977-b517-0d2f5a052807
Chen, Lian Kuan
4b088e27-3c85-44c7-9203-3e9c7d423558
Zhao, Jian
5ef19b9f-bc56-4bfd-97ae-fdaa7327f14e
Hong, Yang
73d5144c-02db-4977-b517-0d2f5a052807
Chen, Lian Kuan
4b088e27-3c85-44c7-9203-3e9c7d423558
Zhao, Jian
5ef19b9f-bc56-4bfd-97ae-fdaa7327f14e

Hong, Yang, Chen, Lian Kuan and Zhao, Jian (2019) Performance-enhanced gigabit/s MIMO-OFDM visible light communications using CSI-free/dependent precoding techniques. Optics Express, 27 (9), 12806-12816. (doi:10.1364/OE.27.012806).

Record type: Article

Abstract

In this paper, we propose two digital signal processing (DSP) techniques, the orthogonal circulant matrix transform (OCT) technique and the singular value decomposition (SVD)-based adaptive loading, to reduce the bit error rate (BER) of multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM)-based visible light communication (VLC) systems, without and with using the channel state information (CSI), respectively. A gigabit/s 2 × 2 MIMO-OFDM VLC system under ~100-MHz system bandwidth, with both symmetrical and asymmetrical MIMO setups, is demonstrated. It is shown that both techniques can attain outstanding BER reduction regardless of the transceivers’ geometrical distributions. The SVD-based adaptive loading exhibits the best performance but requires the CSI. The OCT technique can achieve suboptimal performance without the needs of CSI. In both the 1.6-Gbit/s symmetrical MIMO setup and the 1.2-Gbit/s asymmetrical setup, we achieved more than one and two orders of magnitude reductions in the BER by using the OCT technique and the SVD-based adaptive loading, respectively.

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Accepted/In Press date: 7 April 2019
e-pub ahead of print date: 22 April 2019
Published date: 29 April 2019

Identifiers

Local EPrints ID: 430718
URI: https://eprints.soton.ac.uk/id/eprint/430718
ISSN: 1094-4087
PURE UUID: dcc399b1-b7af-47fe-965d-a88bb98d7d6d

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Date deposited: 09 May 2019 16:30
Last modified: 09 Dec 2019 17:37

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Contributors

Author: Yang Hong
Author: Lian Kuan Chen
Author: Jian Zhao

University divisions

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