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Discrete-circulant-transform spread OFDM for bandwidth-limited VLC systems

Discrete-circulant-transform spread OFDM for bandwidth-limited VLC systems
Discrete-circulant-transform spread OFDM for bandwidth-limited VLC systems

We propose and investigate discrete-circulant transform spread orthogonal frequency division multiplexing (DCrT-S-OFDM) for bandwidth-limited optical systems. We derive the conditions for optimal designs of DCrT-S-OFDM in the noise limited scenarios and verify its bit error rate advantage over conventional OFDM. We also analytically investigate the performance of DCrT-S-OFDM under the effect of inter-symbol interference (ISI) and inter-carrier interference (ICI), and prove its performance advantage over discrete-Fourier-transform spread OFDM (DFT-S-OFDM). Based on the developed theory, we propose several novel designs of DCrT-S-OFDM to achieve optimal or near-optimal performance. Extensive simulations have been performed in a visible light communication (VLC) system to validate the findings. The results agree with the theory and verify the performance advantage of DCrT-S-OFDM over other schemes. Finally, a ∼650-Mbit/s VLC system with ∼70-MHz 3-dB system bandwidth was experimentally demonstrated. The results also confirm that DCrT-S-OFDM outperforms conventional OFDM and DFT-S-OFDM, making the proposed DCrT-S-OFDM a promising solution for optical systems using low-bandwidth devices to achieve high data rates.

and visible light communications, Discrete circulant transform, OFDM, optical communications
0733-8724
5340-5353
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
73d5144c-02db-4977-b517-0d2f5a052807
Chen, Lian Kuan
4b088e27-3c85-44c7-9203-3e9c7d423558

Zhao, Jian, Hong, Yang and Chen, Lian Kuan (2019) Discrete-circulant-transform spread OFDM for bandwidth-limited VLC systems. IEEE Journal of Lightwave Technology, 37 (20), 5340-5353, [8784205]. (doi:10.1109/JLT.2019.2932568).

Record type: Article

Abstract

We propose and investigate discrete-circulant transform spread orthogonal frequency division multiplexing (DCrT-S-OFDM) for bandwidth-limited optical systems. We derive the conditions for optimal designs of DCrT-S-OFDM in the noise limited scenarios and verify its bit error rate advantage over conventional OFDM. We also analytically investigate the performance of DCrT-S-OFDM under the effect of inter-symbol interference (ISI) and inter-carrier interference (ICI), and prove its performance advantage over discrete-Fourier-transform spread OFDM (DFT-S-OFDM). Based on the developed theory, we propose several novel designs of DCrT-S-OFDM to achieve optimal or near-optimal performance. Extensive simulations have been performed in a visible light communication (VLC) system to validate the findings. The results agree with the theory and verify the performance advantage of DCrT-S-OFDM over other schemes. Finally, a ∼650-Mbit/s VLC system with ∼70-MHz 3-dB system bandwidth was experimentally demonstrated. The results also confirm that DCrT-S-OFDM outperforms conventional OFDM and DFT-S-OFDM, making the proposed DCrT-S-OFDM a promising solution for optical systems using low-bandwidth devices to achieve high data rates.

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More information

Accepted/In Press date: 27 July 2019
e-pub ahead of print date: 1 August 2019
Published date: 15 October 2019
Keywords: and visible light communications, Discrete circulant transform, OFDM, optical communications

Identifiers

Local EPrints ID: 435978
URI: http://eprints.soton.ac.uk/id/eprint/435978
ISSN: 0733-8724
PURE UUID: d92d2bbc-200a-425f-9c83-b14c033fda0e

Catalogue record

Date deposited: 25 Nov 2019 17:30
Last modified: 25 Nov 2019 17:30

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