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An adaptive scaling and biasing scheme for OFDM-based visible light communication systems

An adaptive scaling and biasing scheme for OFDM-based visible light communication systems
An adaptive scaling and biasing scheme for OFDM-based visible light communication systems
Orthogonal frequency-division multiplexing (OFDM) has been widely used in visible light communication systems to achieve high-rate data transmission. Due to the nonlinear transfer characteristics of light emitting diodes (LEDs) and owing the high peak-to-averagepower ratio of OFDM signals, the transmitted signal has to be scaled and biased before modulating the LEDs. In this contribution, an adaptive scaling and biasing scheme is proposed for OFDM based visible light communication systems, which fully exploits the dynamic range of the LEDs and improves the achievable system performance. Specifically, the proposed scheme calculates near-optimal scaling and biasing factors for each specific OFDM symbol according to the distribution of the signals, which strikes an attractive trade-off between the effective signal power and the clipping distortion power. Our simulation results demonstrate that the proposed scheme significantly improves the performance without changing the LED’s emitted power, while maintaining the same receiver structure.
1094-4087
12707-12715
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Wang, Zhaocheng, Wang, Qi, Chen, Sheng and Hanzo, Lajos (2014) An adaptive scaling and biasing scheme for OFDM-based visible light communication systems. Optics Express, 22 (10), 12707-12715.

Record type: Article

Abstract

Orthogonal frequency-division multiplexing (OFDM) has been widely used in visible light communication systems to achieve high-rate data transmission. Due to the nonlinear transfer characteristics of light emitting diodes (LEDs) and owing the high peak-to-averagepower ratio of OFDM signals, the transmitted signal has to be scaled and biased before modulating the LEDs. In this contribution, an adaptive scaling and biasing scheme is proposed for OFDM based visible light communication systems, which fully exploits the dynamic range of the LEDs and improves the achievable system performance. Specifically, the proposed scheme calculates near-optimal scaling and biasing factors for each specific OFDM symbol according to the distribution of the signals, which strikes an attractive trade-off between the effective signal power and the clipping distortion power. Our simulation results demonstrate that the proposed scheme significantly improves the performance without changing the LED’s emitted power, while maintaining the same receiver structure.

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More information

e-pub ahead of print date: 16 May 2014
Published date: 19 May 2014
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 365027
URI: https://eprints.soton.ac.uk/id/eprint/365027
ISSN: 1094-4087
PURE UUID: 174772aa-7a34-4bd0-b906-361ab0c79cef
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 20 May 2014 11:15
Last modified: 11 Nov 2017 11:18

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Contributors

Author: Zhaocheng Wang
Author: Qi Wang
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD

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