PAPR Reduction of OFDM Signal for Visible Light Communication by Using Hartley Transform and Companding Techniques

DOI

10.2991/nceece-15.2016.151How to use a DOI?

Keywords

Visible Light Communication; DC-OFDM; precoding; PAPR; companding

Abstract

OFDM Visible light communication (VLC) systems can achieve both illumination and data transmission simultaneously via light emitting diodes (LEDs). Orthogonal frequency-division multiplexing (OFDM) has been considered as a promising multi-carrier modulation technique for VLC due to its ability to boost data rates and efficiently combat inter-symbol-interference (ISI). However, the peak-to-average power ratio (PAPR) is the main problem of the OFDM-based VLC system. In this paper, a combined discrete Hartley transform (DHT) precoding and companding transform scheme is proposed to reduce the PAPR of OFDM-based VLC systems. The performance of the proposed PAPR reduction scheme is studied via simulation. Simulation results show that the proposed scheme may obtain significant PAPR reduction compared to the previously proposed DHT spread (DHTS) and conventional companding transform (CT) in terms of PAPR reduction capability. The bit error rate (BER) performance of the OFDM-based VLC system with combined DHT precoding and companding is also evaluated over an indoor dispersive VLC channel model. The simulation shows that the BER of the proposed scheme outperforms that of the companding scheme used alone.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Zhongpeng Wang
AU  - Fangni Chen
AU  - Jianfeng Weng
PY  - 2015/12
DA  - 2015/12
TI  - PAPR Reduction of OFDM Signal for Visible Light Communication by Using Hartley Transform and Companding Techniques
BT  - Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering
PB  - Atlantis Press
SP  - 819
EP  - 824
SN  - 2352-5401
UR  - https://doi.org/10.2991/nceece-15.2016.151
DO  - 10.2991/nceece-15.2016.151
ID  - Wang2015/12
ER  -