Optical spatial modulation with DHT-based OFDM in visible light communication systems

Yali Cao, Xiaotian Zhou, Jian Sun, Wensheng Zhang, Cheng-Xiang Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a novel orthogonal frequency division multiplexing (OFDM) modulation scheme based on discrete Hartley transform (DHT) combined with optical spatial modulation (OSM) is proposed for visible light communication (VLC) systems. In the proposed scheme, the function of the conventional discrete Fourier transform (DFT) is fulfilled by the DHT and real constellation schemes such as binary phase shift keying (BPSK) and pulse amplitude modulation (PAM) can be used. Hence, real signals are generated and then modulated to two light emitting diodes (LEDs) by employing OSM. The zero-forcing (ZF) scheme and maximum a posteriori (MAP) scheme are employed in the receiver. Simulation results indicate that the proposed scheme can achieve the required performance in terms of bit error rate (BER). The performance of Non-DC-biased OFDM (NDC-OFDM), generalized LED index modulation optical OFDM (GLIM-OFDM), and the proposed scheme is compared. It is shown that the proposed scheme has lower complexity than NDC-OFDM, and shows better BER performance and higher design flexibility than GLIM-OFDM.

Original languageEnglish
Title of host publication2017 9th International Conference on Wireless Communications and Signal Processing (WCSP)
PublisherIEEE
ISBN (Electronic)9781538620625
DOIs
Publication statusPublished - 11 Dec 2017

Publication series

NameInternational Conference on Wireless Communications and Signal Processing
PublisherIEEE
ISSN (Print)2472-7628

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Keywords

  • BER
  • discrete Hartley transform (DHT)
  • MIMO-OFDM
  • optical spatial modulation
  • VLC

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

Cite this

Cao, Y., Zhou, X., Sun, J., Zhang, W., & Wang, C-X. (2017). Optical spatial modulation with DHT-based OFDM in visible light communication systems. In 2017 9th International Conference on Wireless Communications and Signal Processing (WCSP) [8170933] (International Conference on Wireless Communications and Signal Processing). IEEE. https://doi.org/10.1109/WCSP.2017.8170933