Robust timing synchronization for AC-OFDM based optical wireless communications

Bilal A. Ranjha, Mohammadreza A. Kashani, Mohsen Kavehrad, Peng Deng

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

2 Scopus citations

Abstract

Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for AC OFDM schemes and outperforms all other available techniques. Both numerical and experimental results confirm the accuracy of the proposed method. Our technique is also computationally efficient as it requires very few computations as compared to conventional methods in order to achieve good accuracy.

Original languageEnglish (US)
Title of host publicationICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesB41-B410
ISBN (Electronic)9781479989522
DOIs
StatePublished - Jun 10 2015
Event2015 15th Annual Integrated Communication, Navigation and Surveillance Conference, ICNS 2015 - Herdon, United States
Duration: Apr 21 2015Apr 23 2015

Publication series

NameICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings

Other

Other2015 15th Annual Integrated Communication, Navigation and Surveillance Conference, ICNS 2015
CountryUnited States
CityHerdon
Period4/21/154/23/15

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Communication

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    Ranjha, B. A., Kashani, M. A., Kavehrad, M., & Deng, P. (2015). Robust timing synchronization for AC-OFDM based optical wireless communications. In ICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings (pp. B41-B410). [7121217] (ICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICNSURV.2015.7121217