Efficient coding techniques for ADO-OFDM in IM/DD systems

  • Muhammed Abd El-Aziz Eltoukhi
  • Mohammed Abd-Elnaby
  • Sami A. El-Dolil
  • Fathi E. Abd El-Samie
Original Paper
  • 5 Downloads

Abstract

Optical wireless communication (OWC) is an age-long technology, which is based on optical data transmission through free space, and it can be implemented in both indoor and outdoor applications. Asymmetrically clipped DC-biased optical orthogonal frequency division multiplexing (ADO-OFDM) is a modulation scheme that can be utilized in indoor OWC systems. It is based on transmitting DC-biased optical OFDM (DCO-OFDM) for even-frequency subcarriers and asymmetrically clipped optical OFDM (ACO-OFDM) for odd-frequency subcarriers. The ADO-OFDM exhibits better optical power performance than those of the conventional ACO-OFDM and DCO-OFDM. The main disadvantage of ADO-OFDM is the clipping noise, which mainly affects the even subcarriers. So, in this paper, convolutional and turbo coding techniques are investigated to improve the bit error rate performance of the ADO-OFDM over Additive white Gaussian noise and diffuse channels. Simulation results show that the proposed coded ADO-OFDM using convolutional and turbo coding techniques achieves significantly lower BERs compared to that of the uncoded ADO-OFDM. In addition, turbo-coded ADO-OFDM gives the best BER performance.

Keywords

Optical Wireless Communication (OWC) Optical OFDM Coding 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringDelta Academy of Engineering and TechnologyMansouraEgypt
  2. 2.Department of Electronics and Communication Engineering, Faculty of Electronic EngineeringMenoufia UniversityMenoufEgypt

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