Performance Enhancement of Optical Wireless OFDM Communication

Eltoukhi, Muhammed A.; Abd-Elnaby, Mohammed; El-Dolil, Sami A.; El-Samie, Fathi Abd

doi:10.21608/mjeer.2017.63619

	Performance Enhancement of Optical Wireless OFDM Communication
Menoufia Journal of Electronic Engineering Research
Article 10, Volume 26, Issue 2, July 2017, Page 461-478
Document Type: Original Article
DOI: 10.21608/mjeer.2017.63619
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Authors
Muhammed A. Eltoukhi¹; Mohammed Abd-Elnaby²; Sami A. El-Dolil²; Fathi Abd El-Samie³
¹Dept. of electronics and comm. Engineering, Delta Academy of Engineering and Technology, Mansoura, Egypt
²Dept. of electronics and comm. Engineering, Faculty of Elect., Eng., Menoufia University, Egypt.
³Dept. of electronics and comm. Engineering, Faculty of Elect., Eng., Menoufia University, Egypt
Abstract
^{Optical wireless Communication (OWC) is an optical radiation}^{for data transmission through free space, and it can be operated}^{indoor and outdoor. Asymmetrically clipped DC-biased Optical}^{OFDM (ADO-OFDM) is a type of indoor OWC based OFDM.A}^{conventional asymmetrically clipping optical (ACO)-OFDM is}^{applied to modulate odd subcarriers while even subcarriers are}^{modulated by a novel technique called DC-biased optical OFDM}^{(DCO-OFDM). ADO has better optical power performance than}^{conventional ACO-OFDM and DCO-OFDM methods. The main}^{drawback of ADO is the clipping noise which falls just on the}^{even subcarriers. So, in this paper convolutional and turbo}^{coding techniques are investigated to improve the error}^{performance of ADO-OFDM system over Additive White}^{Gaussian Noise (AWGN) and diffuse channel. Simulation results}^{show that the proposed coded ADO-OFDM using convolutional}^{and turbo coding techniques achieve significantly lower bit error}^{rate (BER) compared to the uncoded ADO-OFDM. In addition,}^{turbo coded ADO-OFDM gives the best BER performance}.


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