Performance analysis of modified asymmetrically-clipped optical orthogonal frequency-division multiplexing systems

Salma D. Mohamed, Hossam M.H. Shalaby, Ivan Andonovic, Moustafa H. Aly

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Abstract

A modification to the Asymmetrically-Clipped Optical Orthogonal Frequency-Division Multiplexing (ACO-OFDM) technique is proposed through unipolar encoding. A performance analysis of the Bit Error Rate (BER) is developed and Monte Carlo simulations are carried out to verify the analysis. Results are compared to that of the corresponding ACO-OFDM system under the same bit energy and transmission rate; an improvement of 1 dB is obtained at a BER of 10-4. In addition, the performance of the proposed system in the presence of atmospheric turbulence is investigated using single-input multiple-output (SIMO) configuration and its performance under that environment is compared to that of ACO-OFDM. Energy improvements of 4 dB and 2.2 dB are obtained at a BER of 10-4 for SIMO systems of 1 and 2 photodetectors at the receiver for the case of strong turbulence, respectively.

Original languageEnglish
Pages (from-to)61-68
Number of pages8
JournalOptics Communications
Volume380
Early online date6 Jun 2016
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • asymmetrically-clipped optical orthogonal
  • DC-biased optical OFDM (DCO-OFDM)
  • frequency-division multiplexing (ACO- OFDM)
  • multi-level quadrature amplitude modula- tion (M-QAM)
  • unipolar OFDM (U-OFDM)

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