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

Mohamed, Salma D. and Shalaby, Hossam M.H. and Andonovic, Ivan and Aly, Moustafa H. (2016) Performance analysis of modified asymmetrically-clipped optical orthogonal frequency-division multiplexing systems. Optics Communications, 380. pp. 61-68. ISSN 0030-4018

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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.