Comparison of Asymmetrically Clipped Optical OFDM and DC-Biased Optical OFDM in AWGN |
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| Authors: | Armstrong J. Schmidt B.J.C. |
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| Affiliation: | Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, VIC; |
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| Abstract: | We present theoretical and simulation results for the performance of asymmetrically-clipped optical OFDM (ACO-OFDM) and DC-biased optical OFDM (DCO-OFDM) in AWGN for intensity-modulated direct-detection systems. Constellations from 4 QAM to 1024 QAM are considered. For DCO-OFDM, the optimum bias depends on the constellation size which limits its performance in adaptive systems. ACO-OFDM requires less optical power for a given data rate than DCO-OFDM for all but the largest constellations and is better suited to adaptive systems as the same structure is optimum for all constellations. |
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