Comparison of Asymmetrically Clipped Optical OFDM and DC-Biased Optical OFDM in AWGN

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 dep...

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Bibliographic Details
Published in:IEEE communications letters 2008-05, Vol.12 (5), p.343-345
Main Authors: Armstrong, J., Schmidt, B.J.C.
Format: Article
Language:English
Subjects:
Adaptive optics
Adaptive systems
Applied sciences
Asymmetry
AWGN
Bias
Constellations
Exact sciences and technology
Information, signal and communications theory
Intensity modulation
Intersymbol interference
Modulation, demodulation
Multiplexing
OFDM modulation
Optical fiber communication
Optical modulation
Optical transmitters
Optimization
Orthogonal Frequency Division Multiplexing
Quadrature amplitude modulation
Signal and communications theory
Simulation
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary: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.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.080193