Direct Current Bias Optimization of the LDPC Coded DCO-OFDM Systems

In this letter, a direct current (DC) bias optimization scheme is proposed for the low-density parity-check (LDPC) coded DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) systems from consideration of power efficiency and dimming control. The DC bias can be optimized subject to...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 27; no. 19; pp. 2095 - 2098
Main Authors Jiang, Ming, Zhang, Jun, Liang, Xiao, Zhao, Chunming
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2015
Subjects
Adaptive optics
convergence threshold
DC bias
DCO-OFDM
EXIT
High-speed optical techniques
LDPC
Noise
OFDM
Optical distortion
Optical noise
Parity check codes
LDPC
DCO-OFDM
EXIT
DC bias
convergence threshold
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Summary:In this letter, a direct current (DC) bias optimization scheme is proposed for the low-density parity-check (LDPC) coded DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) systems from consideration of power efficiency and dimming control. The DC bias can be optimized subject to the decoding convergence threshold, which is calculated by the extrinsic information transfer (EXIT) chart analysis for the LDPC coded DCO-OFDM systems. The simulations demonstrate that the decoding performance with different DC bias is quite consistent with the numerical results after the EXIT chart analysis.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2453344