Power Consumption for Coherent Optical Orthogonal Frequency Division Multiplexing With Punctured LDPC Codes and Variable Amplitude Block Codes

Recently, coherent optical OFDM (CO-OFDM) has been proposed in optical network to increase the transmission distance with combating chromatic dispersion. CO-OFDM system has been successfully processed and recovered for transmitted signals without chromatic dispersion compensation. However, in optica...

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Bibliographic Details
Published in:Journal of lightwave technology 2008-07, Vol.26 (14), p.2227-2234
Main Authors: Chang-Jun Ahn, Takahashi, S., Fujisaka, H., Kamio, T., Haeiwa, K.
Format: Article
Language:English
Subjects:
Amplitudes
Applied sciences
Block codes
Chromatic dispersion
Cobalt
Coding, codes
Coherence
Degradation
Detection, estimation, filtering, equalization, prediction
Dispersions
Energy consumption
Exact sciences and technology
Fiber optic communications
Fiber optic networks
Information, signal and communications theory
LDPC
Low density parity check codes
Multiplexing
OFDM
Optical fiber communication
Optical fiber communications
Optical fiber networks
Optical telecommunications
Orthogonal Frequency Division Multiplexing
Parity check codes
Piercing
Power consumption
RCPC codes
Safety
Signal and communications theory
Signal processing
Signal, noise
Telecommunications
Telecommunications and information theory
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Summary:Recently, coherent optical OFDM (CO-OFDM) has been proposed in optical network to increase the transmission distance with combating chromatic dispersion. CO-OFDM system has been successfully processed and recovered for transmitted signals without chromatic dispersion compensation. However, in optical links, the available optical power is limited due to safety and power consumption. Therefore, in this paper, we focus on the minimizing the optical power and propose the CO-OFDM with punctured LDPC codes and variable amplitude block codes. In the proposed system, we consider the rate-compatible punctured code (RCPC) without erasing the coded bits corresponding to zeros in the puncturing pattern and assign them to the subcarriers. In this case, the transmission rate is not degraded compared to the original code. Moreover, the coded bits corresponding to zeros in the puncturing pattern are mapped with reduced amplitude. Therefore, it is possible to increase the transmission distance with reducing the required OSNR for satisfying the target BER.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2008.920138