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Why Constant-Composition Codes Reduce Nonlinear Interference Noise
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DOI：10.1109/JLT.2023.3244927.png)
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摘要
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A time-domain perturbation model of the nonlinear Schrodinger equation is used to study wave-length-division multiplexed communication over a single polarization. The model explains (a) why constant-composition codes offer an improvement in signal-to-noise ratio compared with independent and uniform selection of constellation points and (b) why similar gains are obtained using carrier recovery algorithms even without using constant-composition codes.
Keyword:
Wavelength division multiplexing
cross-phase modulation
nonlinear interference noise
constant-composition codes
carrier recovery