Journal
IEEE TRANSACTIONS ON INFORMATION THEORY
Volume 66, Issue 1, Pages 478-495Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIT.2019.2941479
Keywords
Modulation; Wavelength division multiplexing; Solitons; Nonlinear optics; Fourier transforms; Frequency division multiplexing; Optical fiber; nonlinear Fourier transform; nonlinear frequency-division multiplexing; wavelength-division multiplexing
Funding
- Institute for Advanced Study at TU Munich - German Excellence Initiative
- Alexander von Humboldt Foundation - German Federal Ministry of Education and Research
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [805195]
- European Research Council (ERC) [805195] Funding Source: European Research Council (ERC)
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Two signal multiplexing schemes for optical fiber communication are considered: Wavelength-division multiplexing (WDM) and nonlinear frequency-division multiplexing (NFDM), based on the nonlinear Fourier transform. Achievable information rates (AIRs) of NFDM and WDM are compared in a network scenario with an ideal lossless model of the optical fiber in the defocusing regime. It is shown that the NFDM AIR is greater than the WDM AIR subject to a bandwidth and average power constraint, in a representative system with one symbol per user. The improvement results from nonlinear signal multiplexing.
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