A Lower Bound on the Capacity of b-Modulated NFDM Systems

Amin Baniasadi, Yu Chen, Alex Dytso, Luca Barletta, Majid Safari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

In this paper, we investigate the capacity of the b-modulated nonlinear frequency division multiplexing (NFDM) systems. Recently, a tractable channel model was proposed for such optical fiber communication systems, describing the
received b-modulated signal by an input-dependent complex Gaussian distributed noise. Considering this channel model, we prove that the capacity achieving input distribution has discrete amplitude, uniform independent phase (DAUIP). Noting that this distribution is supported on a finite number of concentric shells, we find a lower bound for the capacity by assuming a single shell support. The corresponding output distribution and mutual information expressions are derived in closed-form.
Original languageEnglish
Title of host publicationGLOBECOM 2023 - 2023 IEEE Global Communications Conference
PublisherIEEE Xplore
Number of pages6
Publication statusE-pub ahead of print - 26 Feb 2024
EventGLOBECOM 2023 - 2023 IEEE Global Communications Conference - Kuala Lumpur, Malaysia
Duration: 4 Dec 20238 Dec 2023


ConferenceGLOBECOM 2023 - 2023 IEEE Global Communications Conference
CityKuala Lumpur

Keywords / Materials (for Non-textual outputs)

  • Optical fiber communication
  • Nonlinear Fourier Transform (NFT)
  • optical fiber capacity
  • b-modulation
  • input-dependent noise channel
  • Nonlinear Frequency Division Multiplexing (NFDM)


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