On the Capacity of b-Modulated Nonlinear Frequency Division Multiplexing

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

Abstract

In this paper, we investigate the capacity of the continuous spectrum of nonlinear frequency division multiplexing (NFDM) systems when data is encoded using b-modulation. Recently, a tractable channel model is proposed for such optical fiber communication systems, describing the received b-modulated signal with an input-dependent complex Gaussian distributed noise. Considering this channel model, we prove that the capacity-achieving distribution is unique and discrete. A search algorithm is proposed to determine the optimal discrete input distribution that maximizes the mutual information. The numerical results show that the optimal input distributions form ring-based constellations. We compare these optimal designs with some conventional ring-based amplitude and phase shift keying (APSK) modulation schemes including 16 APSK, 32 APSK and 64 APSK, to show the achievable performance gains.
Original languageEnglish
Title of host publication2022 IEEE International Symposium on Information Theory (ISIT)
PublisherIEEE Xplore
ISBN (Electronic)978-1-6654-2159-1
ISBN (Print)978-1-6654-2159-1
DOIs
Publication statusPublished - 3 Aug 2022
EventIEEE International Symposium on Information Theory, ISIT 2022 - Aalto University, Espoo, Finland
Duration: 26 Jun 20221 Jul 2022
https://www.isit2022.org/

Publication series

NameIEEE International Symposium on Information Theory (ISIT)
PublisherIEEE
ISSN (Print)2157-8095
ISSN (Electronic)2157-8117

Conference

ConferenceIEEE International Symposium on Information Theory, ISIT 2022
Abbreviated title ISIT 2022
Country/TerritoryFinland
CityEspoo
Period26/06/221/07/22
Internet address

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