On Parameter Optimization and Reach Enhancement for the Improved Soft-Aided Staircase Decoder

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2 Citations (Scopus)

Abstract

The so-called improved soft-aided bit-marking algorithm was recently proposed for staircase codes (SCCs) in the context of fiber optical communications. This algorithm is known as iSABM-SCC. With the help of channel soft information, the iSABM-SCC decoder marks bits via thresholds to deal with both miscorrections and failures of hard-decision (HD) decoding. In this paper, we study iSABM-SCC focusing on the parameter optimization of the algorithm and its performance analysis, in terms of the gap to the achievable information rates (AIRs) of HD codes and the fiber reach enhancement. We show in this paper that the marking thresholds and the number of modified component decodings heavily affect the performance of iSABM-SCC, and thus, they need to be carefully optimized. By replacing standard decoding with the optimized iSABM-SCC decoding, the gap to the AIRs of HD codes can be reduced to 0.26-1.02 dB for code rates of 0.74-0.87 in the additive white Gaussian noise channel with 8-ary pulse amplitude modulation. The obtained reach increase is up to 22% for data rates between 401 Gbps and 468 Gbps in an optical fiber channel.

Original languageEnglish
Title of host publication2021 11th International Symposium on Topics in Coding (ISTC)
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)978-1-6654-0943-8
DOIs
Publication statusPublished - 13 Nov 2021
Event11th International Symposium on Topics in Coding, ISTC 2021 - Montreal, Canada
Duration: 30 Aug 20213 Sept 2021

Conference

Conference11th International Symposium on Topics in Coding, ISTC 2021
Country/TerritoryCanada
CityMontreal
Period30/08/213/09/21

Funding

This work is partially supported by the NSFC Program (No. 62001151) and Fundamental Research Funds for the Central Universities (JZ2020HGTA0072, JZ2020HGTB0015),andAnhuiProvincialNaturalScienceFoundation (2008085QF282). The work of G. Liga is funded by the EUROTECH postdoc programme under the European Union Horizon 2020 research and innovation programme(Marie Skodowska-Curiegrantagreement No754462). Thework of A. Alvarado is supported by the Netherlands Organisation for Scientific Research (NWO) via the VIDI Grant ICONIC (project number 15685) and the European Research Council (ERC) under the European Unions Horizon 2020researchandinnovationprogramme(grantagreementNo.757791). This work is partially supported by the NSFC Program (No. 62001151) and Fundamental Research Funds for the Central Universities (JZ2020HGTA0072, JZ2020HGTB0015), and Anhui Provincial Natural Science Foundation (2008085QF282). The work of G. Liga is funded by the EUROTECH postdoc programme under the European Union Horizon 2020 research and innovation programme (Marie Skodowska-Curie grant agreement No 754462). The work of A. Alvarado is supported by the Netherlands Organisation for Scientific Research (NWO) via the VIDI Grant ICONIC (project number 15685) and the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement No. 757791).

Keywords

  • Forward error correction
  • Log-likelihood ratios
  • Optical fiber communications
  • Staircase codes

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