Improved BER performance of hard-decision staircase code via geometric shaping

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Abstract

Staircase codes (SCCs) with hard decision (HD) decoding have attracted much attention in the optical communication community due to their outstanding performance and low decoding complexity [1]. Recently, an implementation agreement has been reached for using an SCC as an outer code in the baseline draft of 400G ZR [2]. To achieve high spectral efficiencies, forward error correction is typically combined with high order modulation formats. Additional gains can be obtained if regular quadrature amplitude modulation (QAM) constellations are replaced by constellations with geometric shaping (GS). In this paper, we consider GS with HD-SCC and analyze the post-SCC bit error rate (BER) performance of constellations with 64 points. Bose- Chaudhuri-Hocquenghem (BCH) codes are used as SCC component codes. The location of the constellation points is optimized by maximizing the achievable information rate. The simulation results show that the shaped constellations yield around 0.24 dB gains at a BER of 1e-6 when compared to regular 64QAM for different coding rates.
Original languageEnglish
Title of host publicationProceedings of the 2018 Symposium on Information Theory and Signal Processing in the Benelux
EditorsLuuk Spreeuwers, Jasper Goseling
Place of PublicationEnschede
PublisherTwente University
Pages132
ISBN (Electronic)978-90-365-4570-9
Publication statusPublished - 2018
Event2018 Symposium on Information Theory and Signal Processing in the Benelux (SITB 2018) - University of Twente, Enschede, Netherlands
Duration: 31 May 20181 Jun 2018
https://www.utwente.nl/en/eemcs/sitb2018/

Conference

Conference2018 Symposium on Information Theory and Signal Processing in the Benelux (SITB 2018)
Abbreviated titleSITB 2018
CountryNetherlands
CityEnschede
Period31/05/181/06/18
Internet address

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