Hard-Decision Coded Modulation for High-Throughput Short-Reach Optical Interconnect

Bin Chen, Yi Lei (Corresponding author), Gabriele Liga, Chigo M. Okonkwo, Alex Alvarado

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4 Citaten (Scopus)
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Samenvatting

Coded modulation (CM), a combination of forward error correction (FEC) and high order modulation formats, has become a key part of modern optical communication systems. Designing CM schemes with strict complexity requirements for optical communications (e.g., data center interconnects) is still challenging mainly because of the expected low latency, low overhead, and the stringent high data rate requirements. In this paper, we propose a CM scheme with bit-wise hard-decision FEC and geometric shaping. In particular, we propose to combine the recently introduced soft-aided bit-marking decoding algorithm for staircase codes (SCCs) with geometrically-shaped constellations. The main goal of this CM scheme is to jointly boost the coding gain and provide shaping gain, while keeping the complexity low. When compared to existing CM systems based on M-ary quadrature-amplitude modulation (MQAM, M=64,128,256 ) and conventional decoding of SCCs, the proposed scheme shows improvements of up to 0.83 dB at a bit-error rate of 10−6 in the additive white Gaussian noise channel. For a nonlinear optical fiber system, simulation results show up to 24% reach increase. In addition, the proposed CM scheme enables rate adaptivity in single-wavelength systems, offering six different data rates between 450 Gbit/s and 666 Gbit/s.
Originele taal-2Engels
Artikelnummer400
TijdschriftEntropy
Volume22
Nummer van het tijdschrift4
DOI's
StatusGepubliceerd - 1 apr. 2020

Financiering

Funding: The work of B. Chen is supported by the National Natural Science Foundation of China (NSFC) under Grant 61701155 and Fundamental Research Funds for the Central Universities under Grant JZ2019HGBZ0130 and JZ2020HGTB0015. The work of Y. Lei is supported by the Fundamental Research Funds for the Central Universities under Grant JZ2019HGBZ0126 and JZ2020HGTA0072. The work of G. Liga is funded by the EUROTECH postdoc programme under the European Union’s Horizon 2020 research and innovation programme (Marie Skłodowska-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).

FinanciersFinanciernummer
H2020 Marie Skłodowska-Curie Actions
Horizon 2020 Framework Programme754462
European Research Council
National Natural Science Foundation of China61701155
Nederlandse Organisatie voor Wetenschappelijk Onderzoek15685
Horizon 2020757791
Fundamental Research Funds for the Central UniversitiesJZ2020HGTB0015, JZ2019HGBZ0126, JZ2019HGBZ0130, JZ2020HGTA0072

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