Introducing enumerative sphere shaping for optical communication systems with short blocklengths
| Autor: | Olga Vassilieva, Chigo Okonkwo, Sebastiaan Goossens, Yunus Can Gultekin, Alex Alvarado, Inwoong Kim, Tadashi Ikeuchi, Frans M. J. Willems, Abdelkerim Amari |
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| Přispěvatelé: | Information and Communication Theory Lab, Signal Processing Systems, Eindhoven Hendrik Casimir institute, Electro-Optical Communication, High Capacity Optical Transmission, Center for Quantum Materials and Technology Eindhoven, Center for Wireless Technology Eindhoven, Institute for Photonic Integration |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
FOS: Computer and information sciences
enumerative sphere shaping Computer science Information Theory (cs.IT) Computer Science - Information Theory Optical communication 020206 networking & telecommunications 02 engineering and technology Topology Atomic and Molecular Physics and Optics 020210 optoelectronics & photonics Constant composition distribution matching optical communication systems Atomic and Molecular Physics 0202 electrical engineering electronic engineering information engineering fiber nonlinearity probabilistic shaping Fiber and Optics Decoding methods Communication channel |
| Zdroj: | Journal of Lightwave Technology, 37(23):8850066, 5926-5936. IEEE/LEOS Journal of Lightwave Technology |
| ISSN: | 0733-8724 |
| DOI: | 10.1109/jlt.2019.2943938 |
| Popis: | Probabilistic shaping based on constant composition distribution matching (CCDM) has received considerable attention as a way to increase the capacity of fiber optical communication systems. CCDM suffers from significant rate loss at short blocklengths and requires long blocklengths to achieve high shaping gain, which makes its implementation very challenging. In this paper, we propose to use enumerative sphere shaping (ESS) and investigate its performance for the nonlinear fiber optical channel. ESS has lower rate loss than CCDM at the same shaping rate, which makes it a suitable candidate to be implemented in real-time high-speed optical systems. In this paper, we first show that finite blocklength ESS and CCDM exhibit higher effective signal-to-noise ratio than their infinite blocklength counterparts. These results show that for the nonlinear fiber optical channel, large blocklengths should be avoided. We then show that for a 400 Gb/s dual-polarization 64-QAM WDM transmission system, ESS with short blocklengths outperforms both uniform signaling and CCDM. Gains in terms of both bit-metric decoding rate and bit-error rate are presented. ESS with a blocklength of 200 is shown to provide an extension reach of about 200 km in comparison with CCDM with the same blocklength. The obtained reach increase of ESS with a blocklength of 200 over uniform signaling is approximately 450 km (approximately 19%) 9 pages, 12 figures |
| Databáze: | OpenAIRE |
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