Nonlinearity Tolerant LUT-based Probabilistic Shaping for Extended-Reach Single-Span Links


We propose Huffman-coded sphere shaping (HCSS) as a method for probabilistic constellation shaping which provides improved tolerance to fiber nonlinearities in single-span links. An implementation of this algorithm based on look-up-tables (LUTs) allows for low-complexity, multiplier-free shaping. The advantage of short-length shaping for mitigating fiber nonlinear impairments is experimentally demonstrated for a system employing dual–polarization 64–ary quadrature amplitude modulation (DP-64QAM) at 56 GBd and operating over 210 km of standard single-mode fiber (SSMF). A gain in achievable information rate (AIR) of 0.4 bits/4D-symbol compared with uniform signaling is measured, corresponding to a 100% improvement in shaping gain compared with ideal Maxwell–Boltzmann (MB) shaping. The combinatorial mapping and demapping algorithms can be implemented with integer addition and comparison operations only, utilizing an LUT with 100 kbit size.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Probabilistic shaping,experimental validation,multiplier-free LUT,nonlinear fiber channel,sphere shaping,Electronic, Optical and Magnetic Materials,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Publication ISSN: 1941-0174
Last Modified: 08 Dec 2023 11:34
Date Deposited: 09 Jul 2020 07:05
Full Text Link:
Related URLs: https://ieeexpl ... cument/9131860/ (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2020-08-15
Published Online Date: 2020-07-02
Accepted Date: 2020-07-01
Authors: Skvortcov, Pavel
Phillips, Ian (ORCID Profile 0000-0002-2776-8939)
Forysiak, Wladek (ORCID Profile 0000-0001-5411-1193)
Koike-akino, Toshiaki
Kojima, Keisuke
Parsons, Kieran
Millar, David S.



Version: Accepted Version

| Preview

Export / Share Citation


Additional statistics for this record