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Parallel Bisection-Based Distribution Matching for Nonlinearity-Tolerant Probabilistic Shaping in Coherent Optical Communication Systems

A nonlinearity-tolerant constant composition distribution matching (CCDM) scheme based on a parallel bisection architecture is proposed. Compared with CCDM based on arithmetic coding (AC), the bisection-based CCDM (BS-CCDM) can achieve the same linear performance and an improved tolerance to fiber nonlinear impairments in unrepeated fiber transmissions. The same linear performance of AC-CCDM and BS-CCDM is evaluated both in simulations and experiments with various modulation formats and shaping rates. The improved fiber nonlinear performance is demonstrated in simulations with probabilistically shaped dual-polarization 16-ary quadrature amplitude modulation (DP-16QAM) signals for unrepeated transmission over 250 km of standard single-mode fiber (SSMF). BS-CCDM provides a ∼0.22 dB gain in effective signal-to-noise ratio (SNR) on average over AC-CCDM for a variety of spectral efficiencies with a block length of 64. And a gain in achievable information rate (AIR) of ∼0.11 bits/4D-symbol is obtained correspondingly. In addition, by further optimizing the look-up tables (LUTs) in BS-CCDM, a better trade-off between the linear performance and nonlinearity tolerance is achieved. Compared with AC-CCDM, the optimized BS-CCDM provides the gain of 0.48 dB and 0.7 dB in effective SNR for the block length of 64 and 128, respectively.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.20 October 15 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 6459-6469

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

QUADRATURE AMPLITUDE MODULATION
PROBABILISTIC SHAPING
COHERENT OPTICAL TRANSMISSION
NONLINEAR FIBER CHANNEL

Info Detail Spesifik

DOI: 10.1109/JLT.2021.3102269

Pernyataan Tanggungjawab

Mengfan Fu, Qiaoya Liu, Huazhi Lun, Hexun Jiang, Yiwen Wu, Xiaomin Liu, Zhiyuan Yang, Lilin Yi, Weisheng Hu, Qunbi Zhuge

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