Experimental study of non-binary LDPC coding for long-haul coherent optical QPSK transmissions | Zendy

Shaoliang Zhang | Zendy; Murat Arabaci | Zendy; Fatih Yaman | Zendy; Ivan B. Djordjević | Zendy; Lei Xu | Zendy; Ting Wang | Zendy; Yoshihisa Inada | Zendy; Takaaki Ogata | Zendy; Yasuhiro Aoki | Zendy

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Experimental study of non-binary LDPC coding for long-haul coherent optical QPSK transmissions

Author(s) -

Shaoliang Zhang,

Murat Arabaci,

Fatih Yaman,

Ivan B. Djordjević,

Lei Xu,

Ting Wang,

Yoshihisa Inada,

Takaaki Ogata,

Yasuhiro Aoki

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.019042

Subject(s) - low density parity check code , phase shift keying , interleaving , forward error correction , optics , computer science , coding gain , wavelength division multiplexing , bit error rate , multiplexing , polarization mode dispersion , coding (social sciences) , physics , electronic engineering , decoding methods , algorithm , telecommunications , optical fiber , mathematics , wavelength , engineering , statistics , operating system

The performance of rate-0.8 4-ary LDPC code has been studied in a 50 GHz-spaced 40 Gb/s DWDM system with PDM-QPSK modulation. The net effective coding gain of 10 dB is obtained at BER of 10(-6). With the aid of time-interleaving polarization multiplexing and MAP detection, 10,560 km transmission over legacy dispersion managed fiber is achieved without any countable errors. The proposed nonbinary quasi-cyclic LDPC code achieves an uncoded BER threshold at 4×10(-2). Potential issues like phase ambiguity and coding length are also discussed when implementing LDPC in current coherent optical systems.

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