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Proceedings Paper

On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission
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Paper Abstract

Two reduced-complexity (RC) LDPC decoders are proposed, which can be used in combination with large-girth LDPC codes to enable beyond 400 Gb/s serial optical transmission. We show that optimally attenuated RC min-sum sum algorithm performs only 0.45 dB worse than conventional sum-product algorithm, while having lower storage memory requirements and much lower latency. We further evaluate the proposed algorithms for use in beyond 400 Gb/s serial optical transmission in combination with PolMUX 32-IPQ-based signal constellation and show that low BERs can be achieved for medium optical SNRs, while achieving the net coding gain above 11.4 dB.

Paper Details

Date Published: 18 February 2011
PDF: 6 pages
Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 79881G (18 February 2011); doi: 10.1117/12.888344
Show Author Affiliations
Ivan B. Djordjevic, The Univ. of Arizona (United States)
Lei Xu, NEC Labs. America, Inc. (United States)
Ting Wang, NEC Labs. America, Inc. (United States)


Published in SPIE Proceedings Vol. 7988:
Optical Transmission Systems, Switching, and Subsystems VIII
Yikai Su; Ernesto Ciaramella; Xiang Liu; Naoya Wada, Editor(s)

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