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

Ivan B. Djordjevic; Lei Xu; Ting Wang

doi:10.1117/12.888344

18 February 2011 On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission

Ivan B. Djordjevic, Lei Xu, Ting Wang

Proceedings Volume 7988, Optical Transmission Systems, Switching, and Subsystems VIII; 79881G (2011) https://doi.org/10.1117/12.888344
Event: Asia Communications and Photonics Conference and Exhibition, 2010, Shanghai, Shanghai, China

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.

Citation Download Citation

Ivan B. Djordjevic, Lei Xu, and Ting Wang "On the reduced-complexity of LDPC decoders for beyond 400 Gb/s serial optical transmission", Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 79881G (18 February 2011); https://doi.org/10.1117/12.888344

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