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    Capacity achieving nonbinary LDPC coded non-uniform shaping modulation for adaptive optical communications.

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    Author
    Lin, Changyu
    Zou, Ding
    Liu, Tao
    Djordjevic, Ivan B
    Affiliation
    Univ Arizona, Dept Elect & Comp Engn
    Issue Date
    2016-08-08
    
    Metadata
    Show full item record
    Publisher
    OPTICAL SOC AMER
    Citation
    Capacity achieving nonbinary LDPC coded non-uniform shaping modulation for adaptive optical communications. 2016, 24 (16):18095-104 Opt Express
    Journal
    Optics express
    Rights
    © 2016 Optical Society of America.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    A mutual information inspired nonbinary coded modulation design with non-uniform shaping is proposed. Instead of traditional power of two signal constellation sizes, we design 5-QAM, 7-QAM and 9-QAM constellations, which can be used in adaptive optical networks. The non-uniform shaping and LDPC code rate are jointly considered in the design, which results in a better performance scheme for the same SNR values. The matched nonbinary (NB) LDPC code is used for this scheme, which further improves the coding gain and the overall performance. We analyze both coding performance and system SNR performance. We show that the proposed NB LDPC-coded 9-QAM has more than 2dB gain in symbol SNR compared to traditional LDPC-coded star-8-QAM. On the other hand, the proposed NB LDPC-coded 5-QAM and 7-QAM have even better performance than LDPC-coded QPSK.
    ISSN
    1094-4087
    PubMed ID
    27505775
    DOI
    10.1364/OE.24.018095
    Version
    Final published version
    Additional Links
    https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-16-18095
    ae974a485f413a2113503eed53cd6c53
    10.1364/OE.24.018095
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