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dc.contributor.authorLin, Changyu*
dc.contributor.authorZou, Ding*
dc.contributor.authorLiu, Tao*
dc.contributor.authorDjordjevic, Ivan B*
dc.date.accessioned2017-03-13T23:45:00Z
dc.date.available2017-03-13T23:45:00Z
dc.date.issued2016-08-08
dc.identifier.citationCapacity achieving nonbinary LDPC coded non-uniform shaping modulation for adaptive optical communications. 2016, 24 (16):18095-104 Opt Expressen
dc.identifier.issn1094-4087
dc.identifier.pmid27505775
dc.identifier.doi10.1364/OE.24.018095
dc.identifier.urihttp://hdl.handle.net/10150/622821
dc.description.abstractA 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.
dc.language.isoenen
dc.publisherOPTICAL SOC AMERen
dc.relation.urlhttps://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-16-18095en
dc.rights© 2016 Optical Society of Americaen
dc.titleCapacity achieving nonbinary LDPC coded non-uniform shaping modulation for adaptive optical communications.en
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Dept Elect & Comp Engnen
dc.identifier.journalOptics expressen
dc.description.collectioninformationThis 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.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-08-15T03:53:02Z
html.description.abstractA 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.


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