Low complexity soft differential decoding of QPSK for forward in coherent optic receivers

M. Kuschnerov, S. Calabro, K. Piyawanno, B. Spinnler, M.S. Alfiad, A. Napoli, B. Lankl

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Abstract

Coherent systems based on QPSK rely on differential encoding to avoid catastrophic error propagation. A simple solution for soft differential decoding is presented that limits the penalty after FEC to 0.75dB, similar to pre-FEC binary differential decoding.
Original languageEnglish
Title of host publicationProceedings of the 36th European Conference and Exhibition on Optical Communication, ECOC 2010, September 19-23, 2010, Torino, Italy
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
PagesTh.9.A.6-1/3
ISBN (Print)978-1-4244-8535-2
Publication statusPublished - 2010

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