Next generation FEC for high-capacity communication in optical transport networks

Ivan B. Djordjevic, Murat Arabaci, Lyubomir L. Minkov

Research output: Contribution to journalArticlepeer-review

219 Scopus citations


Codes on graphs of interest for next generation forward error correction (FEC) in high-speed optical networks, namely turbo codes and low-density parity-check (LDPC) codes, are described in this invited paper. We describe both binary and nonbinary LDPC codes, their design, and decoding. We also discuss an FPGA implementation of decoders for binary LDPC codes. We then explain how to combine multilevel modulation and channel coding optimally by using coded modulation. Also, we describe an LDPC-coded turbo-equalizer as a candidate for dealing simultaneously with fiber nonlinearities, PMD, and residual chromatic dispersion.

Original languageEnglish (US)
Article number4907117
Pages (from-to)3518-3530
Number of pages13
JournalJournal of Lightwave Technology
Issue number16
StatePublished - Aug 15 2009


  • Coded modulation
  • Codes on graphs
  • Fiber-optics communications
  • Low-density parity-check (LDPC) codes
  • Turbo equalization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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