Nonbinary LDPC-coded modulation for rate-adaptive optical fiber communication Without bandwidth expansion

Murat Arabaci, Ivan B. Djordjevic, Lei Xu, Ting Wang

Research output: Contribution to journalArticle

17 Scopus citations


A rate-adaptive nonbinary low-density parity-check-coded modulation scheme is proposed to enable fiber-optic transmission at variable bit rates by adjusting the spectral efficiency (SE) of transmission while keeping the occupied bandwidth fixed. To achieve a given SE within a fixed bandwidth, both the underlying signal constellation size and the forward error correction code rate are adjusted. Using the scarce resource of bandwidth more effectively, the proposed scheme is expected to find applications in both current fixed-grid networks and in future networks that might adopt flexible grid approach.

Original languageEnglish (US)
Article number6218753
Pages (from-to)1402-1404
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number16
StatePublished - Aug 8 2012



  • Forward error correction (FEC)
  • nonbinary low-density parity-check (LDPC) codes
  • optical fiber communication
  • rate-adaptive coded modulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this