LDPC-coded OFDM for optical communication systems with direct detection

Ivan B. Djordjevic, Bane Vasic, Mark A. Neifeld

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Low-density parity-check (LDPC) coded orthogonal frequency division multiplexing (OFDM) is proposed as an efficient coded modulation technique suitable for optical communication systems. We show that in long-haul fiber optics communications, LDPC-coded OFDM increases spectral efficiency, and reduces the influence of residual chromatic dispersion and the influence of fiber nonlinearities. LDPC-coded OFDM is as also a promising polarization-mode dispersion (PMD) compensation technique. In free space optical communications, LDPC-coded OFDM improves the immunity to the atmospheric turbulence; while in multimode fiber links, it reduces the influence of intermodal dispersion. In plastic optical fiber links it reduces the influence of dispersion and helps to overcome the bandwidth limitations. Several power efficient OFDM schemes and LDPC codes suitable for use in LDPC-coded OFDM optical communication systems are introduced.

Original languageEnglish (US)
Pages (from-to)1446-1454
Number of pages9
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number5
StatePublished - Sep 2007


  • Fiber optics communications
  • Free space optical communications
  • Graded-index plastic optical fiber links
  • Low-density parity-check (LDPC) codes
  • Optical communications
  • Orthogonal frequency division multiplexing (OFDM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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