Noise-predictive BCJR equalization for suppression of intrachannel nonlinearities

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10 Scopus citations


An iterative equalization scheme for suppressing intrachannel nonlinearities in high-speed optical transmission systems operating at 40 Gb/s is presented. The proposed method employs a noise-predictive filter to mitigate the colored noise due to amplified spontaneous emission noise and optical filtering. The maximum a posteriori probability symbol detection implemented as the Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm is employed to suppress the intrachannel nonlinear effects. Soft decision outputs provided by the noise-predictive BCJR equalizer are processed by an iterative low-density parity-check decoder.

Original languageEnglish (US)
Pages (from-to)1317-1319
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number12
StatePublished - Jun 15 2006


  • Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm
  • Low-density parity-check (LDPC) codes
  • Noise-predictive filter
  • Optical communications

ASJC Scopus subject areas

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


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