Title :
Noise-predictive BCJR equalization for suppression of intrachannel nonlinearities
Author :
Djordjevic, Ivan B. ; Vasic, Bane
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ
fDate :
6/1/2006 12:00:00 AM
Abstract :
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
Keywords :
equalisers; iterative methods; optical fibre communication; optical filters; parity check codes; prediction theory; superradiance; telecommunication channels; BCJR equalizer; Bahl-Cocke-Jelinek-Raviv algorithm; amplified spontaneous emission noise; colored noise; intrachannel nonlinearity suppression; iterative equalization scheme; iterative low-density parity-check decoder; noise-predictive filter; optical filtering; Colored noise; Equalizers; Filtering; High speed optical techniques; Iterative algorithms; Nonlinear optics; Optical filters; Optical noise; Spontaneous emission; Stimulated emission; Bahl–Cocke–Jelinek–Raviv (BCJR) algorithm; low-density parity-check (LDPC) codes; noise-predictive filter; optical communications;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.876757
