Title :
LDPC code design for OOK modulated Poisson optical channels
Author :
Tingjun Xie ; Wilson, Stephen G. ; Brandt-Pearce, Maite ; Brown, C.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Virginia, Charlottesville, VA, USA
Abstract :
The Poisson channel is a popular direct-detection model in optical communication. In this paper, we study efficient data communication over the on-off keyed (OOK) modulated Poisson channel. We first analyze the channel capacity, and based on the analysis we study the application of low-density parity-check (LDPC) codes on such channels. The asymmetric density evolution (ADE) method is used to determine the decoding threshold of an LDPC ensemble, and it is demonstrated that optimized LDPC ensembles have near-capacity performance, for various code rates. We also point out that the robustness of LDPC codes for the Poisson channel, i.e. a certain optimized LDPC ensemble remain (essentially) optimal over a wide range of channel conditions, making LDPC codes an attractive forward correcting coding (FEC) scheme for optical communication.
Keywords :
Poisson distribution; amplitude shift keying; data communication; decoding; forward error correction; parity check codes; ADE; FEC; LDPC code design; OOK modulation; Poisson optical channels; asymmetric density evolution; channel capacity; data communication; decoding threshold; direct-detection model; forward correcting coding; low-density parity-check codes; on-off keyed modulation; optical communication; optimized LDPC ensemble; Channel capacity; Channel models; Decoding; Noise level; Optical fiber communication; Parity check codes; Robustness; LDPC robustness; Poisson channel; asymmetric density evolution; on-off keying (OOK);
Conference_Titel :
Information Sciences and Systems (CISS), 2013 47th Annual Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4673-5237-6
Electronic_ISBN :
978-1-4673-5238-3
DOI :
10.1109/CISS.2013.6552291
