Mr. Jinsong Xiang Profile

Jinsong Xiang

at Chongqing Univ of Posts and Telecommunications

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Proceedings Article | 7 October 2016 Paper

Adaptive channel estimation for soft decision decoding over non-Gaussian optical channel

Jing-song Xiang, Tao-tao Miao, Sheng Huang, Huan-lin Liu

Proceedings Volume 9902, 990208 (2016) https://doi.org/10.1117/12.2262328

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An adaptive priori likelihood ratio (LLR) estimation method is proposed over non-Gaussian channel in the intensity modulation/direct detection (IM/DD) optical communication systems. Using the nonparametric histogram and the weighted least square linear fitting in the tail regions, the LLR is estimated and used for the soft decision decoding of the low-density parity-check (LDPC) codes. This method can adapt well to the three main kinds of intensity modulation/direct detection (IM/DD) optical channel, i.e., the chi-square channel, the Webb-Gaussian channel and the additive white Gaussian noise (AWGN) channel. The performance penalty of channel estimation is neglected.

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