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A non-linear LLR approximation for LDPC decoding over impulsive noise channels

  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The performance of Low-Density Parity-Check codes over symmetric alpha-stable impulsive noise channels is considered in this paper. Due to the lack of closed-form expressions for the probability density functions of almost all the alpha-stable distributions, an efficient non-linear approximation method for channel log-likelihood ratio is presented to achieve high decoding performance covering the range of characteristic exponent from 1 to 2 and avoid the use of complicated numerical integrations. The simulations for both long and short codes show that the parameter selection of the proposed method is not sensitive to the noise level. Even fixed parameter setting for the proposed non-linear approximation can obtain a satisfying decoding performance.

Original languageEnglish
Title of host publication2014 IEEE/CIC International Conference on Communications in China, ICCC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages86-90
Number of pages5
ISBN (Electronic)9781479941469
DOIs
StatePublished - 12 Jan 2015
Event2014 IEEE/CIC International Conference on Communications in China, ICCC 2014 - Shanghai, China
Duration: 13 Oct 201415 Oct 2014

Publication series

Name2014 IEEE/CIC International Conference on Communications in China, ICCC 2014

Conference

Conference2014 IEEE/CIC International Conference on Communications in China, ICCC 2014
Country/TerritoryChina
CityShanghai
Period13/10/1415/10/14

Keywords

  • Impulsive noise
  • LDPC codes
  • Non-linear approximation
  • Symmetric alpha-stable distribution

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