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Multi-round Belief Propagation Decoding with Impulsive Perturbation for Short LDPC Codes
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- Authors
- Hyunjae Lee, Yong-Sung Kil, Min Jang, Sang-Hyo Kim, Ok-Sun Park, Giyoon Park
- Issue Date
- 2020-09
- Citation
- IEEE Wireless Communications Letters, v.9, no.9, pp.1491-1494
- ISSN
- 2162-2337
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- The belief propagation (BP) decoding of short low-density parity check codes suffers from short cycles and trapping sets. A number of perturbation schemes have been proposed to overcome the limitation. This letter presents a generalized framework for multi-round BP decoding with input perturbation and proposes an improved perturbation scheme. In particular, the impulsive perturbation which is applied to only a few symbols is proposed, along with a new space selection criterion. The proposed scheme performs better than existing schemes for short codes at lower complexity and supports a parallel implementation.
- KSP Keywords
- Belief propagation decoding, Existing schemes, Generalized framework, LDPC Codes, Low Density Parity Check(LDPC), Parallel implementation, Parity check codes, Perturbation scheme, Selection criterion, Short codes, Short cycles