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An Improved Decoding Algorithm for Finite-Geometry LDPC Codes
Yueguang BIAN Youzheng WANG Jing WANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E90-B
No.4
pp.978-981 Publication Date: 2007/04/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.4.978 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Fundamental Theories for Communications Keyword: belief propagation (BP), feedback BP (FBP), low-density parity-check (LDPC) codes, iterative decoding, finite-geometry LDPC,
Full Text: PDF(254.9KB)>>
Summary:
In this letter, we propose a new modification to the belief propagation (BP) decoding algorithm for Finite-Geometry low-density parity-check (LDPC) codes. The modification is based on introducing feedback into the iterative process, which can break the oscillations of bit log-likelihood ratio (LLR) values. Simulations show that, with a given maximum iteration, the "feedback BP" (FBP) algorithm can achieve better performance than the conventional belief propagation algorithm.
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