|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
An Efficient Weighted Bit-Flipping Algorithm for Decoding LDPC Codes Based on Log-Likelihood Ratio of Bit Error Probability
Tso-Cho CHEN Erl-Huei LU Chia-Jung LI Kuo-Tsang HUANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E100-B
No.12
pp.2095-2103 Publication Date: 2017/12/01
Online ISSN: 1745-1345 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: low-density parity-check codes, weighted bit-flipping, multiple bit-flipping, decoding algorithm, log-likelihood ratio, convergence speed,
Full Text: PDF(1.5MB) >>Buy this Article
Summary:
In this paper, a weighted multiple bit flipping (WMBF) algorithman for decoding low-density parity-check (LDPC) codes is proposed first. Then the improved WMBF algorithm which we call the efficient weighted bit-flipping (EWBF) algorithm is developed. The EWBF algorithm can dynamically choose either multiple bit-flipping or single bit-flipping in each iteration according to the log-likelihood ratio of the error probability of the received bits. Thus, it can efficiently increase the convergence speed of decoding and prevent the decoding process from falling into loop traps. Compared with the parallel weighted bit-flipping (PWBF) algorithm, the EWBF algorithm can achieve significantly lower computational complexity without performance degradation when the Euclidean geometry (EG)-LDPC codes are decoded. Furthermore, the flipping criterion does not require any parameter adjustment.
|
|