DocumentCode
745902
Title
Density evolution for two improved BP-Based decoding algorithms of LDPC codes
Author
Chen, Jinghu ; Fossorier, Marc P C
Author_Institution
Dept. of Electr. Eng., Hawaii Univ., Honolulu, HI, USA
Volume
6
Issue
5
fYear
2002
fDate
5/1/2002 12:00:00 AM
Firstpage
208
Lastpage
210
Abstract
In this letter, we analyze the performance of two improved belief propagation (BP) based decoding algorithms for LDPC codes, namely the normalized BP-based and the offset BP-based algorithms, by means of density evolution. The numerical calculations show that with one properly chosen parameter for each of these two improved BP-based algorithms, performances very close to that of the BP algorithm can be achieved. Simulation results for LDPC codes with code length moderately long validate the proposed optimization.
Keywords
AWGN channels; belief maintenance; block codes; iterative decoding; LDPC codes; belief propagation based decoding algorithms; density evolution; iterative decoding; low-density parity-check codes; normalized BP-based algorithms; numerical calculations; offset BP-based algorithms; Algorithm design and analysis; Belief propagation; Convergence; Degradation; Iterative algorithms; Iterative decoding; Parity check codes; Performance analysis; Random variables; Sum product algorithm;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/4234.1001666
Filename
1001666
Link To Document