DocumentCode :
744287
Title :
Spatially Coupled LDPC Codes Constructed by Parallelly Connecting Multiple Chains
Author :
Liu, Yang ; Li, Ying ; Chi, Yuhao
Volume :
19
Issue :
9
fYear :
2015
Firstpage :
1472
Lastpage :
1475
Abstract :
A particular class of spatially coupled low-density parity-check (SC-LDPC) codes are constructed by parallelly connecting multiple different coupled chains. The connection structure is realized by edge exchanges between adjacent chains, which can help these chains support each other and improve the iterative decoding thresholds. By varying the number of the connected chains and the degree of each chain, a family of SC-LDPC codes with wide rate range can be obtained. Density evolution analysis shows that the decoding thresholds of the proposed codes are very close to Shannon limits and are slightly better than that constructed by a single chain over the binary erasure channel.
Keywords :
Complexity theory; Convolutional codes; Couplings; Design methodology; Iterative decoding; Joining processes; Spatially coupled LDPC codes; density evolution; iterative decoding thresholds;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2015.2448090
Filename :
7130575
Link To Document :
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