DocumentCode :
972824
Title :
On the Construction of Quasi-Systematic Block-Circulant LDPC Codes
Author :
Xu, Ying ; Wei, Guo
Author_Institution :
Univ. of Sci. & Technol. of China, Hefei
Volume :
11
Issue :
11
fYear :
2007
fDate :
11/1/2007 12:00:00 AM
Firstpage :
886
Lastpage :
888
Abstract :
A class of quasi-systematic block-circulant LDPC (QSBC-LDPC) Codes is proposed. The parity-check matrix of a QSBC-LDPC code is a sparse block-circulant matrix with a quasi-systematic structure. Due to the special structure of the parity-check matrix, only limited memories, XOR computations and cyclic-shifting operations are needed in the recursive encoding process of the QSBC-LDPC codes. Simulations show that the QSBC-LDPC codes provide remarkable performance improvement with low encoding complexity.
Keywords :
block codes; encoding; matrix algebra; parity check codes; recursive estimation; XOR; memories; parity-check matrix; quasi-systematic block-circulant LDPC codes; quasi-systematic structure; recursive encoding; sparse block-circulant matrix; Computational modeling; Decoding; Encoding; Information science; Lattices; Parity check codes; Sparse matrices;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2007.071022
Filename :
4381377
Link To Document :
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