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
fDate :
11/1/2007 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.071022
