Title :
Efficient encoding of quasi-cyclic LDPC codes with continuously variable length
Author :
Liu, Lu ; Liu, Lei
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, we present a class of QC-LDPC codes with continuously variable length (CVL), which can be encoded in linear time. The method combines CVL codes [1] with approximate lower triangle structure. Thus the parity-check matrix can achieve girth of 10, and the block length can vary continuously. Significantly, only cyclic-shifting and XOR operations are needed to realize the linear time encoding.
Keywords :
approximation theory; block codes; cyclic codes; linear codes; parity check codes; variable length codes; CVL code; QC-LDPC code; XOR operation; block length; continuously variable length code; cyclic-shifting operation; linear time encoding; lower triangle structure approximation; parity-check matrix; quasicyclic LDPC code; Channel coding; Complexity theory; Matrices; Parity check codes; Registers; Vectors; Continuously variable length; Efficient encoding; Girth; QC-LDPC codes;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4577-1414-6
DOI :
10.1109/CECNet.2012.6202041
