Title :
Free distance bounds for protograph-based regular LDPC convolutional codes
Author :
Mitchell, David G M ; Pusane, Ali E. ; Goertz, Norbert ; Costello, Daniel J., Jr.
Author_Institution :
Joint Res. Inst. for Signal & Image Process., Univ. of Edinburgh, Edinburgh
Abstract :
In this paper, asymptotic methods are used to form lower bounds on the free distance to constraint length ratio of several ensembles of regular, asymptotically good, protograph-based LDPC convolutional codes. In particular, we show that the free distance to constraint length ratio of the regular LDPC convolutional codes exceeds that of the minimum distance to block length ratio of the corresponding LDPC block codes.
Keywords :
convolutional codes; parity check codes; asymptotic method; constraint length ratio; free distance bound; protograph-based LDPC convolutional code; Block codes; Convolution; Convolutional codes; Equations; Image processing; Parity check codes; Signal processing; Turbo codes;
Conference_Titel :
Turbo Codes and Related Topics, 2008 5th International Symposium on
Conference_Location :
Lausanne
Print_ISBN :
978-1-4244-2862-5
Electronic_ISBN :
978-1-4244-2863-2
DOI :
10.1109/TURBOCODING.2008.4658734
