TY - GEN
T1 - Combined optimization scheme for degree distributions of LDPC codes
AU - Park, Jin Soo
AU - Song, Min Kyu
AU - Song, Hong Yeop
PY - 2013
Y1 - 2013
N2 - In this paper, we propose an optimization scheme for degree distributions of LDPC codes that combines differential evolution and iterative simplex algorithm. In the proposed scheme, we find good check and variable nodes degree distribution and threshold by using differential evolution, and then, we further optimize check and variable nodes degree distribution that has enhanced code rate by using an iterative simplex algorithm. An iterative simplex algorithm consists of two simplex algorithms, optimizing ρ(x) and λ(x), respectively and iteratively. Some simulation results show that the proposed scheme finds degree distributions, better than those obtained by the differential evolution only, in terms of threshold and/or code rate. As an application of the proposed scheme, we report some new degree distributions with some new maximum degrees.
AB - In this paper, we propose an optimization scheme for degree distributions of LDPC codes that combines differential evolution and iterative simplex algorithm. In the proposed scheme, we find good check and variable nodes degree distribution and threshold by using differential evolution, and then, we further optimize check and variable nodes degree distribution that has enhanced code rate by using an iterative simplex algorithm. An iterative simplex algorithm consists of two simplex algorithms, optimizing ρ(x) and λ(x), respectively and iteratively. Some simulation results show that the proposed scheme finds degree distributions, better than those obtained by the differential evolution only, in terms of threshold and/or code rate. As an application of the proposed scheme, we report some new degree distributions with some new maximum degrees.
UR - http://www.scopus.com/inward/record.url?scp=84902357251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84902357251&partnerID=8YFLogxK
U2 - 10.1109/APCC.2013.6765996
DO - 10.1109/APCC.2013.6765996
M3 - Conference contribution
AN - SCOPUS:84902357251
SN - 9781467360500
T3 - 2013 19th Asia-Pacific Conference on Communications, APCC 2013
SP - 485
EP - 489
BT - 2013 19th Asia-Pacific Conference on Communications, APCC 2013
PB - IEEE Computer Society
T2 - 2013 19th Asia-Pacific Conference on Communications, APCC 2013
Y2 - 29 August 2013 through 31 August 2013
ER -