TY - GEN
T1 - A new construction of irregular LDPC convolutional codes with cycle removal
AU - Wu, Chi Jen
AU - Wang, Chung-Hsuan
AU - Chao, Chi Chao
PY - 2010/12/1
Y1 - 2010/12/1
N2 - In this paper, a new construction of irregular low-density parity-check convolutional codes (LDPC-CCs) is presented. Both upper and lower bounds on the free distance are derived as well. Compared with previously constructed irregular LDPC-CCs, our design can not only avoid a girth less than 8 but also provide an enlarged free distance. Since some undesired cycles occur due to the binomial terms in the parity-check matrices of general LDPC-CCs, we provide a specific procedure to remove this kind of length-8 cycles. It can also be applied to our irregular construction. Simulation results show that the codes based on the new construction and the cycle-removal procedure can achieve better bit-error-rate performance and a lower error-floor.
AB - In this paper, a new construction of irregular low-density parity-check convolutional codes (LDPC-CCs) is presented. Both upper and lower bounds on the free distance are derived as well. Compared with previously constructed irregular LDPC-CCs, our design can not only avoid a girth less than 8 but also provide an enlarged free distance. Since some undesired cycles occur due to the binomial terms in the parity-check matrices of general LDPC-CCs, we provide a specific procedure to remove this kind of length-8 cycles. It can also be applied to our irregular construction. Simulation results show that the codes based on the new construction and the cycle-removal procedure can achieve better bit-error-rate performance and a lower error-floor.
UR - http://www.scopus.com/inward/record.url?scp=78651338803&partnerID=8YFLogxK
U2 - 10.1109/ISITA.2010.5650164
DO - 10.1109/ISITA.2010.5650164
M3 - Conference contribution
AN - SCOPUS:78651338803
SN - 9781424460175
T3 - ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
SP - 507
EP - 512
BT - ISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
T2 - 2010 20th International Symposium on Information Theory and Its Applications, ISITA 2010 and the 2010 20th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2010
Y2 - 17 October 2010 through 20 October 2010
ER -