Girth 4 and low minimum weights' problems of LDPC codes in DVB-S2 and solutions

Authors:
Xi Huang;Jun Fan;Yang Xiao;Kiseon Kim
Affiliations:
Institute of Information Science, Beijing Jiaotong University, Beijing, China;Office of Academic Affairs, Minzu University of China, Beijing, China;Institute of Information Science, Beijing Jiaotong University, Beijing, China;Dept. of Information and Communications, Gwangju Institute of Science and Technology, Gwangju, Korea
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

Citing 3
Cited 0

Design LDPC codes without cycles of length 4 and 6

Research Letters in Communications - Regular issue
Good error-correcting codes based on very sparse matrices

IEEE Transactions on Information Theory
Low-density parity-check codes based on finite geometries: a rediscovery and new results

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.00

Visualization

Abstract

Though LDPC codes have been accepted by DVB-S2, the LDPC encode of DVB-S2 (Digital Video Broadcasting Satellite Second Generation) are difficult to be implemented for their huge code lengths of 16200 bits and 64800 bits). To shorten the codes will lead the problems of girth-4 and lower weight codes. This paper analyzed the possible reasons leading to the problems, and revised the current code construction of DVB-S2. The simulation results in the AWGN channel show that the BER performance of the improved LDPC codes is much better than that of the former shorten codes.