Girth 4 and Low Minimum Weights´ Problems of LDPC Codes in DVB-S2 and Solutions

Author

Huang, Xi ; Fan, Jun ; Xiao, Yang ; Kim, Kiseon

Author_Institution

Inst. of Inf. Sci., Beijing Jiaotong Univ., Beijing, China

fYear

2009

fDate

24-26 Sept. 2009

Firstpage

1

Lastpage

4

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.

Keywords

AWGN channels; digital video broadcasting; direct broadcasting by satellite; error statistics; parity check codes; AWGN channel; BER performance; DVB-S2; LDPC codes; digital video broadcasting satellite second generation; girth-4 code problem; low density parity check codes; lower weight code problem; AWGN channels; Artificial satellites; Bit error rate; Code standards; Communication standards; Digital video broadcasting; Floors; Information science; Parity check codes; Satellite broadcasting;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3692-7

Electronic_ISBN

978-1-4244-3693-4

Type

conf

DOI

10.1109/WICOM.2009.5300880

Filename

5300880