Protograph-based Raptor-like LDPC codes with low thresholds

Author

Chen, Tsung-Yi ; Divsalar, Dariush ; Wesel, Richard D.

Author_Institution

Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA

fYear

2012

fDate

10-15 June 2012

Firstpage

2161

Lastpage

2165

Abstract

This paper presents a new construction of punctured-node protograph-based Raptor-like (PN-PBRL) codes that is suitable for long-blocklength applications. As with the Raptor codes, additional parity bits can be easily produced by exclusive-OR operations on the precoded bits, providing extensive rate compatibility. The new construction provides low iterative decoding thresholds that are within 0.45 dB of the capacity for all code rates studied, and the construction is suitable for long blocklengths. Comparing at the same information block size of k = 16368 bits, the PN-PBRL codes are as good as the best known AR4JA codes in the waterfall region. The PN-PBRL codes also perform comparably to DVB-S2 LDPC codes even though the DVBi-S2 codes have longer blocklength and outer BCH codes.

Keywords

block codes; iterative decoding; parity check codes; AR4JA codes; DVB-S2 LDPC codes; DVBi-S2 codes; PN-PBRL codes; exclusive-OR operations; extensive rate compatibility; information block size; long-block length applications; low iterative decoding thresholds; outer BCH codes; protograph-based Raptor-like LDPC codes; punctured-node protograph-based Raptor-like codes; waterfall region; word length 16368 bit; Bit error rate; Decoding; Digital video broadcasting; Iterative decoding; Optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2012 IEEE International Conference on

Conference_Location

Ottawa, ON

ISSN

1550-3607

Print_ISBN

978-1-4577-2052-9

Electronic_ISBN

1550-3607

Type

conf

DOI

10.1109/ICC.2012.6363996

Filename

6363996