Efficiency comparison of LDPC-LDGM and Raptor codes for PL-FEC with very large block sizes

Author

Gutiérrez, Rafael Montalbán ; Seco-Granados, Gonzalo

Author_Institution

Signal Process. for Commun. & Navig. Group (SPCOMNAV), Univ. Autonoma de Barcelona (UAB), Barcelona

fYear

2009

fDate

22-24 April 2009

Firstpage

1

Lastpage

6

Abstract

In this paper the performance of LDPC-LDGM codes and Raptor codes is studied and compared in terms of efficiency. LDPC-LDGM and Raptor are FEC codifications that can be applied at packet level. PL-FEC consists in including redundant packets in the transmission to ensure correct reception. Although these techniques have been previously studied in the literature, they have usually been compared with the performance of small block Reed Solomon codes. This paper presents a novel comparison between the performance of LDPC-LDGM codes and Raptor codes as alternatives for packet level FEC when large codification blocks are needed. The results obtained show that Raptor codes clearly outperform LDPC-LDGM codes in almost all scenarios.

Keywords

block codes; error correction codes; forward error correction; parity check codes; LDPC-LDGM code; PL-FEC; Raptor code; low density generator matrix; low density parity check code; packet-level forward-error correction; redundant packet; very large block size; Automatic repeat request; Communication standards; Digital video broadcasting; Fading; Parity check codes; Reed-Solomon codes; Satellite broadcasting; Satellite communication; Signal processing; Telecommunication standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Telecommunications Symposium, 2009. WTS 2009

Conference_Location

Prague

ISSN

1934-5070

Print_ISBN

978-1-4244-2588-4

Electronic_ISBN

1934-5070

Type

conf

DOI

10.1109/WTS.2009.5068986

Filename

5068986