Title :
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
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;
Conference_Titel :
Wireless Telecommunications Symposium, 2009. WTS 2009
Conference_Location :
Prague
Print_ISBN :
978-1-4244-2588-4
Electronic_ISBN :
1934-5070
DOI :
10.1109/WTS.2009.5068986
