Title :
Some new results on LT and Raptor codes
Author :
Venkiah, Auguste ; Poulliat, Charly
Author_Institution :
CNRS, ENSEA, Cergy-Pontoise, France
Abstract :
In this paper, some new studies about LT and Raptor codes are presented. Upper and lower bounds on the asymptotic average error probability are derived and they appear quite tight to predict the performance in the error floor region. This study allows to underline the existing trade-off between the asymptotic overhead and the performance in the error floor region. Then, we propose a method to optimize the precode profile for a given LT distribution using a mixture of Gaussian channels.
Keywords :
Gaussian channels; codes; error statistics; Gaussian channels; LT distribution; Raptor codes; asymptotic average error probability; asymptotic overhead; error floor region; Additive white noise; Costs; Error correction codes; Error probability; Feedback; Gaussian approximation; Gaussian channels; Iterative decoding; Optimization methods; Parity check codes;
Conference_Titel :
Wireless Conference (EW), 2010 European
Conference_Location :
Lucca
Print_ISBN :
978-1-4244-5999-5
DOI :
10.1109/EW.2010.5483534
