DocumentCode
3761250
Title
Simplified LLR calculation for DVB-S2 LDPC decoder
Author
Vanessa B. Olivatto;Renato R. Lopes;Eduardo R. de Lima
Author_Institution
Department of Hardware Design Eldorado Research Institute, Campinas, Brazil, School of Electrical and Computer Engineering University of Campinas, Campinas, Brazil
fYear
2015
Firstpage
26
Lastpage
31
Abstract
The computation of the Log-Likelihood Ratio (LLR) at the channel output may impose great demand of memory and hardware area, especially for high-order modulations. This paper introduces a new approach for the approximation of the LLR in AWGN channels based on the splitting of the original constellation into smaller sectors. Each new sector has a less complex configuration in which it is possible to take into account only two symbols besides the received one. The proposed solution is applied for the 8-PSK and 16-APSK constellations adopted in the Digital Video for Satellite Second Generation standard (DVBS2).
Keywords
"Parity check codes","Modulation","Satellites","Conferences","Hardware","Decoding","Mathematical model"
Publisher
ieee
Conference_Titel
Communication, Networks and Satellite (COMNESTAT), 2015 IEEE International Conference on
Type
conf
DOI
10.1109/COMNETSAT.2015.7434300
Filename
7434300
Link To Document