Title :
Feedback in LT Codes for Prioritized and Non-Prioritized Data
Author :
Sørensen, Jesper H. ; Popovski, Petar ; Østergaard, Jan
Author_Institution :
Dept. of Electron. Syst., Aalborg Univ., Aalborg, Denmark
Abstract :
In this paper feedback in LT codes is investigated. The considered type of feedback is acknowledgments, where information on which symbols have been decoded is given to the transmitter. Our analysis reveals that acknowledgments has a very low potential in LT codes with standard degree distributions. Motivated by this, we analyze the impact of acknowledgments on multi-layer LT codes. In this case, feedback proves advantageous. By using only a single feedback message, it is possible to achieve a significant performance improvement compared to traditional LT codes.
Keywords :
channel coding; codes; multilayer LT codes; nonprioritized data; standard degree distribution; Decoding; Encoding; Iterative decoding; Receivers; Redundancy; Standards; Transmitters;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6399292
