Title :
Raptor codes for hybrid error-erasure channels with memory
Author :
Cao, Yu ; Blostein, Steven D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ, Kingston, ON
Abstract :
Raptor codes are a class of rateless codes which have been used as application layer forward error correction (FEC) codes for broadcasting over wireless channels. Raptor codes provide promising performance in both erasure channels and noisy channels. This paper investigates the transmission of Raptor codes over hybrid error-erasure channels with and without memory. Performance of Raptor codes over binary symmetric channels with erasures (BSCE) is analyzed. It has been found that the average overhead of Raptor codes is independent of the erasure rate of BSCE channels. Simulation results of BER performance also show similar behavior. When channel memory is considered, performance of Raptor codes over Gilbert-Elliott (GE) channels is investigated via simulation. The results show that memory degrades the performance of Raptor codes whether or not channel state information is available.
Keywords :
channel coding; forward error correction; wireless channels; FEC codes; Gilbert-Elliott channels; Raptor codes; binary symmetric channels with erasures; forward error correction codes; hybrid error-erasure channels; wireless channels; Decoding; Digital multimedia broadcasting; Digital video broadcasting; Error correction codes; Forward error correction; Multimedia communication; Parity check codes; Wireless LAN; Wireless application protocol; Wireless communication;
Conference_Titel :
Communications, 2008 24th Biennial Symposium on
Conference_Location :
Kingston, ON
Print_ISBN :
978-1-4244-1945-6
Electronic_ISBN :
978-1-4244-1946-3
DOI :
10.1109/BSC.2008.4563211
