Title :
On the role of puncturing in hybrid ARQ schemes
Author :
Liu, Ruoheng ; Spasojevic, Predrag ; Soljanin, Emina
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers Univ., Piscataway, NJ, USA
fDate :
29 June-4 July 2003
Abstract :
In mobile packet data transmission, a special coding/retransmission scheme, known as the type-II hybrid-ARQ (HARQ), achieves higher throughput efficiency then fixed rate codes by adapting their rate to fluctuating channel conditions characteristic for this application. Codes of different rates are obtained by puncturing a chosen low-rate "mother" code. We introduce the notion of random puncturing as a tool to evaluate the performance of punctured codes averaged over a class of puncturing patterns. We illustrate the power of this tool by comparing the throughput performance of an HARQ scheme based on optimized rate compatible puncturing with the throughput performance of an HARQ scheme based on random rate compatible puncturing of the same mother turbo code.
Keywords :
AWGN channels; automatic repeat request; channel coding; error statistics; maximum likelihood decoding; packet radio networks; phase shift keying; turbo codes; HARQ; channel condition; mobile packet data transmission; mother code; punctured codes; random puncturing; turbo code; type-II hybrid-ARQ; AWGN channels; Automatic repeat request; Block codes; Data communication; Decoding; Information theory; Parity check codes; Throughput; Turbo codes; Upper bound;
Conference_Titel :
Information Theory, 2003. Proceedings. IEEE International Symposium on
Print_ISBN :
0-7803-7728-1
DOI :
10.1109/ISIT.2003.1228466
