Efficient ARQ schemes with multiple copy decoding

Author

Kallel, Samir ; Leung, Cyril

Author_Institution

Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada

Volume

40

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

642

Lastpage

650

Abstract

Several modifications of an efficient automatic repeat request (ARQ) scheme proposed by Weldon (see IEEE Trans. Commun., vol.COM-30, p.480, 1982) are studied. Unlike Weldon´s scheme, in which all erroneous data packets are discarded, the present schemes make use of copies of the data packet which may contain errors. A number of channel models are considered, namely, a binary symmetric channel, a nonfading, and a Rayleigh fading channel with additive white Gaussian noise. In most cases, it is found that the throughput can be substantially increased. Under poor channel conditions, the use of forward error correction can lead to further improvement. A type-II ARQ scheme which does not suffer the throughput degradation under good channel conditions due to overhead parity bits associated with conventional forward error correction is also analyzed

Keywords

decoding; error correction codes; fading; telecommunication channels; white noise; Rayleigh fading channel; additive white Gaussian noise; automatic repeat request; binary symmetric channel; channel models; data packets; forward error correction; multiple copy decoding; overhead parity bits; throughput; type-II ARQ scheme; Additive white noise; Automatic repeat request; Buffer storage; Decoding; Degradation; Fading; Forward error correction; Throughput; Transmitters; Welding;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.135735

Filename

135735