Rate-Adaptation-Based Cooperative Hybrid-ARQ Relaying Scheme in Rayleigh Block-Fading Channels

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We propose to optimize a decode-and-forward (DF) cooperative relaying scheme with Hybrid Automatic-Repeat-reQuest (HARQ) protocol for maximizing long-term average transmission rate (LATR) while satisfying the required maximum number of HARQ rounds and the required outage probability in Rayleigh block-fading channels. We analyze the outage probability and the LATR of the cooperative HARQ relaying scheme for varying placements of a source, a relay, and a destination. We formulate and numerically solve an optimization problem of the cooperative HARQ relaying scheme, which is called the CO-LATR, to maximize the LATR by finding optimal values of parameters: the round transmission rate, transmit power allocation ratio between source and relay, and allowable maximum number of HARQ rounds on the link between source and relay. The CO-LATR outperforms the direct-link HARQ scheme, which does not include a relay and outperforms the cooperative HARQ relaying scheme with the conventional method in terms of the LATR.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2011-11
Language
English
Article Type
Article
Keywords

WIRELESS NETWORKS; PERFORMANCE ANALYSIS; ERROR CONTROL; DIVERSITY; PROTOCOLS; SYSTEM

Citation

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.60, no.9, pp.4640 - 4645

ISSN
0018-9545
DOI
10.1109/TVT.2011.2172008
URI
http://hdl.handle.net/10203/101038
Appears in Collection
EE-Journal Papers(저널논문)
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