NDLI: Simple cooperative ARQ protocols with selective amplify-and-forward relaying

Content Provider	IEEE Xplore Digital Library
Author	Chun-Kai Tseng Sau-Hsuan Wu
Copyright Year	2009
Description	Author affiliation: Department of Communication Engineering, National Chiao Tung University, Hsinchu, Taiwan (Chun-Kai Tseng; Sau-Hsuan Wu)
Abstract	Simple cooperative automatic retransmission request (ARQ) protocols are presented based on the selective amplified-and-forward (SAF) relaying method. Analysis shows that the temporal diversity of ARQs can be exploited with AF relaying only if the channel quality to the relay exceeds a threshold that depends on the source data rate requirement. Based on this analysis, an effective ARQ protocol is first developed from the concept of selective relaying to attain the full temporal diversity. Moreover, the notion of SAF relaying is further extended to systems with multiple relays to exploit the spatial and temporal diversities, incorporating the mechanism of opportunistic relaying. Two types of opportunistic-selective AF (OSAF) relaying methods are thus proposed for cooperative ARQs. Analysis shows that both OSAF protocols can offer much higher diversities than ARQ schemes with the typical AF relaying method. And the throughput of ARQs with OSAF is more robust to the variations of channel qualities and is close to their decode-and-forward counterparts.
Starting Page	325
Ending Page	329
File Size	369239
Page Count	5
File Format	PDF
ISBN	9781424451227
e-ISBN	9781424451234
DOI	10.1109/PIMRC.2009.5450075
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-13
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Automatic repeat request Protocols Relays Decoding Throughput Robustness Channel state information Phase noise Feedback Array signal processing cooperative ARQ and opportunistic relaying Selective amplified-and-forward
Content Type	Text
Resource Type	Article

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