NDLI: Repetition protocols and channel state information in block-fading channels

Content Provider	IEEE Xplore Digital Library
Author	Tuninetti, D.
Copyright Year	2008
Description	Author affiliation: Univ. of Illinois, Chicago, IL (Tuninetti, D.)
Abstract	In today's networks, error correction is achieved by a combination of FEC (forward error correction) and ARQ (automatic repetition request). In classical repetition protocols, a receiver requests a retransmission in case FEC-decoding fails. In this work we revise and summarize our recent results that show the benefits of using the retransmission request bit(s) not only to request a retransmission, but also to inform coarsely the transmitter about the actual channel condition. Our goal is to simultaneously enable the performance gain due to retransmission and to power control at the transmitter. We give an explicit protocol construction for any number of retransmissions and any number of feedback bits, and show remarkable throughput improvements, especially at low and moderate SNR (signal to noise ratio). For the case of a single retransmission and a single feedback bit, we show that the repetition is not needed at low SNR and that the throughput improvement is due to power control only, which allows to turn off transmission when the channel is in deep fade. On the other hand, at high SNR, the repetition turns out to be useful, and the performance gain comes form a combination of power control and ability to send more redundancy bits through repetition.
Starting Page	18
Ending Page	21
File Size	212829
Page Count	4
File Format	PDF
ISBN	9781424416813
DOI	10.1109/IZS.2008.4497266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-12
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Channel state information Forward error correction Power control Signal to noise ratio Transmitters Performance gain Feedback Throughput Automatic repeat request
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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