Title
Multi-layer hybrid-ARQ for an out-of-band relay channel.
Abstract
This paper addresses robust communication on a fading relay channel in which the relay is connected to the decoder via an out-of-band digital link of limited capacity. Both the source-to-relay and the source-to-destination links are subject to fading gains, which are generally unknown to the encoder prior to transmission. To overcome this impairment, a hybrid automatic retransmission request (HARQ) protocol is combined with multi-layer broadcast transmission, thus allowing for variable-rate decoding. Moreover, motivated by cloud radio access network applications, the relay operation is limited to compress-and-forward. The aim is maximizing the throughput performance as measured by the average number of successfully received bits per channel use, under either long-term static channel (LTSC) or short-term static channel (STSC) models. In order to opportunistically leverage better channel states based on the HARQ feedback from the decoder, an adaptive compression strategy at the relay is also proposed. Numerical results confirm the effectiveness of the proposed strategies.
Year
DOI
Venue
2013
10.1109/PIMRC.2013.6666278
PIMRC
Keywords
DocType
Volume
channel capacity,automatic repeat request,radio broadcasting,channel coding
Journal
abs/1303.4782
ISSN
Citations 
PageRank 
2166-9570
0
0.34
References 
Authors
10
4
Name
Order
Citations
PageRank
Seokhwan Park177966.40
Osvaldo Simeone23574264.99
Onur Sahin335325.02
Shlomo Shamai44531410.89