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    On the performance of hybrid-ARQ with incremental redundancy and with code combining over relay channels

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    Type
    Article
    Authors
    Chelli, Ali
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Communication Theory Lab
    Date
    2013-08
    Permanent link to this record
    http://hdl.handle.net/10754/562890
    
    Metadata
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    Abstract
    In this paper, we consider a relay network consisting of a source, a relay, and a destination. The source transmits a message to the destination using hybrid automatic repeat request (HARQ). The relay overhears the transmitted messages over the different HARQ rounds and tries to decode the data packet. In case of successful decoding at the relay, both the relay and the source cooperate to transmit the message to the destination. The channel realizations are independent for different HARQ rounds. We assume that the transmitter has no channel state information (CSI). Under such conditions, power and rate adaptation are not possible. To overcome this problem, HARQ allows the implicit adaptation of the transmission rate to the channel conditions by the use of feedback. There are two major HARQ techniques, namely HARQ with incremental redundancy (IR) and HARQ with code combining (CC). We investigate the performance of HARQ-IR and HARQ-CC over a relay channel from an information theoretic perspective. Analytical expressions are derived for the information outage probability, the average number of transmissions, and the average transmission rate. We illustrate through our investigation the benefit of relaying. We also compare the performance of HARQ-IR and HARQ-CC and show that HARQ-IR outperforms HARQ-CC. © 2013 IEEE.
    Citation
    Chelli, A., & Alouini, M.-S. (2013). On the Performance of Hybrid-ARQ with Incremental Redundancy and with Code Combining over Relay Channels. IEEE Transactions on Wireless Communications, 12(8), 3860–3871. doi:10.1109/twc.2013.042313.121235
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Wireless Communications
    DOI
    10.1109/TWC.2013.042313.121235
    ae974a485f413a2113503eed53cd6c53
    10.1109/TWC.2013.042313.121235
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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