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    Joint Terminals and Relay Optimization for Two-way Power Line Information Exchange Systems with QoS Constraints

    Access Status
    Fulltext not available
    Authors
    Wu, X.
    Rong, Yue
    Date
    2015
    Type
    Journal Article
    
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    Citation
    Wu, X. and Rong, Y. 2015. Joint Terminals and Relay Optimization for Two-way Power Line Information Exchange Systems with QoS Constraints. Eurasip Journal on Advances in Signal Processing. 2015.
    Source Title
    Eurasip Journal on Advances in Signal Processing
    ISSN
    1687-6172
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/23915
    Collection
    • Curtin Research Publications
    Abstract

    The quality-of-service (QoS) criteria (measured in terms of the minimum capacity requirement in this paper) are very important to practical indoor power line communication (PLC) applications as they greatly affect the user experience. With a two-way multicarrier relay configuration, in this paper we investigate the joint terminals and relay power optimization for the indoor broadband PLC environment, where the relay node works in the amplify-and-forward (AF) mode. As the QoS-constrained power allocation problem is highly non-convex, the globally optimal solution is computationally intractable to obtain. To overcome this challenge, we propose an alternating optimization (AO) method to decompose this problem into three convex/quasi-convex sub-problems. Simulation results demonstrate the fast convergence of the proposed algorithm under practical PLC channel conditions. Compared with the conventional bidirectional direct transmission (BDT) system, the relay-assisted two-way information exchange (R2WX) scheme can meet the same QoS requirement with less total power consumption.

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