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    Joint source and relay design for two-hop amplify-and-forward relay networks with QoS constraints

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    Access Status
    Open access
    Authors
    Mohammadi, J.
    Gao, F.
    Rong, Yue
    Chen, W.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Mohammadi, Jafar and Gao, Feifei and Rong, Yue and Chen, Wen. 2013. Joint source and relay design for two-hop amplify-and-forward relay networks with QoS constraints. EURASIP Journal on Wireless Communications and Networking. 2013 (108): pp. 1-13.
    Source Title
    EURASIP Journal on Wireless communications and networking
    DOI
    10.1186/1687-1499-2013-108
    ISSN
    16871499
    Remarks

    This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by-nc-nd/2.0/. Please refer to the licence to obtain terms for any further reuse or distribution of this work.

    URI
    http://hdl.handle.net/20.500.11937/35605
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we consider the joint design of source precoding matrix and the relay precoding matrix in a two-hop multiple-input multiple-output relay network. The goal is to find a pair of matrices in order to minimize the power consumption and at the same time meet pre-selected quality of service constraints that are defined as the mean square error of each data stream. Using majorization theory, we simplify the matrix-valued optimization problem into a scalar-valued one. We then propose a lower bound and an upper bound of the original problem, both in convex forms. Specifically, the latter is solved by a multi-level water-filling algorithm that is much efficient than directly applying the interior point method. Numerical examples corroborate the proposed studies and also demonstrate the tightness of both bounds to the original problem.

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