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    Multihop Nonregenerative MIMO Relays - QoS Considerations

    150384_150384afd.pdf (359.0Kb)
    Access Status
    Open access
    Authors
    Rong, Yue
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rong, Yue. 2011. Multihop Nonregenerative MIMO Relays - QoS Considerations. IEEE Transactions on Signal Processing. 59 (1): pp. 290-303.
    Source Title
    IEEE Transactions on Signal Processing
    DOI
    10.1109/TSP.2010.2087328
    ISSN
    1053-587X
    School
    Department of Electrical and Computer Engineering
    Remarks

    © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

    URI
    http://hdl.handle.net/20.500.11937/40901
    Collection
    • Curtin Research Publications
    Abstract

    For nonregenerative multihop multiple-input multiple-output (MIMO) relay communication systems, the optimal source precoding matrix and the optimal relay amplifying matrices have been recently established for a broad class of objective functions subjecting to the transmission power constraint at each node. However, existing works do not consider any quality-of-service (QoS) constraints, which are important in practical communication systems. In this paper, we derive the optimal source and relay matrices of a multihop MIMO relay system that guarantee the predetermined QoS criteria be attained with the minimal total transmission power. In particular, we consider two types of receivers at the destination node: the linear minimal mean-squared error (MMSE) receiver and the nonlinear decision feedback equalizer (DFE) based on the MMSE criterion. We show that for both types of receivers, the solution to the original optimization problem can be upper-bounded by using a successive geometric programming (GP) approach and lower-bounded by utilizing a dual decomposition technique. Simulation results show that both bounds are tight, and to obtain the same QoS, the MIMO relay system using the nonlinear MMSE-DFE receiver requires substantially less total transmission power than the linear MMSE receiver-based system.

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