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    Multiuser Multihop MIMO Relay System Design Based on Mutual Information Maximization

    202620_202620.pdf (292.7Kb)
    Access Status
    Open access
    Authors
    He, Z.
    Guo, S.
    Ou, Y.
    Rong, Yue
    Date
    2014
    Collection
    • Curtin Research Publications
    Type
    Journal Article
    Metadata
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    Abstract

    In this paper, we consider multiuser multihop relay communication systems, where the users, relays, and the destination node may have multiple antennas. We address the issue of source and relay precoding matrices design to maximize the system mutual information (MI). By exploiting the linkbetween the maximal MI and the weighted minimal mean-squared error (WMMSE) objective functions, we show that the intractable maximal MI-based source and relay optimization problem can be solved via the WMMSE-based source and relay design through an iterative approach which is guaranteed toconverge to at least a stationary point. For the WMMSE problem, we derive the optimal structure of the relay precoding matrices and show that the WMMSE matrix at the destination node can be decomposed into the sum of WMMSE matrices at all hops. Under a (moderately) high signal-to-noise ratio (SNR) condition, this WMMSE matrix decomposition significantly simplifies the solution to the WMMSE problem. Numerical simulations are performed to demonstrate the effectiveness of the proposed algorithm.

    Citation
    He, Z. and Guo, S. and Ou, Y. and Rong, Y. 2014. Multiuser Multihop MIMO Relay System Design Based on Mutual Information Maximization. IEEE Transactions on Signal Processing. 62 (21): pp. 5725-5733.
    Source Title
    IEEE Transactions on Signal Processing
    URI
    http://hdl.handle.net/20.500.11937/17548
    DOI
    10.1109/TSP.2014.2357785
    Department
    Department of Electrical and Computer Engineering
    Remarks

    Copyright © 2014 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.

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