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    Source and Relay Matrices Optimization for Multiuser Multi-Hop MIMO Relay Systems

    Access Status
    Fulltext not available
    Authors
    Rong, Yue
    Date
    2011
    Type
    Conference Paper
    
    Metadata
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    Citation
    Rong, Yue. 2011. Source and Relay Matrices Optimization for Multiuser Multi-Hop MIMO Relay Systems, in International Conference on Wireless Communications and Signal Processing, Nov 9 2011. Nanjing, China: IEEE.
    Source Title
    Proceedings of The 2011 International Conference on Wireless Communications and Signal Processing
    Source Conference
    The 2011 International Conference on Wireless Communications and Signal Processing
    DOI
    10.1109/WCSP.2011.6096806
    ISBN
    978-1-4577-1010-0
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/23747
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we consider multiaccess communication through multi-hop linear non-regenerative relays, where all users, all relay nodes, and the destination node may have multiple antennas. We design the user, relay, and destination matrices that jointly minimize the mean-squared error (MSE) of the signal waveform estimation. It is shown that the optimal amplifying matrix at each relay node can be viewed as a linear minimal MSE filter concatenated with another linear filter. As a consequence, the MSE matrix of the signal waveform estimation at the destination node is decomposed into the sum of the MSE matrices at all relay nodes. We show that at a high signal-to-noise ratio (SNR) environment, this MSE matrix decomposition significantly simplifies the solution to the problem of optimizing the user andrelay matrices. Simulation results show that even at the low to medium SNR range, the simplified optimization algorithms have only a marginal performance degradation but a greatly reduced computational complexity and signalling overhead compared with the existing optimal iterative algorithm, and thus are of great interest for practical relay systems.

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