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    Polynomial expansion of the precoder for power minimization in large-scale MIMO systems

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    Type
    Conference Paper
    Authors
    Sifaou, Houssem cc
    Kammoun, Abla cc
    Sanguinetti, Luca
    Debbah, Merouane
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2016-07-26
    Online Publication Date
    2016-07-26
    Print Publication Date
    2016-05
    Permanent link to this record
    http://hdl.handle.net/10754/621364
    
    Metadata
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    Abstract
    This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power consumption while ensuring target user rates. As most precoding schemes, a major difficulty towards the implementation of OLP is that it requires fast inversions of large matrices at every new channel realizations. To overcome this issue, we aim at designing a linear precoding scheme providing the same performance of OLP but with lower complexity. This is achieved by applying the truncated polynomial expansion (TPE) concept on a per-user basis. To get a further leap in complexity reduction and allow for closed-form expressions of the per-user weighting coefficients, we resort to the asymptotic regime in which M and K grow large with a bounded ratio. Numerical results are used to show that the proposed TPE precoding scheme achieves the same performance of OLP with a significantly lower implementation complexity. © 2016 IEEE.
    Citation
    Sifaou H, Kammoun A, Sanguinetti L, Debbah M, Alouini M-S (2016) Polynomial expansion of the precoder for power minimization in large-scale MIMO systems. 2016 IEEE International Conference on Communications (ICC). Available: http://dx.doi.org/10.1109/ICC.2016.7510948.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    2016 IEEE International Conference on Communications (ICC)
    Conference/Event name
    2016 IEEE International Conference on Communications, ICC 2016
    DOI
    10.1109/ICC.2016.7510948
    ae974a485f413a2113503eed53cd6c53
    10.1109/ICC.2016.7510948
    Scopus Count
    Collections
    Conference Papers; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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