Digital Predistortion in Large-Array Digital Beamforming Transmitters

Alberto Brihuega, Lauri Anttila, Mahmoud Abdelaziz, Mikko Valkama

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

    13 Sitaatiot (Scopus)
    12 Lataukset (Pure)

    Abstrakti

    In this article, we propose a novel digital predistortion (DPD) solution that allows to considerably reduce the complexity resulting from linearizing a set of power amplifiers (PAs) in single-user large-scale digital beamforming transmitters. In contrast to current state-of-the art solutions that assume a dedicated DPD per power amplifier, which is unfeasible in the context of large antenna arrays, the proposed solution only requires a single DPD in order to linearize an arbitrary number of power amplifiers. To this end, the proposed DPD predistorts the signal at the input of the digital precoder based on minimizing the nonlinear distortion of the combined signal at the intended receiver direction. This is a desirable feature, since the resulting emissions in other directions get partially diluted due to less coherent superposition. With this approach, only a single DPD is required, yielding great complexity and energy savings.
    AlkuperäiskieliEnglanti
    Otsikko2018 52nd Asilomar Conference on Signals, Systems, and Computers
    KustantajaIEEE
    Sivut611-618
    Sivumäärä8
    ISBN (elektroninen)978-1-5386-9218-9
    ISBN (painettu)978-1-5386-9219-6
    DOI - pysyväislinkit
    TilaJulkaistu - lokak. 2018
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS -
    Kesto: 1 tammik. 1900 → …

    Julkaisusarja

    Nimi
    ISSN (painettu)1058-6393

    Conference

    ConferenceASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS
    Ajanjakso1/01/00 → …

    Julkaisufoorumi-taso

    • Jufo-taso 1

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