Dynamic and Flexible Spectrum Use with Frequency Localized Waveforms under Transmitter Nonidealities

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    Filter bank multicarrier (FBMC) is considered as one of the strong 5G waveform candidates due to better spectral containment compared to orthogonal frequency division multiplexing (OFDM). However, when considering the spectral leakage effects appearing in practical devices due to transmitter non-idealities, such as power amplifier (PA) nonlinearity and inphase-quadrature (I/Q) imbalance, the nice spectral properties of FBMC may be severely degraded, thus questioning the additional complexity needed to generate such waveforms in baseband. In this paper, digital pre-distortion (DPD) is investigated as a practical solution for both of these problems. We extend the study also to potential applications of spectrum sensing based cognitive radio in future wireless communications. We utilize the benefits of the analysis filter bank of FBMC receiver in wideband multichannel spectrum sensing. In this context, the power leakage due to transmitter non-idealities also makes it difficult to identify spectral gaps amongst relatively strong primary transmissions. It is demonstrated that effective DPD greatly facilitates both spectrum sensing and spectrum utilization functions and thus enhances the overall spectral efficiency in opportunistic dynamic spectrum use scenarios.
    Original languageEnglish
    Title of host publication2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall)
    PublisherIEEE
    ISBN (Print)978-1-4799-8091-8
    DOIs
    Publication statusPublished - 2015
    Publication typeA4 Article in a conference publication
    EventIEEE Vehicular Technology Conference -
    Duration: 1 Jan 1900 → …

    Conference

    ConferenceIEEE Vehicular Technology Conference
    Period1/01/00 → …

    Publication forum classification

    • Publication forum level 1

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