Design and Implementation of a Wideband Digital Interpolating Phase Modulator RF Front-End

Jerry Lemberg, Marko Kosunen, Tero Nieminen, Enrico Roverato, Mikko Martelius, Kari Stadius, Jussi Ryynänen, Lauri Anttila, Mikko Valkama

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

    2 Sitaatiot (Scopus)
    15 Lataukset (Pure)

    Abstrakti

    This paper describes implementation details of a digital-intensive phase modulator architecture that does not require a frequency synthesizer to cover a wide carrier frequency range. The phase modulator operation is based on toggling the output accurately during the sample period to generate the phase-modulated signal. The toggling instants within the sample period are calculated by DSP solvers that utilize linear interpolation. The interpolation effectively multiplies the phase signal sample rate by the modulator phase resolution, which enables wider signal bandwidth and a completely digital method of defining the transmitter carrier frequency. The phase modulator concept is verified by implementing it as a part of an outphasing transmitter in 28 nm CMOS. With a constant sample rate of 1.5 GHz and without any predistortion, the transmitter achieves better than -28 dBc ACLR with 100 MHz aggregated LTE downlink signal between 0.8-2.0 GHz carrier frequency.

    AlkuperäiskieliEnglanti
    Otsikko2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018
    KustantajaIEEE
    ISBN (elektroninen)9781538648810
    DOI - pysyväislinkit
    TilaJulkaistu - 26 huhtik. 2018
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaIEEE International Symposium on Circuits and Systems - Florence, Italia
    Kesto: 27 toukok. 201830 toukok. 2018

    Julkaisusarja

    Nimi
    ISSN (elektroninen)2379-447X

    Conference

    ConferenceIEEE International Symposium on Circuits and Systems
    Maa/AlueItalia
    KaupunkiFlorence
    Ajanjakso27/05/1830/05/18

    Julkaisufoorumi-taso

    • Jufo-taso 1

    !!ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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