Digital predistortion for mitigating transmitter-induced receiver desensitization in carrier aggregation FDD transceivers

Mahmoud Abdelaziz, Lauri Anttila, Mikko Valkama

    Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

    Abstrakti

    In frequency division duplexing (FDD) transceivers, the intermodulation distortion (IMD) created by a nonlinear transmit power amplifier can easily interfere with the receiver (RX) band. This is a particular concern in various carrier aggregation scenarios, and can cause severe own RX desensitization. In this paper, a spur-injection based sub-band digital predistortion (DPD) solution is proposed to mitigate this problem. Compared to earlier works, the proposed DPD parameter learning is performed using the main RX of the device, and thus it does not require an extra observation RX, which implies reduced costs and size. The proposed DPD is tested using computer simulations with practical models for the transmitter (TX) power amplifier and the TX/RX duplexer filters. The TX-induced IMD is suppressed by up to 25 dB at the own RX band, demonstrating a significant improvement in the RX signal-to-interference-and-noise-ratio (SINR).
    AlkuperäiskieliEnglanti
    OtsikkoProceedings of IEEE Global Conference on Signal and Information Processing
    JulkaisupaikkaWashington, DC
    KustantajaIEEE
    Sivut694-698
    ISBN (elektroninen)978-1-5090-4544-0
    DOI - pysyväislinkit
    TilaJulkaistu - 7 jouluk. 2016
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaIEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING -
    Kesto: 1 tammik. 1900 → …

    Conference

    ConferenceIEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING
    Ajanjakso1/01/00 → …

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