A Software-Defined Radio Receiver Architecture Robust to Out-of-Band Interference

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    Abstract

    In a software-defined radio (SDR) receiver it is desirable to minimize RF band-filtering for flexibility, size and cost reasons, but this leads to increased out-of-band interference (OBI). Besides harmonic and intermodulation distortion (HD/IMD), OBI can also lead to blocking and harmonic mixing. A wideband LNA [1, 2] amplifies signal and interference with equal gain. Even a low gain of 6dB can clip 0dBm OBI to a 1.2V supply, blocking the receiver. Hard-switching mixers not only translate the wanted signal to baseband but also the interference around LO harmonics. Harmonic rejection (HR) mixers have been used [3, 1, 4], but are sensitive to phase and gain mismatch. Indeed the HR in [4] shows a large spread, whereas other work only shows results from one chip [3, 1]. This paper describes techniques to relax blocking and HD/IMD, and make HR robust to mismatch.
    Original languageEnglish
    Title of host publicationIEEE International Solid-State Circuits Conference
    Place of PublicationPiscataway
    PublisherIEEE Computer Society Press
    Pages232-233
    Number of pages2
    ISBN (Print)978-1-4244-3458-9
    DOIs
    Publication statusPublished - 8 Feb 2009
    EventIEEE International Solid-State Circuits Conference, ISSCC 2009 - San Francisco, United States
    Duration: 8 Feb 200912 Feb 2009

    Conference

    ConferenceIEEE International Solid-State Circuits Conference, ISSCC 2009
    Abbreviated titleISSCC
    CountryUnited States
    CitySan Francisco
    Period8/02/0912/02/09

    Keywords

    • METIS-263872
    • IR-65508
    • EWI-15404

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  • Cite this

    Ru, Z., Klumperink, E. A. M., Wienk, G. J. M., & Nauta, B. (2009). A Software-Defined Radio Receiver Architecture Robust to Out-of-Band Interference. In IEEE International Solid-State Circuits Conference (pp. 232-233). Piscataway: IEEE Computer Society Press. https://doi.org/10.1109/ISSCC.2009.4977392