A 50MHz-to-1.5GHz Cross-Correlation CMOS Spectrum Analyzer for Cognitive Radio with 89dB SFDR in 1MHz RBW

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    Abstract

    Abstract Spectrum sensing for cognitive radio requires a high linearity to handle strong signals, and at the same time a low noise figure (NF) to enable detection of much weaker signals. Often there is a trade-off between linearity and noise: improving one of them degrades the other. Cross-correlation can break this trade-off by reducing noise at the cost of measurement time. An existing RF front-end in CMOS-technology with IIP3=+11dBm and NF<6.5dB is duplicated and attenuators are put in front to increase linearity (IIP3=+24dBm). The attenuation degrades NF, but by using cross-correlation of the outputs of the two frontends, the NF is reduced to below 4dB. In total this results in a spurious-free dynamic range (SFDR) of 89dB in 1MHz resolution bandwidth (RBW).
    Original languageEnglish
    Title of host publicationIEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks (DySPAN 2010)
    Place of PublicationPiscataway
    PublisherIEEE
    Number of pages6
    ISBN (Print)978-1-4244-5188-3
    DOIs
    Publication statusPublished - 7 Apr 2010

    Keywords

    • METIS-275579
    • EWI-17808
    • IR-73469

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