Cognitive radios for dynamic spectrum access - Polyphase Multipath Radio Circuits for Dynamic Spectrum Access

Eric A.M. Klumperink, R. Shrestha, E. Mensink, V.J. Arkesteijn, Bram Nauta

    Research output: Contribution to journalArticleAcademicpeer-review

    21 Citations (Scopus)
    67 Downloads (Pure)

    Abstract

    ABSTRACT Dynamic access of unused spectrum via a cognitive radio asks for flexible radio circuits that can work at an arbitrary radio frequency. This article reviews techniques to realize radios without resorting to frequency selective dedicated filters. In particular, a recently proposed polyphase multipath technique canceling harmonics and sidebands is discussed. Using this technique, a wideband and flexible power upconverter with a clean output spectrum has been realized on a CMOS chip, aiming at flexible radio transmitter application. Prototype chips can transmit at an arbitrary frequency between DC and 2.4 GHz. Unwanted harmonics and sidebands are more than 40 dB lower than the desired signal up to the 17th harmonic of the transmit frequency.
    Original languageEnglish
    Pages (from-to)104-112
    Number of pages9
    JournalIEEE communications magazine
    Volume45
    Issue number5
    DOIs
    Publication statusPublished - 1 May 2007

    Keywords

    • EWI-10326
    • IR-58144
    • METIS-241711

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