On the Suitability of Discrete-Time Receivers for Software-Defined Radio

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    Abstract

    Abstract—CMOS radio receiver architectures, based on radio frequency (RF) sampling followed by discrete-time (D-T) signal processing via switched-capacitor circuits, have recently been proposed for dedicated radio standards. This paper explores the suitability of such D-T receivers for highly flexible softwaredefined radio (SDR) receivers. Via symbolic analysis and simulations we analyze the properties of D-T receivers, and show that at least three challenges exist to make a D-T receiver work for SDR: 1) the sampling clock frequency is related to the radio frequency, complicating baseband filter design; 2) a frequency-dependent phase shift is introduced by pseudoquadrature and pseudo-differential sampling; 3) the conversion gain of a charge sampling front-end is strongly frequencydependent. Compared to a mixer based radio receiver, extra costs are needed to solve these problems.
    Original languageEnglish
    Title of host publication2007 IEEE International Symposium on Circuits and Systems
    Place of PublicationPiscataway
    PublisherIEEE
    Pages2522-2525
    Number of pages4
    ISBN (Print)1-4244-0921-7
    DOIs
    Publication statusPublished - 29 May 2007
    EventIEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, United States
    Duration: 27 May 200730 May 2007
    http://www.iscas2007.org/

    Conference

    ConferenceIEEE International Symposium on Circuits and Systems, ISCAS 2007
    Abbreviated titleISCAS 2007
    CountryUnited States
    CityNew Orleans
    Period27/05/0730/05/07
    Internet address

    Keywords

    • EWI-10894
    • IR-58148
    • METIS-241847

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