Wideband Digital Downconverters for Synthetic Instrumentation

    Authors

    M. T. Hunter; W. B. Mikhael;A. G. Kourtellis

    Comments

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    Abstract

    In this paper, we introduce a new wideband digital downconverter (WDDC) for synthetic instruments (SIs). DDCs first tune to a signal's center frequency using a numerically controlled oscillator and mixer and then zoom-in to the bandwidth of interest using sample rate conversion (SRC). The SRC is required to produce continuously variable output sample rates from a fixed input sample rate over a large range. Current implementations accomplish this using a prefilter, an arbitrary factor resampler, and integer decimation filters. In this paper, we simplify the SRC of the WDDC, yielding a reduction in computational cost by a factor of 3 or more.

    Journal Title

    Ieee Transactions on Instrumentation and Measurement

    Volume

    58

    Issue/Number

    2

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    263

    Last Page

    269

    WOS Identifier

    WOS:000262428800005

    ISSN

    0018-9456

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