The modulator is designed to use digital multiplying integrated circuits to produce the frequency shift rather than analog mixers. By replacement of the analog RF hardware with digital circuitry, the size and weight of an avionics device in an aircraft can be reduced. The circuit also employs a digital Hilbert transform filter to shift the phase of the incoming signal by 90 degrees. The circuit was tested with simulated S-band radar signals ranging from 3.012 to 3.038 GHz. The circuit, running in double-sideband mode, proved its ability to shift the frequencies of the radar signals by amounts in the range of -25 to +25 kHz. All spurious outputs of the system were found to be more than 28 dB below the carrier.


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    Titel :

    A digital single sideband modulator for a digital radio frequency memory


    Weitere Titelangaben:

    Ein digitaler Einseitenbandmodulator fuer einen digitalen Funkfrequenz-Speicher


    Beteiligte:
    Foltz, T.M. (Autor:in) / Cook, G.W. (Autor:in) / Meer, D.E. (Autor:in)


    Erscheinungsdatum :

    1989


    Format / Umfang :

    7 Seiten, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Design and Performance of the Bidirectional Optical Single-Sideband Modulator

    Loayssa, A. / Lim, C. / Nirmalathas, A. et al. | British Library Online Contents | 2003


    Frequency-Shifting Submillimeter Single-Sideband Receiver

    Mueller, E. R. | British Library Online Contents | 1994