System employs electronically randomized variant of quadraphase modulation and demodulation between two synchronized transceivers. System uses off-the-shelf components. It may be used with digital data, command signals, delta-modulated voice signals, digital television signals, or other data converted to digital form.


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    Title :

    Secure communications system


    Contributors:

    Published in:

    Publication date :

    1977-09-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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