Secure communication system with improved frequency-hopping arrangement
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United States of America Patent
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Jun 30, 1981
Grant Date -
N/A
app pub date -
Oct 2, 1978
filing date -
Oct 2, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A signal scrambling system of the type in which the frequencies of the information signal band are inverted by heterodyning the information signal with a varying beat frequency. In accordance with the invention the beat frequency varies in a sequence of small increments which, in their totality, provide large overall frequency excursions and which, individually, are sufficiently small to avoid the generation of unduly strong spurious signals within the information signal band.
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