Secure single sideband communication system using modulated noise subcarrier
USRE34004E · kind E · reissue
10Cited by
12References
19Claims
0Family size
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Key dates
| Filing date | Aug 15, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Aug 15, 2010 |
Classification
- Technology area (CPC —)General
Abstract
10. A transmitter for a secret communication system comprising a source of carrier frequency energy, a source of cyclically repetitive noise energy, means to synchronize the cyclical repetition rate of said noise energy with a sub-multiple of the frequency of said carrier frequency energy, means to reverse the phase of portions of said noise energy in accordance with a predetermined message code, means to modulate said carrier frequency energy with said encoded noise energy and means to transmit the suppressed carrier single sideband component of said carrier modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.