Secure single sideband communication system using modulated noise subcarrier
US4176316A · kind A · utility
60Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1953 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Mar 30, 1973 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K1/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.