Patent
1953-03-30
1979-11-27
Birmiel, Howard A.
179 15R, 325 34, 325 49, 325 63, 325321, 325444, H04K 102
Patent
active
041763165
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.
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Polkingham et al., "A Single-Sideband Short-Wave System" etc., (Bell System Mongraph B-872), Proc. IRE, vol. 23, pp. 701-718, Jul. 1935.
deRosa Louis A.
Rogoff Mortimer
Birmiel Howard A.
International Telephone & Telegraph Corp.
O'Halloran John T.
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