Cryptography – Communication system using cryptography – Wireless communication
Patent
1983-12-19
1989-06-20
Buczinski, Stephen C.
Cryptography
Communication system using cryptography
Wireless communication
380 9, 455102, 455295, 332110, 332 22, 332 41, 375 26, 375 28, 375 34, H04K 110
Patent
active
048415715
ABSTRACT:
A privacy signal transmission system having a transmitter portion and a receiver portion. The transmitter portion digitizes an analog message signal and enciphers the digitized signal into a privacy signal before modulation and transmission to the receiver portion. The transmitter portion also extracts and modulates an analog error signal representative of the digitization error for transmission to the receiver portion. The receiver portion demodulates the digitized privacy signal and analog error signal, and after the privacy signal is deciphered and reconverted to an analog signal it is added to the received analog error to reconstitute the original analog message signal.
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Buczinski Stephen C.
Gregory Bernarr Earl
NEC Corporation
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