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US4179657A Expired / Lapsed US ⏱️ 0.0 years remaining

Anti-jamming communication system

Assignee: United States Department of the Air Force
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Filing: 1958-08-28
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Granted: 1979-12-18
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Expires: 1978-08-28
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Abstract

Abstract 1. A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said setting of channels, and means to successively reset the frequency and delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving successive enciphered message digital bits until said message is completely transmitted.

Inventors

  • 👤 Charles F. Hobbs

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 22:29
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/20; H04K3/25; H04K1/00; H04K3/28; H04K3/60; H04K3/65; H04K3/68; H04K3/80; H04K3/82; H04K3/827

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 157 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel and transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said setting of channels, and means to successively reset the frequency and delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving successive enciphered message digital bits until said message is completely transmitted.
Claim 2
Independent Claim 157 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel and transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said setting of channels, and means to successively reset the frequency and delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving successive enciphered message digital bits until said message is completely transmitted.
Claim 3
Independent Claim 175 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted.
Claim 4
Independent Claim 175 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted.
Claim 5
Independent Claim 213 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive said multiple transmissions of digital bits, means to set and reset said receiving multi-channels in a manner corresponding to said transmitting channels, and means to synchronize in time said transmitting and said receiving means.
Claim 6
Independent Claim 213 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive said multiple transmissions of digital bits, means to set and reset said receiving multi-channels in a manner corresponding to said transmitting channels, and means to synchronize in time said transmitting and said receiving means.
Claim 7
Independent Claim 248 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving sad enciphered time and address digits, means to convet a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive said multiple transmissions of digital bits, means to set and reset said receiving multi-channels in a manner corresponding to said transmitting channels, means to synchronize in time said transmitting and said receiving means, and means to re-establish communications between said transmitter and said receiver when a message is intercepted in the process of transmission, wherein said means includes a provision to initiate said uncompleted message from its very inception.
Claim 8
Independent Claim 248 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving sad enciphered time and address digits, means to convet a message to be transmitted into digital bits, means to encipher said message digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive said multiple transmissions of digital bits, means to set and reset said receiving multi-channels in a manner corresponding to said transmitting channels, means to synchronize in time said transmitting and said receiving means, and means to re-establish communications between said transmitter and said receiver when a message is intercepted in the process of transmission, wherein said means includes a provision to initiate said uncompleted message from its very inception.
Claim 9
Independent Claim 185 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive said enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, and multi-channel means for multiple transmission of dummy message digit bits simultaneously with said message digital bits.
Claim 10
Independent Claim 185 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels, said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means for multiple transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive said enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, and multi-channel means for multiple transmission of dummy message digit bits simultaneously with said message digital bits.
Claim 11
Independent Claim 248 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for redundant transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive transmissions of said message digital bits, means to set and reset said receiving channels in a manner corresponding to said transmitting channels, means to synchronize in time said transmitting and said receiving means, transmitting means located at said multi-channel receiving means to acknowledge receipt of a transmitted message, and means located at said transmitter to receive said acknowledgement transmission and thereupon initiate a message to some other intended destination.
Claim 12
Independent Claim 248 words
A system of communications to an intended destination in a manner to elude detection by unauthorized sources, and to prevent jamming, which comprises multi-channel transmitting means, each of said channel transmitting means having a different frequency and delay, said frequency and delay being variable, means to generate time and address digits, means to encipher said time and address digits, means to initially set the frequencies and delays in each of said transmitting channels said setting means receiving said enciphered time and address digits, means to convert a message to be transmitted into digital bits, means to encipher said message digital bits, means for redundant transmission of the initial message digital bit after said initial setting of said transmitting channels, means to successively reset the frequency and time delay in each of said transmitting channels after said multiple transmission of said first message digital bit, said resetting means receiving said successive enciphered message digital bits, each of said message digital bits being transmitted in multiple upon each of said resettings until said message is completely transmitted, multi-channel means to receive transmissions of said message digital bits, means to set and reset said receiving channels in a manner corresponding to said transmitting channels, means to synchronize in time said transmitting and said receiving means, transmitting means located at said multi-channel receiving means to acknowledge receipt of a transmitted message, and means located at said transmitter to receive said acknowledgement transmission and thereupon initiate a message to some other intended destination.

References Cited (Backward Citations)

US2709218A Cited
US2510338A Cited
US2517587A Cited
US2720557A Cited
US2923764A Cited
US2952735A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-12-17 1983-06-18 1983-12-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-12-17 1987-06-18 1987-12-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-12-17 1991-06-18 1991-12-18 $7700.00 Window Closed / Lapsed

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