Regenerative jammer with multiple jamming algorithms
First Claim
1. A jammer for controlling RF transmission in a local area, where the local area may have at least one transmitter and at least one transmitter and where the local transmitters transmit local RF transmissions to the local receivers comprising:
- an antenna unit for receiving jammer received signals from the RF transmissions of local transmitters and for transmission of RF jammer transmitter signals to the local receivers,a receive-unit for converting the jammer received signals to form converted received signals,a transmit-unit for converting generated signals to form the RF jammer transmitter signals,a control unit operating with a plurality of control algorithms including,a regeneration algorithm operating with a regeneration sequence including,turning off the jammer transmitter signals and enabling receipt of the jammer received signals during a non-transmit period,recording a sample of the jammer received signals during a record period of duration N occurring during said non-transmit period,playing back said sample to form a playback signal,at least one alternation algorithm operating to alter said playback signal to generate said generated signals asynchronously with respect to ones of said jammer received signals whereby timing characteristics of the RF jammer transmitter signals are independent of timing characteristics of said jammer received signals.
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Accused Products
Abstract
A jammer for generating and transmitting RF broadband jamming signals for jamming one or more local RF receivers. The jammer includes a broadband antenna unit for receiving broadband RF jammer received signals from local transmitters and for transmission of regenerated broadband RF jamming signals to the local receivers. The jammer uses a plurality of jamming algorithms including a regeneration algorithm and one or more alteration algorithms that alter the regenerated signals whereby the altered regenerated signals are asynchronous with respect to ones of, or all of, the jammer received signals. The alteration algorithms include a chopping algorithm and an FM modulation algorithm.
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Citations
25 Claims
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1. A jammer for controlling RF transmission in a local area, where the local area may have at least one transmitter and at least one transmitter and where the local transmitters transmit local RF transmissions to the local receivers comprising:
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an antenna unit for receiving jammer received signals from the RF transmissions of local transmitters and for transmission of RF jammer transmitter signals to the local receivers, a receive-unit for converting the jammer received signals to form converted received signals, a transmit-unit for converting generated signals to form the RF jammer transmitter signals, a control unit operating with a plurality of control algorithms including, a regeneration algorithm operating with a regeneration sequence including, turning off the jammer transmitter signals and enabling receipt of the jammer received signals during a non-transmit period, recording a sample of the jammer received signals during a record period of duration N occurring during said non-transmit period, playing back said sample to form a playback signal, at least one alternation algorithm operating to alter said playback signal to generate said generated signals asynchronously with respect to ones of said jammer received signals whereby timing characteristics of the RF jammer transmitter signals are independent of timing characteristics of said jammer received signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A jamming system having a plurality of jammers for controlling RF transmission in a local area where the local area receives broadcast jammer synchronization signals from synchronizing transmitters, where the local area has at least one transmitter and at least one transmitter and where the local transmitters transmit local RF transmissions to the local receivers comprising:
each of said jammers including; a broadband antenna unit for receiving jammer received signals from the RF transmissions of local transmitters and for transmission of RF jammer transmitter signals to the local receivers, a broadband receive-unit including an A/D converter for converting the jammer received signals to form converted received signals, a broadband transmit-unit including a D/A converter for converting generated signals to form the RF jammer transmitter signals, a control unit operating with a plurality of control algorithms including, a regeneration algorithm operating with a regeneration sequence including, turning off the jammer transmitter signals and enabling receipt of the jammer received signals during a non-transmit period, recording a sample of the jammer received signals during a record period N occurring during said non-transmit period, playing back said sample to form a playback signal, an alteration algorithm operating to alter said playback signal to generate said generated signals asynchronously with respect to ones of said jammer received signals whereby timing characteristics of the RF jammer transmitter signals are independent of timing characteristics of said jammer received signals; a synchronization receiver for receiving the broadcast jammer synchronization signals and providing a received synchronization signal to said control unit for periodically synchronizing said non-transmission period. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A method of jamming RF transmission in a local area, where the local area may have at least one transmitter and at least one transmitter and where the local transmitters transmit local RF transmissions to the local receivers comprising:
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receiving jammer received signals from the RF transmissions of local transmitters and transmitting RF jammer transmitter signals to the local receivers, converting the jammer received signals to form converted received signals, converting generated signals to form the RF jammer transmitter signals, controlling operation with a plurality of control algorithms including, a regeneration algorithm operating with a regeneration sequence including, turning off the jammer transmitter signals and enabling receipt of the jammer received signals during a non-transmit period, recording a sample of the jammer received signals during a record period N occurring during said non-transmit period, playing back said sample to form a playback signal, an alteration algorithm operating to alter said playback signal to generate said generated signals asynchronously with respect to ones of said jammer received signals whereby timing characteristics of the RF jammer transmitter signals are independent of timing characteristics of said jammer received signals. - View Dependent Claims (25)
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Specification