Patent ID: 7532856

Claim:
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.