Patent ID: 6476755
Filing Date: 2002-11-05
Classification: G01S,H04K

Abstract:
An apparatus for alternating the reception of an enemy signal and the transmission of a jamming signal on the same or a different frequency, the repetition rate of the receiving intervals being sufficiently high to allow utilization of the intelligence carried by the received signal while the direction of the received interval is sufficiently short so that the transmitted jamming signal appears continuous to the enemy, said device comprises:first switching means for periodically alternating the intervals in which the receiver is enabled and intelligence is withdrawn from the signal, with the intervals in which the receiver is in a disabled state; second switching means for periodically alternating the intervals in which the transmitter is enabled to jam the enemy signal with the intervals in which the transmitter is disabled so that said first means is enabled when said second means is disabled and said first means is disabled when said second means is enabled; switch control means for operating said first and second switching means above the Nyquist rate of the intelligence used to modulate the radio received signal; and sample and hold means having the demodulated receiver output intelligence signal periodically applied thereto as said receiver is enabled by said first switching means, said sample and hold means operating to effectively reconstruct the intelligence signal used to modulate the signal received by the receiver; and means for controlling said switch control means to continually vary the periods said first and said second switch means are operated to prevent the enemy from knowing or predicting the periods in which the transmitter is disabled.