Abstract: An electronic counter-measure system for installation on an aircraft is disclosed. The system includes an interferometer transmitter comprised of a plurality of repeater amplifier circuits connected in parallel arrangement. A pair of receiving antennas on the aircraft senses an incoming radar signal when the aircraft is being tracked by a fire control radar and initiates the operation of the plurality of repeater amplifier circuits in such a manner that they generate out of phase radio signals of different amplitudes which are respectively transmitted by associated spaced transmitting antennas on the aircraft. These radio signals induce a time varying tilt in the wavefront of the echo signal being returned to the tracking radar with the result that the radar indicates apparent aircraft angular accelerations that capture the radar tracking servo and tax the dynamic stability of the elements in the intercept loop, particularly the missile.

Abstract: Waveforms received at a transmitter antenna are Fourier transformed to extract waveform spectrums. These spectrums are enhanced so as to provide near uniform pulse spectrum sidelobe amplitudes. These enhanced side lobe waveforms are then Fourier transformed. The result is conversion of received waveform time domain discontinuities into impulses. The energy in the received waveform is retained. The conversion to impulses provides processing gain. Correlation processing exploits finite differences in both spectrum and impulse conversion characteristic of radar targets, jamming and clutter.