DEVICE FOR SUPPRESSION OF NARROW BAND JAMMING Russian patent published in 1998 - IPC

FIELD: pulse signal receiving equipment. SUBSTANCE: device has matched filter, narrow-band suppression filter, jamming analyzer and adder. Goal of invention is achieved by introduced controlled amplifier and controlled phase shifter. Inputs of matched filter, narrow-band suppression filter, jamming analyzer are joined and connected to device input. Output of matched filter is connected to first input of adder, which second input is connected to output of narrow-band suppression filter through serial circuit of controlled amplifier and controlled phase shifter. Output of analyzer is connected to control inputs of narrow-band suppression filter controlled amplifier and controlled phase shifter. Dependency of controlled amplifier gain on jamming frequency conforms to condition . Dependency of phase shift of controlled phase shifter on jamming frequency conforms to condition , where -1 ≤ X ≤ 1 is normalized jamming frequency, T1 is signal duration, T2 is duration of pulse response of narrow-band suppression filter, W0 is signal frequency. EFFECT: increased stability to noise. 1 dwg