MANNER TO SUPPRESS PASSIVE JAMMING AND DEVICE FOR ITS REALIZATION Russian patent published in 2004 - IPC

FIELD: radio engineering. SUBSTANCE: invention can be used in coherent-pulse radars for detection and tracking of moving objects against background of passive jamming with unknown correlation properties and in air traffic control systems. Technical result of invention lies in enhanced efficiency of rejection of passive jamming with synthesizing of class of multichannel rejection filters of n- orders based on m-channel expansion of vector H. Third channel (m=3) is inserted to raise efficiency of rejection of jamming by means of double-channel devices with n≥4. It allows efficiency of multichannel rejection filter to be enhanced by 6 to 9 dB. Efficiency of rejection of jamming with multichannel rejection filters is close to theoretically optimal rejection filters of single-channel type. Main point of invention consists in that multichannel adaptive rejection filter includes five storages, first adder, first storage circuit, first divider, first multiplier and second adder connected in series. Output of first adder is connected to second input of second adder, inputs of first, second, third, fourth and fifth storages are connected to proper inputs of first adder. Adaptive rejection filter also has third adder and second storage circuit connected in series. Output of second storage circuit is connected to second input of first divider, inputs of third adder are integrated with input and output of third storage of filter, output of third adder is connected to second input of first multiplier. EFFECT: enhanced efficiency of rejection of passive jamming. 4 dwg