TRACING METER OF APPROACH VELOCITY Russian patent published in 1997 - IPC

FIELD: radars, in particular, radar-based homing missiles. SUBSTANCE: device has mixer 1, which first input is connected to output of intermediate frequency homing missile receiver and serves as device input, intermediate frequency amplifier 2, clipper 3, frequency detector 4, controller 5, controlled heterodyne 6, jam analyzer 7, saw-tooth voltage generator 8, two multipliers 9 and 10, OR gate 11, NOT gate 12. Jam analyzer 7 has two phase detectors 13 and 14, which joint first inputs serves as jam analyzer input, two analog-to-digital converters 15 and 16, two delay lines 17 and 18, two adders 19 and 20, phase shifter 21, unit 22 which provides complex matching and multiplication of signals, correlation unit 23, absolute value calculation unit 24, digital comparator 25, which output is connected to output of jam analyzer 7. In addition device has memory unit 26 and reference heterodyne 27. EFFECT: increased stability to noise due to recognition of antimissile jam and elimination of its lock tracing for Doppler shift. 4 dwg