MODE OF MEASURING A RADIAL SPEED OF A TARGET BY RADAR Russian patent published in 2005 - IPC

FIELD: radiolocation technique namely radars for determination of coordinates of targets.

SUBSTANCE: mode is based on regeneration, modulation and radiation of radio impulses integrated in time with an identical period of repetition on carrier frequencies f₁ and f_2, simultaneous transformation of the frequency of indicated radio impulses into reference signal of differential frequency Δf_r= f₂ -_{f1, reception of signals reflected by the target on frequency f1 +Fd1 and f2+Fd2, transformation of signals from the target into signals Δf + ΔFd, where Δf - signal of differential frequency, ΔFd - Doppler amendment to differential frequency. At that succession is formed from N reference coherent signals, each of which has a phase shift in intervals 0-2π on discrete Δψn in relation to reference coherent signal of differential frequency, phases of transformed signal of the target is compared with formed reference coherent signals, N results are compared according to the amplitude with beforehand preset threshold and transformed into parallel numeric code corresponding the speed of the target.}

EFFECT: increases speed of operations of radar at determination of radial speed of a target.

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