DIGITAL DEVICE FOR DOPPLER PROCESSING OF QUADRATURE PULSE VIDEOSIGNALS Russian patent published in 2000 - IPC

FIELD: radio engineering. SUBSTANCE: proposed digital device for Doppler processing of quadrature pulse videosignals includes units of direct discrete Fourier transform and unit of inverse discrete Fourier transform, unit of digital formation of single-band pulse videosignal. Technical result of proposal consists in double expansion of range of unambiguous measurement of speed of target and direction of its travel ( Doppler frequency and its sign ) on constant repetition frequency up to repetition frequency as other existing devices provide for range of unambiguous measurement of speed of target and direction of its travel to half of repetition frequency only in correspondence with known stroboscopic effect on video frequency. Digital single-band videosignal can be formed directly in process of direct discrete Fourier transform. Given device eliminates " blind " phases without traditional quadrature processing. Device is serviceable even under condition of wobbling of repetition frequency. EFFECT: double expansion of range of unambiguous measurement of speed of target and direction of its travel. 2 cl, 6 dwg