METHOD FOR DETERMINING RANGE AND RADIAL SPEED OF TARGET USING PULSE-DOPPLER RADAR STATION Russian patent published in 2023 - IPC G01S13/04 G01S13/58 

FIELD: radar technology.

SUBSTANCE: invention can be used in pulsed radar stations for detecting and tracking targets with active phased array antennas and digital antenna arrays. In the claimed method, a sequence M of probing pulses is emitted, which is formed in the form of three or more groups of pulses with repetition periods where g=1, 2,…,G, G is the number of pulse groups; f _D is a given sampling frequency, N_g is an integer number of range elements between probing pulses in a group with index g, integer values of N_g are chosen in such a way that the greatest common divisor of numbers for possible combinations of pairs N₁, N₂, …, N_G is minimal. The signals at the output of the receiving device are recorded in the form of a sequence of complex digital samples converted into a matrix of complex digital samples so that each row corresponds to complex digital samples of the received signal between adjacent probing pulses, and each column corresponds to the same delay time of the reflected signals in each of the M probing pulses. The noise level in the matrix of complex digital samples is estimated. Consistent filtering of complex digital samples with a probing signal is performed, forming a data matrix; a fast Fourier transform is performed in each column of the data matrix, forming a body matrix of the uncertainty function. The power of the signal component is determined in the signal-to-noise ratio and a decision is made on target detection by comparison with a threshold value when it is exceeded. The range to the target and the radial speed of the target are estimated using the Doppler frequency.

EFFECT: expanded range of unambiguous measurement of radial velocity.

1 cl, 6 dwg, 1 tbl