METHOD FOR DETERMINING DIRECTION TO TARGET WITH DIGITAL ANTENNA ARRAY OF MONOPULSE RADAR STATION Russian patent published in 2021 - IPC G01S3/14 G01S13/44 G06N3/02 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering and can be used for simultaneous measurement of two angular coordinates of a target in monopulse radar and radio direction finding systems using digital antenna arrays (AR) or analog AR with digital signal processing. In the claimed method, a reflected signal is received from a direction in the vicinity of a given equal-signal direction by M-antenna elements of a digital antenna array. The received signals in each channel are amplified, transferred to an intermediate frequency, and the complex envelopes are converted into digital form in the form of components of the M-dimensional complex vector of digital samples of the input signals of the digital antenna array. Next, digital samples of the complex signals of the monopulse group of beams are formed by summing the components of the M-dimensional complex vector with the given weight coefficients and normalizing them to the maximum amplitude of digital samples of one of the signals of the monopulse group of beams. After that, normalized digital samples of signals from a monopulse group of rays are transmitted to the input of the neural network with preselected coupling coefficients and displacement of the neural network according to the results of its training according to the criterion of the minimum standard deviation of the output signals of the neural network from the corresponding components of the unit vector p of the direction to the target. As a result, the output signals of the neural network are generated, which correspond to the estimates of the components of the unit vector p of the direction to the target.

EFFECT: increasing the accuracy of determining the direction cosines under the influence of noise when expanding the spatial range of measurements by the monopulse method.

1 cl, 5 dwg, 2 tbl