METHOD OF SIMULATING RADAR TARGETS Russian patent published in 2015 - IPC G01S7/38 

FIELD: radio engineering, communication.

SUBSTANCE: method of simulating radar targets, based on receiving, by a relay station, probing signals of a space synthetic-aperture radar station s_p(t), amplifying said signals, shifting the carrier frequency f₀ to an intermediate frequency f_if, filtering, analogue-to-digital conversion with a sampling interval δτ, recording the obtained sequence of digital samples s_pi=s_p((i-1)δτ), filtering, amplifying the relayed radar signals and emission thereof towards the space synthetic-aperture radar station, further specifying the number of false marks N formed on the radar image, vectors of geocentric coordinates of points on the earth's surface corresponding to the position of the n-th false mark x_fn=[x_fn,y_fn,z_fn], where $$n=\overline{\mathrm{1,}N},$$ and the amplitude transfer coefficient of the signal of the n-th false mark a_n∈[0;1], calculating for each p-th probing the current distance between the space synthetic-aperture radar station and each of the N points on the earth's surface, corresponding to the position of the false marks R_{l pn}, and the distance between the space synthetic-aperture radar station and the relay station R_rp, specifying the pulse modulation law in the form of a sequence of digital samples of the mark at the p-th probing, reading the i-th sample of the p-th probing pulse s_pi through a time interval τ_r, multiplying said sample with the corresponding reading of the modulating frequency M_pi, converting the obtained sequence of digital samples of the products s_piM_pi into an analogue relayed pulse and shifting its frequency from the intermediate frequency f_if to the carrier frequency f₀.

EFFECT: low probability of correct detection of masked objects with space synthetic-aperture radar.

2 dwg