| 摘要 |
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(t), amplifying said signals, shifting the carrier frequency fto an intermediate frequency f, filtering, analogue-to-digital conversion with a sampling interval ??, recording the obtained sequence of digital samples s=s((i-1)??), 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=[x,y,z], whereand the amplitude transfer coefficient of the signal of the n-th false mark a?[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, and the distance between the space synthetic-aperture radar station and the relay station R, 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 sthrough a time interval ?, multiplying said sample with the corresponding reading of the modulating frequency M, converting the obtained sequence of digital samples of the products sMinto an analogue relayed pulse and shifting its frequency from the intermediate frequency fto the carrier frequency f.EFFECT: low probability of correct detection of masked objects with space synthetic-aperture radar.2 dwg |
