METHOD OF SIMULATING RADIO SIGNAL REFLECTED FROM SPATIALLY DISTRIBUTED DYNAMIC RADIOPHYSICAL SCENE IN REAL TIME Russian patent published in 2010 - IPC G01S7/40 

FIELD: physics.

SUBSTANCE: coordinates of the position and motion parametres of receiving and transmitting radio systems are given. Based on direction patterns of their antennae, boundaries of the region of interaction of radio emission with a section of the scattering surface, which is approximated using elementary facet areas, are determined. After that based on parametres of the corresponding scattering model and different meteorological conditions, refraction, eclipse zone, movement of participants of the scene and with subsequent calculation of the angle of incidence of the radio beam and specific radar cross section for each facet, an array of facets is formed, where the facets are simultaneously visible from the position of the transmitting and receiving antennae, which are then ordered such that each fixed moment in time corresponds to partial signals of a group of facets with difference in propagation delay which does not exceed half the resolution power of the receiving device. Further, for each formed group of facets, based on the delay of partial signals of the facets, their Doppler frequency shift, attenuation, their complex scattering coefficients are calculated and their vector sum is found, from which the inverse Fourier transformation is calculated. As a result, a series of complex readings of pulsed characteristics of groups of facets is constructed, which determines complex readings of the pulsed characteristics of the radio physical scene. By folding them with a series of readings of the initial radio signal, the simulated echo signal is generated and all operations described above are repeated on the simulation modeling interval in accordance with the dynamics of development of the radio physical scene.

EFFECT: simulation of a radio signal reflected from a spatially distributed dynamic radio physical scene.

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