METHOD FOR SIMULATING RADIO SIGNAL Russian patent published in 2021 - IPC G01S7/40 

FIELD: radar technology.

SUBSTANCE: invention relates to the field of radar technology and can be used in semi-natural modeling of radio wave propagation in the air-to-surface, surface-to-air, surface-to-surface and air-to-air channels, taking into account multiple re-reflections from the surface, natural and artificial objects by providing real-time simulation of a radio signal reflected from a spatially distributed radiophysical scene, which are fragments of the earth's surface with varying degrees of roughness (relief, water surfaces, vegetation, artificial objects, etc.) and the surfaces of artificial objects with different electromagnetic properties (metal, glass, plastic, radio-absorbing materials, metamaterials, etc.). The specified technical result is achieved by additional calculation of the angle of reflection of each ray from the elementary area, the formation of a ray reflected from the elementary area and checking the intersection of each reflected ray with all facets of the radiophysical scene section, if there is a point of intersection of at least one reflected beam with any facet section of the radiophysical scene, repeating the procedure of multiple re-reflection of the radio signal with the formation of an intermediate reflected signal until the intersection of each reflected beam with the facets of the section of the radiophysical scene becomes impossible or until it reaches a certain specified number of repetitions, grouping simultaneously irradiated elementary areas, the formation of a simulated reflected radio signal, which is represented as a superposition of signals reflected and re-reflected from separate elementary areas, each of which is equal to a radio signal delayed for a certain time and multiplied by a complex factor, which is the finite impulse response of the discrete filter.

EFFECT: invention makes it possible to improve the accuracy of real-time imitation of a radio signal reflected from a spatially distributed radiophysical scene, as well as to expand the functionality of the method.

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