Method and system for realizing radio frequency target simulation through digital front-end modulation

Abstract

The invention provides a method for realizing radio frequency target simulation through digital front-end modulation. The method comprises the following steps: a computer control device sends position information and power information of a target and feature information of a target signal to a digital signal processing device and a flight turntable; the flight turntable outputs a main coupling vibration signal and transmits the main coupling vibration signal to the digital signal processing device; the digital signal processing device processes the position information, the power information, the signal characteristics and the main coupling vibration signals of multiple targets and outputs radio frequency signals required by each path of array antenna; finally, the radio frequency signals required by the array antennas are connected to the antennas, the antennas radiate the radio frequency signals at the same time, and echo signals of a target position are simulated in space. According to the invention, the digital signal processing device is used for carrying out triple radio frequency channel power distribution and calculating the power of triple three-type antennas, so that surface / body target simulation is realized, the radio frequency target simulation capability of the semi-physical simulation system is improved, and the construction cost of the semi-physical simulation system is reduced.

Description

technical field [0001] The present invention relates to the technical field of radio frequency target simulation, in particular to a method and system for realizing radio frequency target simulation through digital front-end modulation. Background technique [0002] In order to meet the needs of high-fidelity electromagnetic environment internal field reconstruction in a multi-scattering center battlefield environment composed of high-resolution imaging targets, interference, and background, and to improve the airspace information simulation capability of multi-target / scattering point electromagnetic environments, a space-intensive A hardware-in-the-loop simulation method for the simulation of multi-scattering centers. [0003] The traditional radio frequency simulation system simulates a scattering center, and each feed unit of the triad needs to be equipped with an independent feed control channel. If it is necessary to simulate a space-intensive scattering center, the num...

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Problems solved by technology

[0006] In view of the above-mentioned prior art, the inventor believes that the above-mentioned method can only radiate signals at a fixed position, and cannot simulate points other than the antenna position, and cannot simulate the relative changes in the positions of multiple scattering points in real conditions, and cannot achieve large-scale target simulation

As the number of targets increases, the simulation system is more complex and costly

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