Method for realizing synthetic aperture radar echo simulator

Abstract

The invention provides a method for realizing a synthetic aperture radar echo simulator. The method comprises the following steps: carrying out C language programming on a computer according to a synthetic aperture radar target impulse function generating algorithm, after loading radar parameters, target parameters and motion platform parameters, calculating a target impulse function, generating a data file and storing the data file; and utilizing the echo simulator to receive the transmitting signal of the radar, carrying out convolution calculation with the target impulse function so as to obtain the target echo signals of the radar in different positions, and sending the echo signal out through digital-to-analogue conversion. By utilizing the method, the system resource consumption of target impulse function calculation is relieved, so that the system realization complexity is reduced; and moreover, the target echo signal is transmitted in real time through the convolution calculation of a high-speed digital processing platform, so that the ground test requirements of the synthetic aperture radar are satisfied.

Description

technical field [0001] The invention belongs to the technical field of radar testing, and relates to a method for designing and implementing a synthetic aperture radar echo simulator by collecting radar transmit signals and modulating target information to generate synthetic aperture radar target echo signals. Background technique [0002] Synthetic Aperture Radar Echo Simulator is a device used in synthetic aperture radar ground testing, which enables laboratory testing and evaluation of radar imaging performance and indicators. The Synthetic Aperture Radar (SAR) echo simulator obtains the target echo signal by receiving the radar transmission signal and performing convolution operation with the target impulse function. [0003] In 2008, Huang Yankun's master's thesis "Modeling, Simulation and System Design of Synthetic Aperture Radar Echo Simulator" from University of Electronic Science and Technology of China, and Zhang Chengqian's master's thesis "Design and Implementati...

AI Technical Summary

Problems solved by technology

The third method realizes the closed-loop simulation of radar echo generation, provides radar flight track in real time, and generates echo data in real time, but the simulator only meets the radar test of lower parameter indicators such as 50MHz bandwidth and 1KHz bandwidth

At present, the synthetic aperture radar technology is developing rapidly. When the radar bandwidth, resolution and other indicators increase, the calculation amount, resource consumption and design complexity of the real-time echo simulator system will increase sharply.

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