Method for realizing synthetic aperture radar echo simulator

A technology of synthetic aperture radar and implementation method, which is applied to instruments, radio wave measurement systems, etc., can solve the problems of increased computational complexity, resource consumption and design complexity of real-time echo simulator systems, and only meets the needs of ground testing. , the effect of reducing complexity, reducing system resource consumption and time consumption

Inactive Publication Date: 2013-04-03
BEIJING ZHENXING METROLOGY & TEST INST
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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 band...

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  • Method for realizing synthetic aperture radar echo simulator
  • Method for realizing synthetic aperture radar echo simulator
  • Method for realizing synthetic aperture radar echo simulator

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Embodiment Construction

[0039] A method for realizing a synthetic aperture radar echo simulator proposed by the present invention includes the following steps:

[0040]First, use computer programming to calculate the target impulse response function, load the radar parameters, motion platform parameters, target scene parameters, etc. into the program, run the program to generate data files and transfer them to the memory of the high-speed digital processing platform; secondly , the echo simulator receives the radar transmission signal, after down-conversion processing, it is converted into I / Q two-way baseband signal by FPGA, and the transmission signal is convolved with the target impulse function by using its own high-speed digital processing platform. The target echo signal is obtained, and the radio frequency echo signal is transmitted after signal up-conversion processing for radar reception and processing to realize the test of radar imaging performance.

[0041] The feature of the present inve...

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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...

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Application Information

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IPC IPC(8): G01S7/40
Inventor 王斌王森程威李代松胡志友
Owner BEIJING ZHENXING METROLOGY & TEST INST
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