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Simultaneous SAR/GMT echo simulation method and system

A technology of echo simulation and real-time control system, applied in radio wave measurement systems, instruments, etc., can solve the problems of inability to meet the performance test requirements of SAR/GMTI radar, multiplication of calculation amount, and large amount of calculation.

Active Publication Date: 2022-03-29
南京雷电信息技术有限公司
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Problems solved by technology

However, the calculation of SAR echo signal simulation is very large, and the calculation of the echo signal simulation of multiple moving targets is doubled, which cannot meet the requirements of SAR / GMTI radar performance testing.

Method used

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  • Simultaneous SAR/GMT echo simulation method and system
  • Simultaneous SAR/GMT echo simulation method and system
  • Simultaneous SAR/GMT echo simulation method and system

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Embodiment Construction

[0070] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0071] Such as figure 1 As shown, in the simultaneous SAR / GMT echo simulation system provided by the present invention, the preset test parameters are first placed in the data management center of the host computer, and the GPU vector parallel calculation program calls the interface file for the SAR scene, GMT data, and track files. Parallel acceleration calculation is performed on the data for scattering elements to obtain independent and combined SAR / GMT one-dimensional range image data and echo data. These sets of data are transmitted to the storage board through the optical fiber interface / 10 Gigabit Ethernet. When the test starts, the data is transmitted to the FPGA signal processing board through the PCIe bus. The functions of the signal processing boa...

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Abstract

The invention discloses a simultaneous SAR / GMT echo simulation method and system. The method comprises the following steps: setting test parameters in an upper computer; importing test parameters, running an SAR / GMT distributed scattering surface source parallel algorithm under a GPU architecture to obtain independent and merged SAR / GMT one-dimensional range profile data and echo data, and sending the data and echo data to a storage board; the upper computer outputs test parameters including echo types to the real-time control system; the signal processing board card selects and calls data in the storage board according to the echo type and then outputs the data through an optical fiber network; and according to the echo type of the test parameter, the real-time control system controls the signal processing board card to process the one-dimensional range profile data or the echo data, then DUC and DA conversion is carried out, and the data is output after being processed by the radio frequency upper variation system. According to the method, a GPU parallel computing architecture is adopted, and SAR radar echo signals synthesized by SAR / GMT at the same time can be simulated in a single channel.

Description

technical field [0001] The invention relates to the technical field of radar performance testing, in particular to a simultaneous SAR / GMT echo simulation method and system thereof. Background technique [0002] Synthtic Aperture Radar (SAR) is a radar system that uses pulse compression technology and synthetic aperture principle to obtain two-dimensional (range and azimuth) high-resolution radar systems. Compared with the optical radar system, it is not affected by weather and cover, and can penetrate clouds and vegetation to detect ground feature information. It is the most important and main means of terrain and ground feature detection equipment. For decades, it has been more and more widely used in civilian and military fields, and it is the key research direction of radar technology and signal processing technology in various countries. [0003] In conventional SAR images, the ground moving target (GMT) will have distance walking, defocusing, azimuth position deviation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 王娟曹庆刚王九灵哈敏占庆祥
Owner 南京雷电信息技术有限公司
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