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Synthetic aperture radar simulation in high-frequency approximation method based on electromagnetic scattering

A synthetic aperture radar, high-frequency approximation technology, applied in the field of electronic information simulation, it can solve the problems of ignoring the coupling of target scattering elements, low accuracy, and large amount of calculation, achieving high resolution, increasing compatibility, and simplifying construction. The effect of the moulding process

Inactive Publication Date: 2013-06-19
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

This deficiency is reflected in two points, one is the large amount of calculation and low efficiency; the other is that the coupling problem between the target scattering elements is ignored, which is quite different from the actual scattering situation and the accuracy is not high

Method used

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  • Synthetic aperture radar simulation in high-frequency approximation method based on electromagnetic scattering
  • Synthetic aperture radar simulation in high-frequency approximation method based on electromagnetic scattering
  • Synthetic aperture radar simulation in high-frequency approximation method based on electromagnetic scattering

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Experimental program
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Effect test

Embodiment

[0106] The target on the ground of the present invention is a corner reflector (manufacturer: Wuxi Duotong Machinery Factory Co., Ltd., model: TLF-470A).

[0107] Table 1 Radar parameters

[0108] parameters

value

Bandwidth B (MHz)

300

Sampling rate F (MHz)

480

Pulse width T(μs)

1.4

Pulse repetition frequency PRF (Hz)

1500

Wavelength λ (m)

0.032

Center viewing angle θ L (°)

90.0

The shortest slope distance R 0 (m)

1414

Aircraft speed V (m / s)

200

[0109] track height h 0 (m)

1000

Beam center crossing time (s)

0

Initial irradiation time (s)

-0.34

range sampling delay t d (μs)

8

Azimuth points N a

1024

distance points N r

2048

[0110] Table 2 Target parameters

[0111] parameters

value

Center X coordinate x tar (m)

0

Center Y coordinate y tar (m)

...

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Abstract

The invention discloses synthetic aperture radar simulation in a high-frequency approximation method based on electromagnetic scattering. According to radar, firstly a needed radar parameter is chosen, and then the radar parameter is distributed to different modules for position analysis, scattering electric field calculation, emitted signal production and echo generation processing. A synthetic aperture radar is simulated from the electromagnetic angle, and a method of synthetic aperture radar echo simulation is improved. According to the synthetic aperture radar simulation, a complex electromagnetic scattering principle is introduced to the synthetic aperture radar echo simulation, the problem that in a traditional method, mutual coupling between electromagnetic sources inside a target is neglected is solved, an obtaining process of synthetic aperture radar echo data is simulated from an overall perspective, operation quantities are greatly reduced, efficiency of an echo simulation process is improved, and results of the echo simulation approximate real situations.

Description

technical field [0001] The invention relates to a device for simulating the acquisition process of high-resolution synthetic aperture radar echo data, specifically, a device for simulating high-resolution synthetic aperture radar echo based on electromagnetic scattering theory, which belongs to the electronic information simulation technology field. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-day, all-weather active information acquisition system. Such as figure 1 As shown, the full-link system of synthetic aperture radar can be divided into three parts, namely, the echo data acquisition part on the radar carrier platform, the space segment data transmission part and the ground segment data processing part. The synthetic aperture radar system obtains the original echo data of the synthetic aperture radar by transmitting and receiving pulse signals. [0003] Synthetic aperture radar echo simulation technology is a technology that simulates the ac...

Claims

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Application Information

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IPC IPC(8): G01S7/40
Inventor 于泽林鹏李洲李春升
Owner BEIHANG UNIV
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