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Design method of geostationary SAR bistatic configuration based on moving target detection

A technology of moving target detection and design method, which is applied in the direction of measuring device, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problems of unconsidered performance and poor performance of moving target detection, and achieve the effect of extended functions

Active Publication Date: 2022-04-29
北京理工大学重庆创新中心 +1
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Problems solved by technology

However, the traditional GEO satellite SAR bistatic configuration design method based on moving target detection only considers the static scene imaging performance, that is, the configuration design is completed under a given two-dimensional resolution, resolution angle and signal-to-noise ratio. The performance of moving target detection is not considered, so the performance of moving target detection is poor
In addition, the key to determining the bistatic geometric configuration of the GEO satellite-based SAR system suitable for moving target detection is to establish the theoretical relationship between the performance of moving target detection and configuration parameters, and to model the configuration design problem as an optimization problem , which was not involved in previous studies

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  • Design method of geostationary SAR bistatic configuration based on moving target detection
  • Design method of geostationary SAR bistatic configuration based on moving target detection
  • Design method of geostationary SAR bistatic configuration based on moving target detection

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Embodiment 1

[0058] This embodiment provides a GEO satellite SAR bistatic configuration design method based on moving target detection, please refer to figure 1 , the method mainly includes:

[0059] Step 1. Based on the parameters of the GEO satellite SAR system, the relationship between the system performance index and the configuration parameters is constructed.

[0060] Step 2. According to the relational expression in step 1, the configuration design problem is modeled as a multi-objective optimization problem, and the optimal bistatic configuration is obtained based on the third-generation non-dominated sorting evolutionary algorithm.

[0061] The key to determine the bistatic geometric configuration of the GEO satellite SAR moving target detection system is to establish the analytical relationship between the moving target detection performance and configuration parameters. Therefore, before the present invention determines the configuration parameters of the GEO satellite SAR syst...

Embodiment 2

[0099] On the basis of the first embodiment above, this embodiment provides a GEO satellite SAR bistatic configuration design device based on moving target detection. For at least some steps of the SAR bistatic configuration design method, please refer to Figure 4 , the device mainly includes the following modules:

[0100] The parameter acquisition module 41 is used to obtain the moving target detection performance index and configuration parameters of the GEO satellite SAR system; the moving target detection performance index includes the minimum detectable speed v r_MDV , the maximum unambiguous velocity v r_MUV , speed measurement accuracy and positioning accuracy σ x ; The configuration parameters include the ground projection ψ of the angle between the GEO satellite and the aircraft speed, and the incident angle θ of the first receiving channel of the aircraft R and the ground projection φ of the double base angle.

[0101] The model construction module 42 is used...

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Abstract

The present invention provides a GEO satellite SAR bistatic configuration design method based on moving target detection. Through the relationship between the system's moving target detection performance index and configuration parameters, a multi-objective optimization function is constructed. In the GEO satellite Under the constraints of SAR imaging performance, the third-generation non-dominated sorting evolutionary algorithm is used to select the best moving target detection configuration and complete the bistatic configuration design; this scheme can ensure that the GEO satellite SAR system can perform ground imaging while It also has the best ability to detect moving targets and expands the functions of GEO satellite SAR.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a GEO satellite SAR bistatic configuration design method based on moving target detection. Background technique [0002] GEO satellite SAR is a bistatic SAR system that uses GEO satellites to transmit signals and airborne to receive signals. It has better concealment and flexible configuration, and can detect and monitor targets in complex electromagnetic environments. Compared with the airborne bistatic SAR system and the LEO satellite SAR system, the GEO satellite SAR can realize forward-looking and even rear-view imaging, and has a wider detection range, which is conducive to the detection of moving targets. [0003] As early as 1997, MITER Corporation of the United States proposed the idea of ​​using stationary GEO satellites as the transmitting source and high-altitude unmanned aircraft as receiving equipment to form a GEO star-based SAR system for large-sca...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/9029G01S13/9058
Inventor 董锡超胡程崔畅
Owner 北京理工大学重庆创新中心