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Method and device for geometric correction of double-base forward-looking SAR images

A geometric correction and double base forward-looking technology, which is applied in the direction of measuring devices, instruments, and utilization of re-radiation, can solve the problems of large amount of calculation and long calculation time, so as to reduce calculation time, improve calculation parallelism, and improve calculation speed effect

Active Publication Date: 2021-11-23
成都汇蓉国科微系统技术有限公司
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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention proposes a method and device for geometric correction of bibase forward-looking SAR images based on DSP and FPGA. The problem of long calculation time and large amount of calculation

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  • Method and device for geometric correction of double-base forward-looking SAR images
  • Method and device for geometric correction of double-base forward-looking SAR images
  • Method and device for geometric correction of double-base forward-looking SAR images

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[0099] combine first Figure 2-3 The method for geometric correction of bistatic forward-looking SAR images based on DSP and FPGA of the present invention is described. figure 2 It is a flow chart of the geometric correction method for bistatic forward-looking SAR images based on DSP and FPGA, image 3 It is an interactive diagram of the geometric correction method for bistatic forward-looking SAR images based on DSP and FPGA. Such as Figure 2-3 As shown, the method includes the following steps:

[0100] Step S201: The DSP sends the central parameters of the imaging scene, the motion parameter data of the transmitting platform and the receiving platform to the FPGA through a high-speed interface; the DSP and the FPGA are interconnected through a high-speed interface; the FPGA has k oblique pixels Point correspondence calculation module;

[0101] The center of the imaging scene is the imaging target area irradiated by radar waves, and the parameters of the center of the i...

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Abstract

The present invention provides a dual-base forward-looking SAR image geometric correction method and device based on DSP and FPGA. The method includes: DSP sends parameter data to FPGA; FPGA arranges a two-dimensional virtual matrix on the ground plane, and FPGA has Calculation module for k oblique pixel point correspondences; take k unprocessed pixel points and coordinates from the two-dimensional virtual matrix; simultaneously input the acquired coordinates of the unprocessed pixel points into the oblique ground pixel point correspondence relationship Calculation module, each oblique pixel point correspondence calculation module processes the coordinates of an unprocessed pixel point; the calculation results of each oblique pixel point correspondence calculation module of the FPGA are combined into an oblique projection conversion matrix; DSP After the echo is processed in the range direction and the azimuth direction, and the image of the imaging oblique plane is obtained, the image of the imaging oblique plane is corrected into an image of the ground plane in combination with the oblique projection transformation matrix.

Description

technical field [0001] The invention relates to the field of radar imaging processing, in particular to a DSP- and FPGA-based dual-base forward-looking SAR image geometric correction method and device. Background technique [0002] Since the advent of Synthetic Aperture Radar (SAR) as a remote sensing detection system in the 1950s, SAR has always attracted the attention of experts in various fields at home and abroad with its unique all-time, all-weather, and working capabilities. Attention, SAR has developed rapidly. The advantage of bistatic forward-looking SAR is that it can perform forward-looking imaging. Bistatic forward-looking SAR has a separate launch platform and receiving platform. It has very good application prospects in matching guidance and other fields. [0003] However, the echo processing of bistatic forward-looking SAR is limited by the current industrial level of integrated circuits and the theoretical level of imaging algorithms. Currently, frequency-d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/418G01S13/9094G01S13/9021G01S13/9043
Inventor 胥秋王飞冷立根石韦伟汪宗福杨为华孙南
Owner 成都汇蓉国科微系统技术有限公司
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