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Real-time satellite-borne SAR processing device and method

A real-time processing, spaceborne technology, applied in measurement devices, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem that cannot meet the application requirements of spaceborne SAR, the large amount of calculation and data storage for SAR real-time imaging and other problems, to achieve the best processing performance, reduce the amount of calculation, and improve the processing efficiency.

Active Publication Date: 2019-04-12
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

[0005] SAR real-time imaging has a large amount of calculation and data storage, and the high-efficiency implementation of matrix transposition is relatively complicated. If the localized and aerospace-grade devices are selected for spaceborne real-time processing, compared with conventional airborne devices, the scale of FPGA and memory read There is a big gap between devices in terms of speed and other performance indicators, and continuing to use the airborne SAR design architecture can no longer meet the application requirements of spaceborne SAR

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  • Real-time satellite-borne SAR processing device and method

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Embodiment Construction

[0037] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0038] This embodiment is based on microprocessor (SOC / MCU / DSP)+FPGA framework, adopts FPGA chip (such as JFM4VSX55RT) as high-performance processor, realizes high-performance FFT, multiplication, look-up table (such as COS / SIN etc.) and matrix Transpose control; use localized microprocessor (such as Orbit SOC chip S698PM) as the core processor to realize system control and parameter calculation; add large-capacity dynamic memory (such as DDR2VD2D8G08xS88xx8U4H) to realize on-board SAR imaging data storage. Use ping-pong static memory (such as SRAM VDSR16M32RS64MS4V12) to complete the temporary buffering and proces...

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Abstract

The invention discloses a real-time satellite-borne SAR processing device and method. The device comprises a first FPGA, second FPGA, an SOC, a first DDR2, a second DDR2, a third DDR2, a first SRAM and a second SRAM. An improved RD or CS imaging algorithm is selected as the real-time satellite-borne SAR processing method, and a data preprocessing and imaging algorithm is realized through two stages of processing. Through methods such as staged processing, FPGA synchronous pipeline computation and parallel transposition access, homemade and aerospace-level processing chips with relatively low performance can satisfy the performance requirements of real-time satellite-borne SAR processing.

Description

technical field [0001] The invention relates to the technical field of SAR real-time imaging processing, in particular to a spaceborne SAR real-time processing device and method. Background technique [0002] Spaceborne synthetic aperture radar (SAR) has become an important means of space observation of the earth because it is not affected by weather and climate, and can observe the earth at all times, all weather, high resolution, and large areas. With the continuous improvement of resolution and mapping bandwidth, the amount of echo data acquired by SAR satellites and the corresponding data transmission rate have increased by tens of times, which has brought enormous pressure to the processing of spaceborne SAR data. At present, the SAR remote sensing satellite mission chain is mainly composed of ground mission planning, on-board storage of remote sensing data, satellite-to-ground data transmission, and ground receiving and processing. Realizing SAR real-time processing o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9004
Inventor 孙晓晖鲁加国陈一新刘仍莉吕新正胡虹顾庆远方志红陈仁元邓海涛孙晓舟陈之涛
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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