SAR real time imaging processing device based on GPU

A technology for real-time imaging and processing equipment, applied in the reflection/re-radiation of radio waves, instruments, measurement devices, etc. Good real-time effect

Active Publication Date: 2011-07-20
SPACE STAR TECH CO LTD
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  • SAR real time imaging processing device based on GPU
  • SAR real time imaging processing device based on GPU
  • SAR real time imaging processing device based on GPU

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[0024] figure 1 It is a schematic diagram of the equipment of the present invention, mainly including a SAR raw data acquisition module, a server, a disk array, and a GPU-based real-time imaging module. The SAR raw data acquisition module converts the high-speed serial code stream of ECL level into the low-speed parallel code stream of ECL level, and then converts it into LVTTL level code stream and sends it to FPGA; stores the data in FPGA into the cache, Utilize PLX9656PCI bridge chip, under the control of FPGA, upload the cached data to the server through PCI bus. After receiving the data, the server sends the data to the disk array for real-time recording, calculates parameters such as Doppler center frequency and modulation frequency, and then sends the calculated parameters together with the received data to the GPU-based real-time imaging module for real-time recording. CS real-time imaging processing. The processed imaging data is sent to the server for real-time dis...

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Abstract

The invention relates to an SAR real-time imaging processing device based on GPU, which mainly comprises an SAR original data collection module. The original data with high-speed serial code stream form is converted into the one with ECL leveled low-speed parallel code stream; the code stream is further converted into LVTTL level code to be sent to FPGA; a controller in the FPGA is used for saving the data into a cache, and a PCI bus then uploads the data to a server; the server sends the received data to a disk array and a real-time imaging module based on GPU; Doppler center frequency and frequency modulation parameters are calculated and sent to the real-time imaging module based on GPU; the result is acquired in real time and is displayed in real time; the real-time imaging module based on GPU carries out imaging processing by GPU based on the received data, the Doppler center frequency and the frequency modulation parameters and then sends the data after imaging processing to theserver; the disk array receives the data and records in real time. The device has the advantages of real-time imaging, quick processing speed, simple structure, easy expansion, real-time recording ofthe original SAR data and stable and reliable system.

Description

technical field [0001] The invention relates to a real-time imaging processing device for the data flow of a remote sensing SAR satellite downlink data acquisition system, in particular to a SAR image quick viewing device for a satellite ground receiving station. Background technique [0002] With the continuous development of aerospace remote sensing technology at home and abroad, SAR (Synthetic Aperture Radar) satellites are increasingly valued by the military of various countries because of their advantages of being unaffected by climate conditions, imaging day and night, and having certain transmission capabilities. [0003] In order to realize the real-time imaging processing of SAR satellite downlink data at the satellite ground receiving station, two key processing steps of real-time acquisition and imaging of SAR raw data must be solved. Among them, SAR imaging processing has the characteristics of high data rate and large amount of computation. Real-time processing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/285G01S13/90
Inventor 朱翔宇董学志单博刘晓龙李丹妮宋张波高振华袁广辉陈磊苏扬张振宁
Owner SPACE STAR TECH CO LTD
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