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Synthetic aperture radar real-time imaging transposition processing method

A technology of synthetic aperture radar and real-time imaging, which is applied in the directions of measurement devices, radio wave reflection/re-radiation, and utilization of re-radiation, etc., can solve problems affecting the performance of SAR real-time imaging processing systems, and improve utilization, calculation and storage balanced effect

Active Publication Date: 2018-11-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In the existing SAR real-time imaging processing system, due to the need for multiple matrix transposition operations, the computing unit of the processor is usually idle for a part of the time because there is no data to process, which affects the performance of the SAR real-time imaging processing system. performance

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Embodiment Construction

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0047] figure 1 It is a flow chart of the synthetic aperture radar real-time imaging transposition processing method in the embodiment of the present invention, referring to figure 1 , the invention provides a kind of SAR real-time imaging transposition p...

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Abstract

The invention discloses a synthetic aperture radar real-time imaging transposition processing method. The method comprises the steps of averagely dividing received frequency domain vector data into afront section vector and a rear section vector, subjecting the front-section vector and the rear-section vector to sum-difference operation, dividing the sum value vector by two, multiplying the difference vector by a complex vector factor, and transmitting the obtained vectors to different processors respectively. Different processors perform IFFT operation respectively, and then the time domainresult is written into an external memory in the form of a column vector, and the data is finally read from the external memory in the form of a line vector. According to the method, the capacity limit of an external memory provided by a single processor is broken, and the balance of calculation and storage is achieved. The utilization rate of hardware resources and the performance of a whole real-time imaging processing system are improved.

Description

technical field [0001] The invention relates to the technical field of airborne radar imaging, in particular to a synthetic aperture radar real-time imaging transposition processing method. Background technique [0002] Synthetic Aperture Radar (SAR) is an advanced remote sensing method. It can observe the earth all-weather and all-time, and obtain high-resolution images of the observation area. It has a wide range of applications in the national economy and military fields. [0003] After the SAR receives the echo, it collects, stores and processes the data in real time. The collected raw data can be regarded as a two-dimensional data matrix. The data in each row in the two-dimensional data matrix is ​​the value of each sampling point of the received pulse, and the data in each column is the line frequency modulation received by the radar at different spatial positions. The corresponding sample point value of the pulse. SAR real-time imaging processing is a two-dimensiona...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9005G01S13/9004
Inventor 刘碧丹刘畅王岩飞
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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