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Synthetic aperture radar imaging and processing transposition storage method and data access method

A technology of synthetic aperture radar and imaging processing, applied to radio wave measurement systems, instruments, etc., can solve the problem of low transposition storage efficiency

Inactive Publication Date: 2013-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to propose a high-efficiency transposition storage algorithm with read and write balance in order to solve the problem of low transposition storage efficiency in synthetic aperture radar imaging processing

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  • Synthetic aperture radar imaging and processing transposition storage method and data access method

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Embodiment Construction

[0023] In the following, the implementation of the method of the present invention will be described in detail by taking two-dimensional synthetic aperture radar data with a size of 8192×8192 as an example in conjunction with the accompanying drawings.

[0024] The synthetic aperture radar imaging processing transposition storage algorithm of the present invention includes the following specific steps:

[0025] Step 1: According to the size of the synthetic aperture radar two-dimensional data matrix and the data bit width, select a DDR3 SDRAM with matching capacity and data bit width.

[0026] For capacity, choose a DDR3 SDRAM capacity capable of holding SAR 2D data. If a single DDR3 SDRAM memory chip cannot meet the capacity requirements, the number of rows can be expanded by connecting multiple memory chips end to end.

[0027] For the bit width, choose the DDR3 SDRAM data bit width that is equal to the SAR data bit width. When a DDR3 SDRAM memory particle cannot meet the ...

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Abstract

The invention discloses an efficient transposition storage method in the synthetic aperture radar imaging and processing process. The method includes a first step of dividing a synthetic aperture radar two-dimensional data matrix into a plurality of submatrix blocks with the same size, wherein data points in each submatrix block are just equal to the data points stored in one line of a double data rate 3 synchronous dynamic random access memory (DDR3 SDRAM) in number, a second step of carrying out numbering on the submatrix blocks line by line and gradually mapping data in the first submatrix block into the first line of a Bank 0 of the DDR3 SDRAM, and a third step of mapping the data in the second submatrix block into the first line of a Bank 1 of the DDR3 SDRAM line by line according to the same method, by parity of reasoning, completing mapping the first line of a last Bank and then turning to the second line of the Bank 0 until the data of all the submatrix blocks are mapped. The synthetic aperture radar imaging and processing transposition storage method is capable of solving the problem of too low transposition storage efficiency in the synthetic aperture radar imaging and processing.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and relates to an efficient transposition storage method in the process of synthetic aperture radar imaging processing. Background technique [0002] The data obtained by the synthetic aperture radar can be regarded as a two-dimensional matrix. The row direction of the two-dimensional matrix is ​​the range data, and the column direction is the azimuth data. In the synthetic aperture radar imaging process, the data needs to be compressed along the range direction and the azimuth direction respectively, so the two-dimensional data needs to be transposed and stored. The efficiency of transposition storage will directly affect the real-time performance of synthetic aperture radar imaging processing. [0003] Commonly used transpose storage algorithms include the marching list method and the column progressing method. Because of the large amount of synthetic aperture radar data and high real-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
Inventor 谢宜壮刘小宁于文月陈禾曾涛龙腾
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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