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Matrix transposition method in SAR imaging system based on DSP chip

A matrix transposition and imaging system technology, applied in the field of communication, can solve the problems of not being able to meet the real-time performance of matrix transposition, and consume a lot of time, and achieve the effects of overcoming a lot of time-consuming, saving storage space, and wide application range

Inactive Publication Date: 2013-11-27
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this patent application is that the data read-in and output speeds of SDRAM are limited by the width of the bus, and the matrix transposition device needs to open up a large storage space for intermediate variables in SDRAM, so each data transfer will consume a lot of time , which cannot satisfy the real-time performance of matrix transposition

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  • Matrix transposition method in SAR imaging system based on DSP chip
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  • Matrix transposition method in SAR imaging system based on DSP chip

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] Refer to attached figure 1 , the concrete steps of the present invention are as follows:

[0048] Step 1, divide the original matrix horizontally.

[0049] The original matrix of vertically continuous radar echo data stored in the external storage space of the DSP chip is divided into M rough division matrices horizontally according to the number of processing cores of the DSP chip.

[0050] Radar echo original data matrix in the example of the present invention is stored in the external memory space of DSP chip TMS320C6678, vertically continuous, vertical point number is nrn, horizontal point number is nan. According to the characteristics of the DSP chip TMS320C6678 having eight parallel cores, the original echo data is horizontally divided into eight rough division matrices and assigned to the eight cores.

[0051] Step 2, divide the rough matrix verticall...

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Abstract

The invention discloses a matrix transposition method in an SAR imaging system based on a DSP chip. The problems that radar real-time imaging storage space is small, and the requirement for real-time performance is high are mainly solved. The implementation process of the matrix transposition method comprises the steps that (1) an original matrix is transversely divided; (2) a rough classification matrix is longitudinally divided; (3) small unit matrixes are obtained; (4) storage space is created; (5) the small unit matrixes are classified; (6) transposition is carried out on the small diagonal unit matrixes; (7) transposition is carried out on the small non-diagonal unit matrixes; (8) the transpositioned matrixes are combined. The matrix transposition method aims at the transposition operation of a large-scale radar return original data matrix, the large matrix is roughly and finely divided into two classes of small unit matrixes, different transposition methods are applied to processing the matrixes, a large amount of storage space is saved, and operation efficiency is improved. The matrix transposition method is simple, easy to implement and suitable for the transposition operation of various radar real-time imaging systems and other systems.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a matrix transposition method in a Synthetize Aperture Radar SAR imaging system based on a digital signal processor (Digital Signal Processor DSP) chip in the technical field of radar digital signal processing. The invention can be used to quickly transpose large-scale radar echo data to solve the real-time requirement of synthetic aperture radar imaging and the shortage of storage resources. Background technique [0002] Radar echo data matrix transposition has a large amount of data and high real-time requirements, but in reality, the processing storage space is scarce, so how to realize the fast transposition method of large-scale matrix in limited storage space has become an urgent problem to be solved, which is also for The realization of real-time SAR imaging has laid the foundation, [0003] The patent "a method of matrix transposition" (publication number: CN...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S13/90
Inventor 王虹现方午梅邢孟道钱宏博
Owner XIDIAN UNIV
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