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Matrix reconstruction imaging method based on convolution adverse projection

An imaging method and back-projection technology, applied in the field of radar, can solve problems such as long computing time

Active Publication Date: 2018-11-30
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the algorithm sequentially images all pixels in the target area, and the calculation time is long

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  • Matrix reconstruction imaging method based on convolution adverse projection
  • Matrix reconstruction imaging method based on convolution adverse projection

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Embodiment Construction

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0055] like figure 1 Shown is the flow chart of the method of the present invention.

[0056] The method includes the following steps: establish a radar coordinate system, determine the imaging area, and divide the imaging unit; the MIMO radar array transmits the orthogonal frequency division signal and receives the echo signal; detects the target in the imaging area and maps it to the imaging unit; extracts pixels according to the probability unit to form a set of imaging pixel units; the pixel units of the sampling set are sequentially imaged according to the convolution back projection method, and the rest of the pixel units are reconstructed according to the matrix filling algorithm.

[0057] 1) The MIMO radar array has L t transmit antenna and L r A receiving antenna, with the geometric center of the radar array as the origin, the dire...

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Abstract

The invention relates to a matrix reconstruction imaging method based on convolution adverse projection. The method comprises the following steps: establishing a radar coordinate system, determining an imaging region, and partitioning imaging units, wherein a MIMO radar array emits an orthogonal frequency-division signal and receives an echo signal; performing target detection on the imaging region and mapping to the imaging unit; extracting pixel units according to the probability so as to form an image pixel unit set; performing order imaging on the sampling set pixel unit according to the convolution adverse projection unit, and reconstructing other pixel units according to a matrix filling algorithm. By using the structure and relevancy feature of the two-dimension image data, the effective imaging pixel points and the auxiliary pixel points are extracted by using the priori information to realize the real-time online full-region image reconstruction; the operation of orderly imaging all pixel points in the target region is avoided, the operand is reduced, and the instantaneity requirement of the imaging algorithm is guaranteed.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a matrix reconstruction imaging method based on convolution back projection. Background technique [0002] With its all-weather working ability, good environmental adaptability, and many advantages such as the ability to provide target multi-dimensional parameter information at the same time, millimeter wave radar has become the mainstream technology for the commercial application of automotive assisted driving. Driving perception system is one of the most marketable autonomous driving solutions. However, the current millimeter-wave radar technology is still stagnant in the anti-collision detection application stage of assisted driving, and has not given full play to its technical advantages in the field of automatic driving applications. To sum up, the main problems of millimeter-wave radar technology are mainly reflected in the following: target detection and tracking, and spot ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 杜劲松王伟高洁赵越南李鹏
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI