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Time-division ground-based MIMO landslide radar imaging method based on ifft and mixed-matching pursuit

A matching tracking and radar imaging technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of large number of antennas and high data processing complexity

Active Publication Date: 2021-08-20
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a time-division ground-based MIMO landslide radar imaging method based on IFFT and mixed-matching tracking, which is used to solve the problems of large number of antennas and high data processing complexity in existing imaging methods in the field of landslide monitoring, and aims at multi-target imaging Introduce the mixed-matching tracking algorithm to solve the problem of artifact points, which greatly improves the imaging quality

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  • Time-division ground-based MIMO landslide radar imaging method based on ifft and mixed-matching pursuit
  • Time-division ground-based MIMO landslide radar imaging method based on ifft and mixed-matching pursuit
  • Time-division ground-based MIMO landslide radar imaging method based on ifft and mixed-matching pursuit

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Embodiment

[0074] Time-division ground-based MIMO landslide radar imaging method based on IFFT and hybrid matching tracking:

[0075] Step 1, constructing an equivalent random sparse transceiver array,

[0076] According to the landslide monitoring scenario, the transceiver array that meets the requirements is designed. The traditional MIMO radar is a uniform array with M transmitting and N receiving. The original receiving antenna spacing is λ / 2, and the transmitting antenna spacing is N(λ / 2), where λ is the wavelength of the transmitting wave. And specify the sparse arrangement of receiving arrays, randomly select N' receiving arrays from the original N receiving arrays, in order to ensure that the array aperture length is large enough, the positions of the first and last receiving antennas remain unchanged. According to the obtained N' sparse receiving array elements and M uniform transmitting array elements, MN' virtual array elements are obtained by using polynomial theory. Taking t...

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Abstract

The invention discloses a time-division ground-based MIMO landslide radar imaging method based on IFFT and mixed-matching tracking, which is used to solve the problems of large number of antennas and high data processing complexity in the existing imaging methods in the field of landslide monitoring, and aims at the false detection of multi-target imaging. The shadow point problem introduces a mixed-matching tracking algorithm, which greatly improves the imaging quality. The realization steps are: constructing an equivalent random sparse transceiver array; establishing an echo signal acquisition model; compressing processing in the range direction; compressing processing in the azimuth direction; completing two-dimensional target high-resolution imaging. The invention has the following advantages: the number of arrays is reduced, the cost of hardware is reduced; the complexity of data processing is reduced; and the resolution of distance direction and azimuth direction is improved.

Description

technical field [0001] The invention belongs to the technical field of landslide monitoring radar, and relates to a time-division ground-based MIMO landslide radar imaging method based on IFFT and mixed-matching tracking. Background technique [0002] Landslide is one of the common geological disasters, which has caused great harm to the construction and maintenance of railways and highways, as well as industrial and agricultural production. According to incomplete statistics, about one-sixth of the number of deaths and missing persons caused by natural disasters each year comes from landslide disasters, which cause huge losses to the safety of people's lives and property. Therefore, real-time monitoring of landslides is an important research direction in the field of disaster prevention in recent years, and it also has practical significance. [0003] Due to its stable, controllable and long-term repeatable observation characteristics, ground-based radar has become an impo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 蒋留兵杨中丽车俐宋永坤刘永吉李骢
Owner GUILIN UNIV OF ELECTRONIC TECH
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