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Radar distance super-resolution method based on target sparsity and time domain dechirping

A sparsity and super-resolution technology, applied to radio wave measurement systems, instruments, etc., can solve difficult and costly problems

Pending Publication Date: 2021-02-12
NANJING VOCATIONAL UNIV OF IND TECH
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Problems solved by technology

To further improve the distance resolution, it is necessary to increase the signal bandwidth, but sometimes it is difficult or the cost is too high, so it is of great significance to study the distance super-resolution technology

Method used

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  • Radar distance super-resolution method based on target sparsity and time domain dechirping
  • Radar distance super-resolution method based on target sparsity and time domain dechirping
  • Radar distance super-resolution method based on target sparsity and time domain dechirping

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Embodiment Construction

[0063] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0064] The present invention provides a radar range super-resolution method based on target sparsity and time-domain deskewing. Under the same radar signal bandwidth, compared with conventional pulse compression processing, it has higher distance resolution capability and realizes distance super-resolution. Resolution; Super-resolution over range improves the performance of object resolution, imaging, classification recognition, and object detection in clutter.

[0065] A radar range super-resolution method based on target sparsity and time-domain deskewing, comprising the following steps:

[0066] 1) Deskewing the chirp echo signal of the radar target in the time domain;

[0067] Specifically,

[0068] 1-1) Let the linear frequency modulation signal transmitted by the radar, that is, the LFM signal u(t) be,

[0069]

[0070] In the formula, t is time,...

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Abstract

The invention discloses a radar distance super-resolution method based on target sparsity and time domain dechirping. The radar distance super-resolution method comprises the following steps: 1) carrying out dechirping processing on a linear frequency modulation echo signal of a radar target in a time domain; 2) establishing a sparsity mathematical model of multi-target echo signals; and 3) constructing an optimization function about the target distance and solving the optimization function to obtain the target distance, and meanwhile, realizing radar distance super-resolution. Under the sameradar signal bandwidth, compared with conventional pulse compression processing, the method has a higher distance resolution capability, and distance super-resolution is realized; and the super-resolution in distance improves the performance of target resolution, imaging, classification and recognition, and target detection in a clutter.

Description

technical field [0001] The invention relates to radar distance resolution, in particular to a radar distance super-resolution method based on target sparsity and time domain de-slanting. Background technique [0002] In radar signal processing, improving range resolution is the basis for realizing target resolution, imaging and classification recognition. [0003] Modern radars usually transmit a large time-width-bandwidth product signal, and use pulse compression technology to improve the range resolution. At this time, the range resolution is inversely proportional to the signal bandwidth. To further improve the range resolution, the signal bandwidth needs to be increased, but sometimes it is difficult or the cost is too high, so it is of great significance to study the range super-resolution technology. Contents of the invention [0004] The purpose of the present invention is to provide a radar range super-resolution method based on target sparsity and time-domain de-...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 陈希信王洋李坡弓盼张庆海
Owner NANJING VOCATIONAL UNIV OF IND TECH
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