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Arc array radar moving target focusing detection method based on radial velocity search

A radial velocity, moving target technology, applied in the field of arc array radar moving target focus detection, can solve the problems of increased defocusing degree of imaging effect, offset of target azimuth position, and decrease of received signal amplitude, so as to improve target detection. Probability, the effect of increasing energy

Pending Publication Date: 2021-04-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] When the arc array antenna is used to detect the movement of the target, the change of Doppler parameters will cause the target position to shift and the amplitude of the received signal to decrease, resulting in the defocusing of the moving target.
When the radial velocity of the moving target increases, the degree of defocus of the imaging effect will also increase, resulting in a decrease in the signal-to-noise ratio (SNR) and signal-to-clutter ratio (SCR) of the moving target, thereby reducing the detection probability

Method used

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  • Arc array radar moving target focusing detection method based on radial velocity search
  • Arc array radar moving target focusing detection method based on radial velocity search
  • Arc array radar moving target focusing detection method based on radial velocity search

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Embodiment Construction

[0035] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] The present invention designs an arc array radar moving target focus detection method based on radial velocity search, such as figure 1 As shown, the steps are as follows:

[0037] Step 1: Perform range-wise processing on the echo signal of the arc array radar;

[0038] Step 2: Design several groups of different matched filters for traversal filtering to realize focus detection of moving targets. The process of this step is as follows:

[0039] 2-1: Set the filtering reference radial velocity and build a matched filtering function;

[0040] 2-2: Filter radial velocity traversal, judge the focus effect, select the optimal focus effect, and obtain the radial velocity of the moving target;

[0041] 2-3: Focus detection and positioning of the moving target to obtain the precise position and motion parameters of the target.

[0042] T...

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Abstract

The invention discloses an arc array radar moving target focusing detection method based on radial velocity search. The method sequentially comprises the following steps of carrying out range direction processing on echo signals of an arc array radar, and designing a plurality of groups of different matched filters for traversal filtering to realize focusing detection of the moving target. A radial speed search mode is adopted, different matching filters are designed for different reference radial speeds, and traversal matching is carried out on echo signals of the arc array antenna, so that a real moving target at a corresponding speed can be better matched, the energy of the moving target is improved in echo signal processing, and the target detection probability is improved.

Description

technical field [0001] The invention belongs to the field of radar moving target detection, and in particular relates to an arc array radar moving target focusing detection method. Background technique [0002] The arc-shaped array antenna quickly realizes arc-shaped aperture synthesis through the MIMO signal transceiver mechanism, and detects and focuses on moving targets in the area to be detected near the platform. The MIMO microwave imaging mode based on the arc array antenna is proposed on the basis of the existing MIMO technology and the research on the linear array antenna imaging method. The system transmits bandwidth signals in the propagation direction of electromagnetic waves to achieve distance resolution; multiple antenna array elements are arranged along the arc angle to form arc apertures, and the arc angle resolution is realized through the coherent accumulation of echo signals ( That is, the azimuth); at the same time, through the high-speed microwave switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/50
CPCG01S7/411G01S13/50
Inventor 闫贺李睿安陈超侯倩茹徐星张劲东王旭东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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