Micro-motion signal separation method based on radar missing sampling

A signal separation and radar technology, which is applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve problems such as inability to effectively realize micro-motion signal decomposition, and achieve the effect of improving robustness

Active Publication Date: 2021-08-06
AIR FORCE UNIV PLA
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Problems solved by technology

[0005] Aiming at the problem that the above-mentioned existing technology cannot effectively realize the decomposition of micro-motion signals in the scene of missing radar sampling, the present invention proposes a micro-motion signal separation method based on radar missing sampling

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  • Micro-motion signal separation method based on radar missing sampling
  • Micro-motion signal separation method based on radar missing sampling
  • Micro-motion signal separation method based on radar missing sampling

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Embodiment Construction

[0075] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0076] The micro-motion signal separation method based on radar missing sampling proposed by the present invention is realized in the following manner:

[0077] Firstly, the echo model of narrow-band radar micro-motion signal with defect sampling is established;

[0078] Secondly, the signal model is converted into a sparse regularization model and the reconstructed time-frequency distribution is o...

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Abstract

The invention relates to a micro-motion signal separation method based on radar missing sampling, which comprises the following steps: firstly, establishing a narrow-band radar micro-motion signal echo model of missing sampling, secondly, converting the signal model into a sparse regularization model, and solving through a soft threshold iterative algorithm (ISTA) to obtain reconstructed time-frequency distribution; then extracting a maximum value point of the frequency spectrum during reconstruction, defining a maximum value point association problem as an assignment problem, solving the problem through Kalman filtering and a Hungary algorithm to obtain an instantaneous frequency trajectory, and finally, separating a micro-motion echo signal of each scattering point on a trajectory target by adopting an intrinsic linear frequency modulation component decomposition (ICCD) algorithm. Compared with a traditional time-frequency filtering group decomposition method, the method can better decompose signal components which are crossed and overlapped in a time-frequency domain, and is more suitable for micro-motion signal decomposition under the condition of radar sampling defect.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a micro-motion signal separation method based on radar missing sampling, which is used for the extraction of micro-motion features of ballistic targets in a complex electromagnetic environment of narrow-band radar. Background technique [0002] In the scenario of radar detecting ballistic targets, in addition to translational flight, the ballistic missile will spin around its own axis of symmetry and may perform conical rotation around a certain directional axis during flight. These fine movements will affect the radar feedback The wave produces additional frequency modulation in addition to translational Doppler, a phenomenon known as the micro-Doppler effect, which provides useful information for research on target recognition and radar imaging. In the past decade, narrow-band radar ballistic target micro-motion feature extraction has been intensively studied....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/292G01S7/35G01S13/58G01S13/72
CPCG01S7/2923G01S7/354G01S13/583G01S13/723
Inventor 王欢张群李开明袁航罗迎康乐梁佳
Owner AIR FORCE UNIV PLA
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