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Radar space-time adaptive processing method and device based on volume correlation function

A space-time adaptive and correlation function technology, applied in the field of radar, can solve the problems of inability to obtain, the performance of moving target detection, and the performance of STAP technology clutter suppression, and achieve the effect of robust detection performance.

Active Publication Date: 2020-06-19
TSINGHUA UNIV
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Problems solved by technology

[0003] Space-time adaptive processing (STAP) technology is an efficient means of clutter suppression. In order to ensure the performance of clutter suppression, STAP technology requires a large number of independent and identically distributed training samples to estimate the statistical characteristics of clutter. However, in the non-uniform environment, it is often impossible to obtain enough uniform training samples, which leads to the decline of the clutter suppression performance of the STAP technology, and subsequently leads to the decline of the moving target detection performance.

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  • Radar space-time adaptive processing method and device based on volume correlation function
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  • Radar space-time adaptive processing method and device based on volume correlation function

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0061] figure 1 It shows a schematic flowchart of a radar space-time adaptive processing method based on a volume correlation function provided in this embodiment, including:

[0062] S101. Acquire echo data within a coherent processing interval of the radar, and estimate a sampling signal subspace corresponding to a distance unit to be measured....

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Abstract

The embodiment of the invention provides a radar space-time adaptive processing method and device based on a volume correlation function, and the method comprises the steps: obtaining echo data of a radar in a coherent processing interval, and estimating a sampling signal subspace corresponding to a to-be-measured distance unit; based on a volume correlation function of the sampling signal subspace and the target signal subspace, obtaining the distance between the sampling signal subspace and the target signal subspace; based on the distance between the sampling signal subspace and the targetsignal subspace, obtaining detection statistics of the to-be-detected distance unit; and comparing the detection statistics of the to-be-detected distance unit with a preset threshold, and determiningwhether there is a target echo in the to-be-detected distance unit. The radar space-time adaptive processing method based on the volume correlation function provided by the invention can be applied to an airborne radar to obtain a more ideal target detection result in a space-time adaptive processing scene, especially in a non-uniform environment.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a radar space-time adaptive processing method and device based on a volume correlation function. Background technique [0002] Radar (such as airborne radar) is widely used in target detection tasks. However, there are also a large number of background echoes, namely clutter, arriving at the radar receiver together with the target echo. In actual scenarios, the energy of clutter is often stronger than the target echo. In order to achieve target detection, it is necessary to eliminate the clutter in the echo of the radar receiver, so as to provide a sufficiently high signal-to-noise ratio for subsequent detectors and ensure target detection performance. [0003] Space-time adaptive processing (STAP) technology is an efficient means of clutter suppression. In order to ensure the performance of clutter suppression, STAP technology requires a large number of independent and identical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 李刚姜智卓刘瑜何友
Owner TSINGHUA UNIV
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