Time domain reconstruction airborne radar clutter rejection method based on knowledge assistance

An airborne radar and clutter suppression technology, which is applied in the radar field and can solve the problems of high clutter-to-noise ratio estimation, space-time two-dimensional filter depression, and high clutter-to-noise ratio estimation.

Active Publication Date: 2019-01-15
XIDIAN UNIV
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Problems solved by technology

The power selection training method adaptively selects samples with sufficient clutter power as training samples according to the actual clutter intensity measured. Disadvantages of overestimating
The phase and power selection training method selects echo data with sufficient power and phase distribution close to the clutter phase distribution as training samples, which can eliminate training samples containing strong interference target signals, but the problem of overestimation of noise-to-noise ratio still exists
Although this can reduce the non-uniformity between different samples to a certain extent, it cannot fundamentally solve the problem of non-uniform training samples

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  • Time domain reconstruction airborne radar clutter rejection method based on knowledge assistance
  • Time domain reconstruction airborne radar clutter rejection method based on knowledge assistance
  • Time domain reconstruction airborne radar clutter rejection method based on knowledge assistance

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Embodiment Construction

[0081] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0082] refer to figure 1 , is a flow chart of a knowledge-assisted time-domain reconstruction airborne radar clutter suppression method based on the present invention, comprising the following steps:

[0083] Step 1. Determine the airborne radar. There is a clutter scatterer S within the detection range of the airborne radar. The clutter scatterer S is one that can reflect unwanted echoes of the airborne radar when the beam of the airborne radar hits the groun...

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Abstract

The invention belongs to the technical field of the radar, and discloses a time domain reconstruction airborne radar clutter rejection method based on knowledge assistance. A clutter covariance matrixof a to-be-detected unit is reconstructed by utilizing data of the to-be-detected unit, the method can effectively overcome non-uniformity of a training sample, and the error is more stable; strong ground clutter of an airborne early-warning radar under non-uniform environment can be effectively rejected, the estimation precision of the clutter covariance matrix of the to-be-detected unit is improved, the time domain reconstruction airborne radar clutter rejection method is easy to realize on the engineering, and good clutter rejection and target detection performance can be obtained at the same time.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a knowledge-assisted time-domain reconstruction airborne radar clutter suppression method, which is suitable for airborne early warning radars in non-uniform environments to suppress strong ground clutter and detect ground low-speed moving targets. Background technique [0002] Airborne early warning radar will inevitably be affected by complex and strong ground clutter while receiving target echo signals. How to effectively detect moving targets from the extremely strong clutter background is always the key point of airborne early warning radar signal processing. Therefore, clutter suppression has become the primary problem that must be solved; space-time adaptive signal processing (STAP) technology makes full use of the two-dimensional system degrees of freedom of the radar airspace and time domain, and can ensure that the target signal obtains a certain coherent accumulation gain...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/292G01S7/41
CPCG01S7/292G01S7/415Y02A90/10
Inventor 王彤王美凤肖浩乔格阁
Owner XIDIAN UNIV
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