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Method for clutter suppression in glacier detection radar imaging

A detection radar and clutter suppression technology, applied in the field of radar, can solve problems such as unsatisfactory clutter suppression effect, inability to obtain radar echo signal estimates on the ice surface, and ice surface clutter cannot be suppressed, etc., to achieve simple and fast estimated effect

Inactive Publication Date: 2014-07-02
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In the process of realizing the present invention, the applicant found that due to hardware limitations of the existing airborne glacier detection radar, the angular resolution of the conventional beamforming method is low, and the clutter on the surface of the ice layer below the near-nadir point cannot be suppressed, and the clutter suppression effect is not ideal, and this method cannot obtain the estimated value of the ice surface radar echo signal

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  • Method for clutter suppression in glacier detection radar imaging
  • Method for clutter suppression in glacier detection radar imaging
  • Method for clutter suppression in glacier detection radar imaging

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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...

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Abstract

The invention provides a method for clutter suppression in glacier detection radar imaging. According to the method, the maximum likelihood estimation algorithm is adopted for estimating ice layer surface clutter, surface clutter influence on practical radar echo data is removed, the clutter can be effectively suppressed, and an estimation of ice layer surface echo signals can be obtained. The method is a clutter suppression algorithm having high application value.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method for suppressing clutter in glacier detection radar imaging. Background technique [0002] The airborne glacier detection radar has a low operating frequency, and its antenna beam angle is relatively large. The echo (also known as surface clutter) at the junction of the air and the ice surface in the non-nadir direction will interfere with the target signal below the surface of the radar. The clutter partially or completely covers the echo signal of the bottom target, resulting in the failure of the detection of the bottom (or internal layer) target position, and the surface clutter must be suppressed. The synthetic aperture technology utilizes the Doppler information of the echo signal to suppress the ice surface clutter along the track direction. In order to reduce the surface clutter in the cross-track direction, a multi-channel receiver-borne radar is used to achieve t...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/2923G01S7/2928G01S13/88
Inventor 张晓娟饶丽婷王友成吴超
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI