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Multi-angle-based obstacle radar multipath suppression method

A multi-path suppression, multi-angle technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problems of ineffective suppression of false images, strong target masking, etc., and achieve high-quality transparent barriers Radar imaging, the effect of suppressing false targets

Inactive Publication Date: 2019-06-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The specific scheme is as follows: First, use the energy of the false image through the 2D weighting function to achieve the purpose of suppressing the false image and enhancing the target image, but the problem is that this method cannot effectively suppress the false image due to the side lobes of the target image
The second is to fuse the sub-aperture images, but the fusion method used will make the strong target cover the weak target
[0005] Currently there is no comprehensive and effective wall multipath suppression method

Method used

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  • Multi-angle-based obstacle radar multipath suppression method
  • Multi-angle-based obstacle radar multipath suppression method
  • Multi-angle-based obstacle radar multipath suppression method

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0022] The present invention provides a multi-path suppression method for barrier-penetrating radar based on multi-angle, the specific process is as follows figure 1 shown, including the following steps:

[0023] Step 1. Compensating the target multipath phase. In the embodiment of the present invention, the multipath effect in the confined space has a great impact on target recognition, and the multipath echo after three reflections can be ignored. Therefore, in the embodiment of the present invention, the multipath phase of the target within three times is compensated . At this time, there are 6 kinds of multipath echoes such as figure 2 shown.

[0024] A schematic diagram of a multipath echo scene is shown in image 3 shown. After phase compensation, the target is moved to the correct position.

[0025] The schematic diagram of the secondary ref...

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Abstract

The invention discloses a multi-angle-based obstacle radar multipath suppression method, can effectively realize imaging processing under the multipath condition, can effectively suppress false targets and realizes high-quality obstacle radar imaging. The method comprises steps that a target multipath phase is compensated, multiple observation angles around a target are selected, echo data corresponding to each observation angle is obtained to perform aerial scene cancellation and backward projection imaging, and the imaging results of all the observation angles are subjected to information fusion to obtain a multipath suppression imaging result map.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a multi-path suppression method for barrier-penetrating radar based on multi-angle. Background technique [0002] Obstacle-penetrating radar imaging is a microwave imaging technology developed rapidly in recent years for small-scale areas behind obstacles. It can detect, image, locate, track and monitor targets hidden behind walls or buildings. Therefore, it has a wide range of applications in anti-terrorism security, disaster and hostage rescue. [0003] When the electromagnetic wave signal penetrates the wall, the electromagnetic wave will experience refraction, reflection, multipath propagation and change of propagation speed, which means that the echo signal of the target will have significant attenuation and distortion, additional delay and Phase changes, etc. These effects will pose great challenges to the subsequent signal processing process and accurate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
Inventor 毛二可曾涛向寅丁泽刚赵祎昆
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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