A Suppression Method of Azimuth Grating Lobe in UWB Radar Imaging

An ultra-wideband radar, azimuth technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc. Effect
CN104808200BActive Publication Date: 2017-10-03HUNAN NOVASKY ELECTRONICS TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUNAN NOVASKY ELECTRONICS TECH
Publication Date
2017-10-03

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Abstract

The invention discloses a method for restraining ultra-wideband radar imaging azimuth grating lobes, which comprises the steps of (1), carrying out imaging by adopting an ultra-wideband radar imaging method, and calculating an extended coherence factor (ECF) of each imaging point; and (2), weighting an original imaging result by using the ECFs acquired in the step (1) so as to restrain the image azimuth grating lobes. The method disclosed by the invention has the advantages of simple principle, convenient operation, good restraining effect and the like.
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Description

technical field

[0001] The invention mainly relates to the field of ultra-wideband radar imaging, in particular to a method for suppressing azimuth grating lobes of ultra-wideband radar imaging. Background technique

[0002] Ultra-Wideband (UWB) imaging radar has the advantages of good penetration and high resolution, and has been widely used in concealed target detection through walls, hidden object detection, medical imaging and other fields. Considering the portability, cost, and data processing capability of the radar system, UWB imaging radars often use sparse arrays with low element density, and then face the problem of azimuth grating lobes caused by insufficient spatial sampling rate, resulting in a decrease in imaging quality.

[0003] The literature R.E.Davidsen, J.A.Jensen and S.W.Smith, Two-dimensional randomarrays for real time volumetric imaging, Ultrasonic Imaging, Vol.16, 143-163, 1994 proposes to design random or aperiodic arrays through array configuration ...

Claims

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