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Automobile millimeter wave radar sparse array grating lobe false target identification method and system

A millimeter-wave radar, false target technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation and other directions, can solve problems such as affecting processing, affecting assisted driving, automatic driving, and radar detection target scene confusion. , to improve the angular resolution and achieve the effect of suppression

Active Publication Date: 2020-09-18
成都纳雷科技有限公司
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Problems solved by technology

For radar, that is to say, the scene of a target will have the phenomenon that multiple targets are estimated, and some of them are false targets. If the false targets are not identified and eliminated, the subsequent processing will be seriously affected, so that the radar detects the target. The scene is chaotic, seriously affecting assisted driving or automatic driving

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  • Automobile millimeter wave radar sparse array grating lobe false target identification method and system
  • Automobile millimeter wave radar sparse array grating lobe false target identification method and system
  • Automobile millimeter wave radar sparse array grating lobe false target identification method and system

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Embodiment Construction

[0074] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0075] Such as figure 1 As shown, the automotive millimeter-wave radar sparse array grating lobe false target recognition method of the present embodiment includes steps:

[0076] 1) Target detection;

[0077] 2) Target angle estimation;

[0078] 3) Sorting and normalizing target echo power in different directions;

[0079] 4) Construct a false interference covariance matrix;

[0080] 5) Calculate the adaptive weight;

[0081] 6) Recalculate the spatial spectrum based on the adaptive weights;

[0082] 7) False target recognition is performed after the beam output is normalized.

[0083] The present invention uses two-stage spatial spectrum calculations. During the first-stage spatial spectrum calculation, the method based on digital beamforming is used to estimate the target angle to obtain several possible target arrival directions; afte...

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Abstract

The invention discloses an automobile millimeter wave radar sparse array grating lobe false target identification method and system, belongs to the technical field of automobile radar, and is used forsolving the problem of grating lobe false targets caused by the fact that an existing automobile radar adopts a sparse array. The method comprises the following steps: 1) target detection, (2) targetangle estimation, (3) target echo power sorting and normalization in different directions, (4) false interference covariance matrix construction, (5) self-adaptive weight calculation, (6) spatial spectrum recalculation based on the self-adaptive weight, and (7) false target identification after wave beam output normalization. The method and system have the advantages of grating lobe false targetavoidance, angle resolution improvement and the like.

Description

technical field [0001] The present invention relates to the technical field of automotive radar, in particular to a method, system, medium and equipment for identifying false targets of sparse array grating lobes of automotive millimeter-wave radar. Background technique [0002] In order to reduce casualties caused by traffic accidents, using radar and camera technology to improve the active safety performance of automobiles has become the direction of today's automobile manufacturing industry. At present, the car is mainly realized by its "eyes". There are four main types of mainstream car "eyes": ultrasonic radar, millimeter wave radar, lidar and high-definition camera. Among them, the millimeter wave radar refers to the radar working in the millimeter wave band. The radar is used to transmit radio to the surroundings, and the distance, direction and size of obstacles are calculated by measuring and analyzing the reflected waves. For automotive radar applications, it is n...

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Application Information

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IPC IPC(8): G01S13/32G01S13/931G01S7/41G01S7/292
CPCG01S7/292G01S7/415G01S13/32G01S13/931
Inventor 张伟张臣勇王帅何宁宇王平谭梦瑶
Owner 成都纳雷科技有限公司
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