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False target recognition method and system for automotive millimeter-wave radar sparse array grating lobes

A millimeter-wave radar and false target technology, applied in the field of automotive radar, can solve the problems of affecting processing, radar detection target scene confusion, affecting assisted driving and automatic driving, etc., and achieve the effect of improving angular resolution

Active Publication Date: 2021-09-03
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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  • False target recognition method and system for automotive millimeter-wave radar sparse array grating lobes
  • False target recognition method and system for automotive millimeter-wave radar sparse array grating lobes
  • False target recognition method and system for automotive millimeter-wave radar sparse array grating lobes

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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 a method and system for identifying false targets of grid lobes with sparse arrays of automotive millimeter-wave radars, belonging to the technical field of automotive radars, and is used to solve the problem of false targets of grid lobes caused by the use of sparse arrays in current automotive radars. The method includes steps: 1) Target detection; 2) Target angle estimation; 3) Sorting and normalizing target echo power in different directions; 4) Constructing false interference covariance matrix; 5) Calculating adaptive weights; Calculate the spatial spectrum; 7) Perform false target recognition after the beam output is normalized. The invention has the advantages of avoiding grating lobe false targets, improving angular resolution 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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