Millimeter wave radar angle super-resolution method

A millimeter-wave radar and super-resolution technology, applied in the field of millimeter-wave radar angle super-resolution, can solve problems such as limited increase in angular resolution, decrease in radar angular resolution, and impact on radar performance, so as to improve radar angular resolution and stabilize detection performance, the effect of increasing hardware cost

Pending Publication Date: 2021-06-25
长沙莫之比智能科技有限公司
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the size, power, and antenna design of the vehicle-mounted radar, the vehicle-mounted millimeter-wave radar cannot effectively distinguish multiple targets with the same radial distance, similar tangential distance, and similar speed in the long-distance mode. The angu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Millimeter wave radar angle super-resolution method
  • Millimeter wave radar angle super-resolution method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any transformation or replacement based on the teaching of the present invention belongs to the protection scope of the present invention.

[0033] The object of the present invention is to find a method to reduce the main lobe of the spatial spectrum and improve the angular resolution.

[0034] In view of this, the present invention proposes a millimeter-wave radar angle super-resolution method, which collects radar echo ADC signals and performs range FFT processing to obtain a one-dimensional range phase sequence, and processes to obtain a noise covariance matrix. Then, after the complex conjugate transformation is performed on the covariance matrix, it is added to the original covariance matrix to obtain a new covariance matrix. Singular value decomposition is performed on the covariance matrix to obtain the eigenva...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a millimeter wave radar angle super-resolution method. The method comprises the following steps: acquiring sampling data; performing FFT processing on the sampling data to obtain a distance phase sequence and a first signal covariance matrix; adding the first signal covariance matrix, and reconstructing to obtain a second signal covariance matrix; decomposing the second signal covariance matrix into a signal subspace matrix and a noise subspace matrix, and solving a weight vector; reconstructing a noise subspace matrix by using the weight vector, and processing a signal subspace matrix by using a generalized inverse matrix; and forming a spatial spectral density function equation by using the subspace matrix, wherein the angle is traversed to find a peak to estimate the angle. The millimeter wave radar is low in transmitting power, high in resolution and sensitivity and small in radar size, the MUSIC algorithm is optimized through information of the signal subspace and the noise subspace, the angular resolution is improved, and the detection capacity of the radar in a long-distance mode is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a millimeter-wave radar angle super-resolution method. Background technique [0002] In recent years, the application scope of vehicle-mounted millimeter-wave radar has been greatly expanded, and millimeter-wave radar is widely used in blind spot alarm, reversing warning and assisted driving. However, limited by the size, power, and antenna design of the vehicle-mounted radar, the vehicle-mounted millimeter-wave radar cannot effectively distinguish multiple targets with the same radial distance, similar tangential distance, and similar speed in the long-distance mode. As a result, the angular resolution of the radar is reduced, which affects the performance of the radar. The main lobe of the spatial spectrum formed by the commonly used MUSIC algorithm is large, and it is easy to cover up two targets with similar angles, and the improvement of the diagonal resolution is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S7/02G01S13/931G06F17/14G06F17/15G06F17/16
CPCG01S7/02G01S13/931G06F17/142G06F17/156G06F17/16
Inventor 张习之
Owner 长沙莫之比智能科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap