A method and system for estimating range-velocity spectrum of millimeter-wave radar

A millimeter-wave radar and velocity spectrum technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as low signal-to-noise ratio of range-velocity spectrum, affecting the ability of millimeter-wave radar to detect long-distance or small targets, and target missed detection , to achieve the effect of improving the target signal-to-noise ratio, improving the target detection ability, suppressing noise and frequency leakage

Active Publication Date: 2021-12-17
巍泰技术(武汉)有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the millimeter wave radar constructs the range-velocity spectrum by performing two-dimensional Fourier transform on the collected data of multiple chirps, and then uses the peak search algorithm to detect the target. Although this method is convenient to implement, The advantage of simple calculation, but its suppression effect on noise and interference signals is poor, resulting in a low signal-to-noise ratio of the range-velocity spectrum. For targets with long distances or small distances, it is easy to cause the phenomenon of missed detection and false detection of targets, which affects The ability of millimeter-wave radar to detect long-distance or small targets
In order to solve this problem, it is necessary to increase the transmission power of the radar, but this brings disadvantages such as high power consumption and large electromagnetic wave pollution.

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
  • A method and system for estimating range-velocity spectrum of millimeter-wave radar
  • A method and system for estimating range-velocity spectrum of millimeter-wave radar
  • A method and system for estimating range-velocity spectrum of millimeter-wave radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] figure 1 It is a schematic flow chart of a millimeter-wave radar range-velocity spectrum estimation method provided by an embodiment of the present invention, as shown in figure 1 shown, including:

[0045] 101. Acquire an intermediate frequency signal and sample the intermediate frequency signal;

[0046] 102. Perform windowing processing and transformation on the sampled signal to construct an autocorrelation matrix;

[0047] 103. Calculate the inverse matrix of the autocorrelation matrix, and calculate the range velocity frequency spectrum according to the inverse matrix and the principle of minimum variance without distortion.

[0048] Specifically, in ste...

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 present invention provides a method and system for estimating the range-velocity spectrum of a millimeter-wave radar. The method includes: acquiring an intermediate frequency signal and sampling the intermediate frequency signal; performing windowing processing and transformation on the sampled signal to construct an autocorrelation matrix; obtaining the The inverse matrix of the autocorrelation matrix is ​​described, and the range velocity frequency spectrum is solved according to the inverse matrix and the principle of minimum variance without distortion. The millimeter-wave radar range-velocity spectrum estimation method and system provided by the embodiments of the present invention utilize the principle of minimum variance without distortion, and effectively suppress the influence of noise and frequency leakage while ensuring that the estimated range-velocity frequency point signal is output without distortion. Compared with the traditional two-dimensional Fourier transform method, it can effectively improve the target signal-to-noise ratio, and the simulation shows that the signal-to-noise ratio can be increased by about 2dB, so it can effectively improve the target detection ability of the millimeter-wave radar.

Description

technical field [0001] The present invention relates to the technical field of radio wave distance measurement and speed measurement, and more specifically, to a method and system for estimating range velocity spectrum of millimeter wave radar. Background technique [0002] With the rapid development of millimeter-wave integrated circuits and the rapid growth of demand in fields such as smart cities, smart transportation, and autonomous driving, millimeter-wave radar sensors are being used more and more widely. The current millimeter-wave radar sensors are mainly divided into two types: continuous wave radar and frequency modulation continuous wave radar, and frequency modulation continuous wave radar has been widely used because of its advantages of both speed measurement and distance measurement. The radar that uses frequency-modulated continuous wave technology to measure the distance and speed of multiple targets in a specific area is the millimeter-wave radar that is wi...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 褚兆飞刘景顺陈瑞
Owner 巍泰技术(武汉)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