Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining first-order echo spectrum boundary and second-order echo spectrum boundary of high-frequency ground wave radar based on azimuth angle

A high-frequency ground wave radar and a technology to determine the method, applied in radio wave measurement systems, instruments, etc., can solve the problem of unrealistic adjustment of the difference spectrum method, achieve excellent performance, and save the effect of parameter tuning process

Pending Publication Date: 2020-10-09
NANCHANG UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of radar operation, it is unrealistic to artificially adjust the parameters of the difference spectrum method frequently

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
  • Method for determining first-order echo spectrum boundary and second-order echo spectrum boundary of high-frequency ground wave radar based on azimuth angle
  • Method for determining first-order echo spectrum boundary and second-order echo spectrum boundary of high-frequency ground wave radar based on azimuth angle
  • Method for determining first-order echo spectrum boundary and second-order echo spectrum boundary of high-frequency ground wave radar based on azimuth angle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, not for limit the invention.

[0033] Combine below Figure 1 to Figure 7 Introduce the specific implementation process of the present invention:

[0034] Step 1: Determine the first-order Bragg peak and second-order singular peak in the radar echo spectrum according to the radar operating parameters;

[0035] The radar echo spectrum described in step 1 is the echo signal spectrum that varies with distance and Doppler frequency obtained by undergoing two Fourier transforms of the echo received by the radar. In this spectrum, the first-order Bragg peak and second-order singular peak frequencies can be expres...

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 method for determining a first-order echo spectrum boundary and a second-order echo spectrum boundary of high-frequency ground wave radar based on an azimuth angle, and belongs to the technical field of marine environment monitoring of the high-frequency ground wave radar. The first-order echo spectrum boundary and second-order echo spectrum boundary determining method isbased on the following characteristics of azimuth angles of ocean echoes: 1, for the first-order echoes, the closer the Doppler frequency is, the closer the azimuth angles of frequency points are; 2,in the vicinity of the boundary of the first-order echo spectrum and the second-order echo spectrum, along with the transition of a signal from a first-order echo signal to a second-order echo signal, the change trend of the azimuth angle of the signal is opposite to the change trend of the azimuth angle in the first-order echo spectrum; and 3, as long as a second-order spectrum exists in the echo spectrum, the two characteristics do not change along with the change of the sea condition. Therefore, the boundary of the first-order echo and the second-order echo can be determined by analyzing the azimuth angle of each frequency point between a first-order Bragg peak and a second-order singular peak. Compared with an existing method, the method has the greatest characteristic of being suitable for different sea condition conditions.

Description

technical field [0001] The invention belongs to the technical field of high-frequency ground-wave radar marine environment monitoring, especially related to the extraction method of the first-order and second-order ocean echo spectrum in high-frequency ground-wave radar, and specifically relates to a high-frequency ground-wave radar based on azimuth The method for determining the dividing line of the first-order and second-order echo spectra. Background technique [0002] High-frequency ground-wave radar uses high-frequency electromagnetic waves of 3 to 30 MHz to diffract along the ocean surface to achieve over-the-horizon detection of the ocean surface. High-frequency ground wave radar can detect wind, wave and current information on the ocean surface, especially the large-scale, high-time and spatial-resolution ocean surface flow field information output by radar is being widely used in ocean research, ocean forecasting, coastal under management. In addition, high-freque...

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): G01S7/41G01S7/02
CPCG01S7/418G01S7/021
Inventor 赖叶平王玉皞
Owner NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com