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

Portable high-frequency ground wave radar radio frequency interference inhibition method

A high-frequency ground wave radar and radio frequency interference technology, applied in the field of radar interference, can solve the problems of lack of polarization information, beam width, etc., and achieve the effects of strong correlation, good suppression effect, and good suppression effect

Inactive Publication Date: 2018-01-09
WUHAN UNIV
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but due to the wide beam of portable HF SWR and the lack of polarization information, these methods will fail

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
  • Portable high-frequency ground wave radar radio frequency interference inhibition method
  • Portable high-frequency ground wave radar radio frequency interference inhibition method
  • Portable high-frequency ground wave radar radio frequency interference inhibition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] This embodiment is realized by adopting the following technical scheme, a portable high-frequency ground wave radar radio frequency interference suppression method, the high-frequency ground wave radar uses two monopole cross-loops as receiving antennas; each monopole cross-loop antenna A monopole antenna and two crossed loop antennas are included; the radio frequency interference suppression method includes the following steps:

[0023] Step 1. Perform channel calibration on two monopole cross-loop antennas;

[0024] Step 2, in each sweep cycle, identify radio frequency interference;

[0025] Step 3, in the frame period in which there is interference, first, for the monopole antenna channels of the two monopole cross-loop antennas, the data matrix of the interference is constructed using the data of the long-distance element; then the covarian...

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 relates to the radar interference technology field, and concretely relates to a portable high-frequency ground wave radar radio frequency interference inhibition method. Two monopole crossed rings are adopted by a high frequency ground wave radar receiver to serve as reception antennas. After channel calibration, radio frequency interference takes place in monopole channels of the two monopole crossed rings and in two respective crossed ring channels. A spatial domain subspace projection method is adopted to realize interference inhibition: setting a threshold and determining whether each frame includes radio frequency interference; and for frame periods with radio frequency interference, obtaining a radio frequency interference sample through signals of long-distance elements only containing interference, extracting a sub-space of radio frequency interference through Eigen value decomposition, and for signals of near-distance elements containing radio frequency interference and sea state information, projecting the signals onto an orthogonal sub-space of the sub-space of radio frequency interference to inhibit interference. The method has a great inhibition effect for dense radio frequency interference, and ensures that arrival angle results of monopole crossed ring antennas, estimated by a MUSIC algorithm, are reliable after interference inhibition.

Description

technical field [0001] The invention belongs to the technical field of radar interference, and in particular relates to a method for suppressing radio frequency interference of a portable high-frequency ground wave radar. Background technique [0002] High-frequency surface wave radar is widely used in the inversion of ocean surface parameters such as current field, wave height spectrum, and wind information, and can provide useful ocean state information in large areas of the ocean in real time. Since the CODAR company proposed the monopole cross-loop receiving antenna, the portable high-frequency ground wave radar has been widely used. However, since a large number of high-frequency radio devices share high-frequency bands, high-frequency ground wave radars face a very important problem of radio frequency interference. High-frequency radio frequency interference is very frequent and often covers up useful echo signals, including sea state and hard targets. Therefore, it i...

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 Applications(China)
IPC IPC(8): G01S7/02G01S7/36
Inventor 文必洋田震赵久瑞王思捷李子言
Owner WUHAN 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