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

Approximate fractal detection method for targets in fractional fourier transformer (FRFT) region sea clutter

A detection method and sea clutter technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as poor target detection performance, and achieve the effect of reducing the demand for signal-to-noise ratio, being easy to implement, and improving real-time performance.

Active Publication Date: 2013-07-17
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of applying the single fractal theory, the main object is the time-domain signal amplitude, analyze the change of the signal structure and find a suitable single fractal parameter for target detection. When the sea situation is high, the target detection performance is poor

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
  • Approximate fractal detection method for targets in fractional fourier transformer (FRFT) region sea clutter
  • Approximate fractal detection method for targets in fractional fourier transformer (FRFT) region sea clutter
  • Approximate fractal detection method for targets in fractional fourier transformer (FRFT) region sea clutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings. With reference to the accompanying drawings in the description, the specific implementation of the present invention is divided into the following steps:

[0017] (1) Input the radar sea clutter experimental data acquired in advance into computing device 1 to carry out FRFT processing to obtain the FRFT spectrum of the sea clutter. In this step, the acquisition of radar experimental data can adopt the following method: the radar is pre-scanned before the application of the present invention. For a period of time on the sea surface, the radar zero-IF frequency I / Q two-way sea echo data is accepted and stored as radar experimental data; the transformation order used for FRFT in device 1 is the empirical transformation order, and the rough value range is generally [0.7 , 1.3].

[0018] (2) The calculation device 2 receives the sea clutter FRFT spectrum obtained b...

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 an approximate fractal detection method for targets in a fractional fourier transformer (FRFT) region sea clutter and belongs to the field of radar signal processing. In the existing method for detecting targets in the sea clutter by utilizing the single fractal characteristics, radar time domain echo sequences are directly processed, and the detection performance on the targets moving slightly under strong sea clutter is poor. By means of the approximate fractal detection method, FRFT and the single fractal processing method are ingeniously combined, the advantages of the FRFT for effectively improving the signal to clutter ratio of the targets moving on the sea surface and the characteristics of easy and convenient feature calculation and high accuracy of the signal fractal processing method can be comprehensively utilized, and single Hurst indexes of sea clutter FRFT spectrums can be extracted within the permissible error range for target detection. A detector comprehensively utilizes the advantages of phase-coherent accumulation and the single fractal theory and has good distinguishing capability on the targets moving slightly in the sea clutter, and simultaneously the approximate fractal detection method is suitable for target signal tracking in non-uniform fractal clutter and has wide application value.

Description

1. Technical field [0001] The invention relates to a method for target detection using the approximate single fractal feature of the sea clutter fractional Fourier transform spectrum in the field of radar signal processing, that is, an approximate fractal detection method for targets in sea clutter in the FRFT domain, wherein FRFT is a English abbreviation for Fourier transform. The invention is applicable to various coherent radar signal processing systems for sea imaging reconnaissance and warning. 2. Background technology [0002] The traditional Fourier transform is a standard tool for analyzing and processing stationary signals, but it is weak for analyzing and processing time-varying non-stationary signals. With the development of information science, non-stationary signal processing has gradually attracted attention, and the limitations of Fourier analysis have also become more prominent. In response to this problem, researchers have proposed and developed a series ...

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): G01S7/41
Inventor 关键刘宁波陈小龙黄勇包中华柴勇王国庆何友
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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