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

Range ambiguity clutter suppression method for airborne front view frequency diversity array radar

A frequency diversity array, clutter suppression technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as distance ambiguity and distance dependence, and achieve the effect of improving suppression performance and suppressing distance ambiguity clutter.

Inactive Publication Date: 2017-01-04
XIDIAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the spatial frequency domain, the clutter in the unambiguous distance zone and the clutter in the ambiguous distance zone are distinguished, and the quadratic distance-dependent compensation is combined with the traditional clutter spectrum compensation method to solve the problem of distance dependence and range ambiguity at the same time

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
  • Range ambiguity clutter suppression method for airborne front view frequency diversity array radar
  • Range ambiguity clutter suppression method for airborne front view frequency diversity array radar
  • Range ambiguity clutter suppression method for airborne front view frequency diversity array radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing:

[0035] refer to figure 2 , is a schematic diagram of the geometric model and echo receiving process of the airborne front-facing frequency diversity array radar of the present invention. The height of the carrier (platform height) is H, the speed of the carrier is V, the number of coherent pulses received by the airborne front-view frequency diversity array radar is K, and the coherent pulse interval of the signal transmitted by the airborne front-view frequency diversity array radar is T r , the pulse repetition frequency f of the transmitted signal of the airborne front-view frequency diversity array radar r =1 / T r .

[0036] In the airborne front-view frequency diversity array radar, the frequency diversity array is a uniform linear array composed of N omnidirectional elements, and the distance between the elements in the frequency diversity array is d. The carrier ...

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 belongs to the technical field of radar clutter suppression, and particularly relates to an airborne forward-looking frequency diversity array radar distance fuzzy clutter suppression method. The method comprises the following specific steps: acquiring the echo space-time snapshot data xc of an airborne forward-looking frequency diversity array radar; determining the secondary distance dependence compensation vector of a non-fuzzy distance region and the secondary distance dependence compensation vector of a fuzzy distance region; acquiring a secondary distance dependence compensation vector in an airspace-Doppler combined frequency region; acquiring echo space-time snapshot data after secondary distance dependence compensation; performing space-time adaptive processing on the echo space-time snapshot data after secondary distance dependence compensation of the non-fuzzy distance region and the echo space-time snapshot data after secondary distance dependence compensation of the fuzzy distance region respectively.

Description

technical field [0001] The invention belongs to the technical field of radar clutter suppression, and in particular relates to a method for suppressing range ambiguity clutter of an airborne front-view frequency diversity array radar, which is mainly used for distinguishing clutter in an unambiguous range zone and clutter in an ambiguous range zone in a spatial frequency domain. Background technique [0002] Space-time adaptive processing (STAP) has important application value in airborne early warning radar, which can combine time and space information to detect targets from clutter and interference. In the airborne side-looking array radar, the coupling relationship between the airspace frequency and Doppler frequency of clutter does not change with the distance. However, in some special airborne radar applications (such as forward-looking array airborne radar, circular array airborne radar, etc.), the distance invariance of clutter distribution is no longer established, a...

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): G01S7/36
Inventor 朱圣棋廖桂生许京伟张俊张骏杰王震宋萌萌
Owner XIDIAN 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