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

2q-order nested array DOA estimation method based on multi-frequency high-order cumulant

A high-order cumulant, nested array technology, applied in radio wave measurement systems, direction finders using radio waves, radio wave direction/bias determination systems, etc. Array elements can not be used, matrix filling complex operations and other problems, to achieve the effect of increased degrees of freedom, expanded degrees of freedom, and strong operability

Active Publication Date: 2018-12-18
AIR FORCE UNIV PLA
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are holes in the high-order virtual array formed by the nested array based on the high-order cumulant, which makes some virtual array elements unusable
For this problem, there are currently two solutions. One is to use only the continuous virtual array elements and discard the discrete virtual array elements, but it is obvious that some effective degrees of freedom are wasted; the second is to fill in the missing holes through matrix filling. In this way, the discrete array elements are connected, but the matrix filling requires complex operations
In recent years, a multi-frequency array DOA estimation method has been proposed, but it is only used in the DOA estimation method based on the second moment, and has not been applied to the field of high-order cumulants.

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
  • 2q-order nested array DOA estimation method based on multi-frequency high-order cumulant
  • 2q-order nested array DOA estimation method based on multi-frequency high-order cumulant
  • 2q-order nested array DOA estimation method based on multi-frequency high-order cumulant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] refer to figure 1 , an embodiment of the present invention provides a 2q-order nested array DOA estimation method based on a multi-frequency high-order cumulant, the method comprising the following steps:

[0024] Step 1. Construct a high-order cumulant matrix and a high-order difference matrix

[0025] For a linear array with N array elements, its received signal can be expressed as:

[0026]

[0027] where s d (t)(d=1,2,...,D) is the source sign...

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 2q-order nested array DOA estimation method based on a multi-frequency high-order cumulant, and relates to the technical field of radar signal and information processing. Forthe problem that virtual array elements cannot be fully utilized due to the occurrence of voids in the prior art, the voids in an original high-order virtual array are filled with the virtual array elements generated by multi-frequency signals to form a continuous uniform linear array with higher degree of freedom, so that the DOA estimation performance is improved.

Description

technical field [0001] The invention relates to the technical field of radar signal and information processing, in particular to a 2q-order nested array DOA estimation method based on multi-frequency high-order cumulants. Background technique [0002] Direction of arrival (DOA) estimation aims to achieve high-precision target angle measurement. Compared with the classical uniform array, the sparse array has higher degrees of freedom and lower redundancy, so in DOA estimation It has received extensive attention and research. Typical sparse matrices include minimum redundant matrix, minimum void matrix, coprime matrix, nested matrix, etc. proposed in recent years, among which the process of solving the matrix of minimum redundancy matrix and minimum void matrix is ​​complicated and has no closed solution, so it is difficult to be practical . The coprime array and nested array have a closed array element position expression, which can achieve a higher degree of freedom under ...

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): G01S3/14G01S7/02
CPCG01S3/14G01S7/02
Inventor 周豪胡国平师俊朋张秦冯子昂刘梦波
Owner AIR FORCE 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