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

Method for carrying out low-complexity angle estimation by using co-prime linear array

A low-complexity, angle estimation technology, applied in the field of spatial spectrum estimation, can solve the problem of the reduction of spatial degrees of freedom, achieve high degrees of freedom, low computational complexity, and avoid the effect of spatial smoothing process

Inactive Publication Date: 2019-04-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the defuzzification method can obtain better estimation performance than the uniform linear array, but the method of using two sub-arrays for angle estimation makes the spatial degree of freedom greatly reduced

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 carrying out low-complexity angle estimation by using co-prime linear array
  • Method for carrying out low-complexity angle estimation by using co-prime linear array
  • Method for carrying out low-complexity angle estimation by using co-prime linear array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Below in conjunction with accompanying drawing and specific embodiment the technical solution of the present invention is described in further detail:

[0020] The present invention proposes a method for angle estimation using a coprime line array. The array antenna structure used in this method is composed of two uniform line arrays with the number of array elements being 2M and N respectively, and the distance between the array elements is Nλ / 2 and Mλ respectively. / 2, where M and N are co-prime numbers and M

[0021] 1. Data model

[0022] Such as figure 1 Shown is an example of a coprime linear array where M=3 and N=4,...

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 carrying out low-complexity angle estimation by using a co-prime linear array. The method comprises the steps of: firstly, carrying out vectorization processing ona covariance matrix of an array received signal, deleting redundant rows and intercepting a continuous array element part to obtain a received signal of a virtual uniform linear array with an array element interval of half of lambda; then carrying out DFT (Discrete Fourier Transform) on the virtual received signal and finding out positions of K maximum peak values (K represents an information source number), so that initial estimation of a DOA (Direction Of Arrival) can be obtained; and finally, carrying out DFT on the virtual received signal subjected to phase rotation, searching a rotationphase eta in a small range, respectively finding out a rotation phase which enables the K peak values to be shrunk to the maximum, and obtaining accurate estimation of the DOA hereby. According to theinvention, DFT and a DOA estimation problem of the co-prime linear array are combined, the virtual received signal does not need to be subjected to decorrelation processing, a relatively high space freedom degree can be obtained, and meanwhile, the method has low calculation complexity and high estimation accuracy.

Description

technical field [0001] The invention relates to the field of space spectrum estimation, in particular to a method for low-complexity angle estimation using a coprime linear array. Background technique [0002] At present, an array antenna layout called a coprime array has been paid attention to. This array structure breaks through the half-wavelength limitation of the traditional antenna array element spacing, which greatly expands the antenna aperture and improves the performance of angle estimation. . [0003] There are two methods of angle estimation using coprime linear arrays: defuzzification and virtualization. Among them, the defuzzification method can obtain better estimation performance than the uniform linear array, but the method of using two sub-arrays for angle estimation makes the spatial degree of freedom greatly reduced. The virtualization method can obtain a higher degree of spatial freedom than the actual number of array elements, which greatly increases ...

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): G01S3/14
CPCG01S3/14
Inventor 张小飞汪云飞沈金清郑旺施展
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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