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

Uniform circular array differential phase based single distributed source DOA estimation method

A uniform circular array and differential phase technology, applied in direction finders using radio waves, components of radio wave directors, etc., can solve the problems of reduced complexity, high hardware complexity of the array structure, unfavorable engineering practices, etc., to achieve High-precision estimation, avoiding spectral peak search and eigenvalue decomposition operations, and reducing complexity

Inactive Publication Date: 2018-04-13
THE PLA INFORMATION ENG UNIV
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, some scholars considered a uniform cylindrical array (UCyA for short) composed of multiple UCAs, and proposed a low-complexity two-dimensional DOA estimation method in beam space. The GMUSIC method is similar, but the calculation is performed in the beam domain, and the central azimuth angle estimation is obtained through the beam space GMUSIC (beamspace GMUSIC, abbreviated as BS-GMUSIC) method, which has low computational complexity
However, in the above method, the complex peak search and eigenvalue decomposition operations are still unavoidable, so the complexity still needs to be reduced
In addition, the SOS, GMUSIC and BS-GMUSIC methods all require multiple UCAs, and the hardware complexity of the array structure is high, which is not conducive to engineering practice

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
  • Uniform circular array differential phase based single distributed source DOA estimation method
  • Uniform circular array differential phase based single distributed source DOA estimation method
  • Uniform circular array differential phase based single distributed source DOA estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a single distributed source DOA estimation method based on uniform circular array differential phase of the present invention includes:

[0043] Step S101: Calculate the corresponding covariance matrix through the output signals of each array element of the uniform circular array.

[0044] Step S102: extracting the strictly upper triangular element phase of the covariance matrix, and performing vectorization processing to obtain a difference phase vector.

[0045] Step S103: Obtain the central azimuth angle estimation and central elevation angle estimation of the single-distributed source by least square estimation.

Embodiment 2

[0047] Such as figure 2 As shown, another kind of single distribution source DOA estimation method based on uniform circular array differential phase of the present invention comprises:

[0048] Step S201: Sampling the original observation data of each array element of the uniform circular array.

[0049] Step S202: Calculate the corresponding covariance matrix through the output signals of each array element of the uniform circular array.

[0050] Step S203: extracting the strictly upper triangular element phase of the covariance matrix, and performing vectorization processing to obtain a difference phase vector.

[0051] Step S204: Obtain the central azimuth angle estimation and central elevation angle estimation of the single-distributed source by least square estimation.

[0052] details as follows:

[0053] 1) Establish a distributed source model, and sample the original observation data of each array element of the uniform circular array

[0054] Such as image 3 T...

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 technical field of array signal processing technology, especially relates to DOA (Direction Of Arrival) estimation of a wireless signal source, and particularly relates toa uniform circular array differential phase based single distributed source DOA estimation method. The method includes calculating a corresponding covariance matrix through output signals of different array elements of the uniform circular array; extracting exact upper triangular element phases of the covariance matrix and performing vectorization treatment, and obtaining a differential phase vector; obtaining single distributed source central azimuth angle estimation and central pitch angle estimation through least squares estimation. According to the invention, a two-dimensional DOA closed-form solution is obtained directly through the least squares method, spectrum peak search and eigenvalue decomposition calculation are avoided and complexity is reduced substantially.

Description

technical field [0001] The present invention relates to the technical field of array signal processing, in particular to DOA estimation for wireless signal sources, in particular to a single-distributed source DOA estimation method based on uniform circular array differential phase. Background technique [0002] In the application fields such as radar, sonar and mobile communication, the transmitted signal is often affected by scattering and reflection in complex environments, so that the signal energy received by the antenna array presents a certain distribution in a certain range of space. At this time, the performance of the traditional direction of arrival (DOA) estimation algorithm based on the assumption of the point source model will seriously deteriorate, and a parameterized distributed source model needs to be used for processing. According to whether different path components of the same source are correlated, distributed sources mainly include two types: coherentl...

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): G01S3/12
CPCG01S3/12
Inventor 代正亮巴斌崔维嘉王大鸣张彦奎逯志宇
Owner THE PLA INFORMATION ENG 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