Unlock instant, AI-driven research and patent intelligence for your innovation.

A Partially Sparse l-Matrix and Its Two-Dimensional DOA Estimation Method

A sparse, two-dimensional wave technology, used in radio wave direction/bias determination systems, direction finders using radio waves, etc. The effect of low cost and high direction finding accuracy

Inactive Publication Date: 2018-04-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing L-arrays are composed of conventional ULA (Uniform Linear Array), and there are relatively few L-arrays composed of sparse linear arrays. When dimensioning DOA, either a pairing algorithm is required, or a spectral peak search is required, and the advantages of sparse arrays cannot be fully utilized

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
  • A Partially Sparse l-Matrix and Its Two-Dimensional DOA Estimation Method
  • A Partially Sparse l-Matrix and Its Two-Dimensional DOA Estimation Method
  • A Partially Sparse l-Matrix and Its Two-Dimensional DOA Estimation Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0035] In order to take advantage of the larger array aperture of the sparse array and the translation invariance of the uniform linear array, the present invention proposes an L-array structure based on sparse ULA and conventional ULA, and then utilizes the characteristic that the cross-correlation matrix is ​​not affected by noise, the translation of ULA Invariance, defuzzification algorithm and LS (least squares) technique to solve 2D DOA. The present invention can be used in the fields of radar, sonar, wireless communication, etc. In order to better understand the present invention, the present application will be further described below in conjunction with the accompanying drawings.

[0036] Step 1: Build a sparse L matrix:

[003...

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 partially sparse L-array and its two-dimensional DOA estimation method. The invention includes two sub-arrays to form an L-array, the array element spacing of the first sub-array is half wavelength, and the array element spacing of the second sub-array is n times the wavelength; Auxiliary array elements whose distance is half the wavelength. In the DOA estimation process, the sub-arrays are placed on the x-axis and the z-axis respectively, and the cross-correlation of the received data is obtained by using the characteristic that the cross-correlation matrix is ​​not affected by noise, and the signal subspace is extracted; In the subspace, the rotation matrix of the z-axis array manifold matrix is ​​obtained, and the eigenvalues ​​of the rotation matrix are decomposed to obtain the possible estimated value of the pitch angle, and then the estimated result is deblurred based on the auxiliary array element; The estimation of the source waveform and the array flow pattern matrix of the x-axis are used to obtain the corresponding azimuth. The invention is used for radar, sonar, etc., and realizes low cost, low calculation amount and high direction finding accuracy.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication, and in particular relates to a partially sparse L array constructed by a linear array and a two-dimensional direction of arrival (DOA) estimation method thereof. Background technique [0002] Space-division multiple access technology is another key technology that can improve network capacity after time-division multiplexing, frequency-division multiplexing, and code-division multiplexing. The key to space-division multiple access is to accurately measure the signal source azimuth and form a highly directional beam. Therefore, the array signal processing technology with DOA estimation and digital beamforming as the core has received more and more research and attention from researchers. [0003] Most of the existing DOA estimation algorithms are based on the traditional full array, that is, the antenna array in which the distance between adjacent elements in the array is not...

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): G01S3/14
CPCG01S3/14
Inventor 郑植杨雨轩刘柯宏闫波杨海芬林水生葛琰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA