Signal two-dimensional DOA and frequency joint estimation method applied to L-type array

A technology of joint estimation and DOA, applied in frequency measurement devices, direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve high complexity problems, achieve small calculation, low capacity requirements, and easy Achieved effect

Pending Publication Date: 2019-01-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is generally complex, especially when the signal r

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
  • Signal two-dimensional DOA and frequency joint estimation method applied to L-type array
  • Signal two-dimensional DOA and frequency joint estimation method applied to L-type array
  • Signal two-dimensional DOA and frequency joint estimation method applied to L-type array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The invention proposes a method for jointly estimating two-dimensional DOA and frequency for non-coherent signals received by an L-shaped array. In this method, in order to estimate the frequency of the received signal, the signal is received with multi-level time delay, and the multi-level time-delay output signal is constructed as a parallel factor trilinear model. In order to reduce the complexity of decomposing the model, the algorithm combines the theory of compressed sensing to compress the model in blocks, and then uses the trilinear alternating least squares algorithm to decompose the model to obtain the estimation of the signal parameter matrix, and The two-dimensional DOA and frequency estimation of the signal are obtained from the obtained parameter matrix. The algorithm can be applied to uniform L-matrix and non-uniform L-matrix at the same time, and during the decomposition process, the parameter matrix has the same column ambiguity, so the angle and freque...

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 signal two-dimensional DOA and frequency joint estimation method applied to an L-type array. The method comprises the following steps of (1) constructing a signal received bythe L-type array to a parallel factor trilinear model; (2) carrying out elementary row transformation on the model and carrying out block compression according to a compressed sensing theory; (3) using a trilinear alternating least square algorithm to carry out cyclic iterative decomposition on the compressed model until convergence so as to obtain the estimation of a parameter matrix; and (4) constructing the complete dictionary of frequency and angle estimations, and successively using a sparse recovery method to obtain the frequency and two-dimensional DOA estimations of a signal. The method has advantages that (1) the method is suitable for a uniform L array and a non-uniform L array, and the array is easy to realize during an actual application; (2) the calculated amount of an algorithm in the invention is small and simultaneously a capacity requirement to data storage is low; and (3) in the algorithm of the invention, by means of the parallel factor model, paired angle and frequency estimations can be acquired, and extra pairing does not need to be performed.

Description

technical field [0001] The invention relates to the technical field of array signal processing multi-parameter joint estimation, in particular to a signal two-dimensional DOA and frequency joint estimation method applied to an L-shaped array. Background technique [0002] In recent years, array signal processing has developed rapidly in many fields such as radar, sonar, and wireless communication. As an important research direction in array signal processing, multi-parameter joint estimation of received signals has also been widely recognized by relevant scholars. focus on. Array received signals usually contain information such as DOA and Doppler frequency. How to accurately obtain the joint estimation of these parameters from received signals has become a hot spot in the research of array signal processing algorithms. [0003] In recent years, scholars at home and abroad have proposed many algorithms for joint estimation of received signal DOA and frequency. These includ...

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): G01S3/14G01R23/02
CPCG01R23/02G01S3/14
Inventor 徐乐张小飞施展时娜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap