Electromagnetic vector array parameter estimation method based on compressed sensing

An electromagnetic vector and array parameter technology, which is applied in the field of parameter estimation of vector arrays, and can solve problems such as inaccurate estimation and inability to break through Nyquist's law.

Active Publication Date: 2016-01-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Therefore, it is of great significance to use compressed sensing theory for vector array DOA estimation and polarization parameter estimation, which can overcome the shortcomings of traditional methods such as inaccurate estimation at low signal-to-noise ratios, and the inability to break through the Nyquist law for sampling.

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  • Electromagnetic vector array parameter estimation method based on compressed sensing
  • Electromagnetic vector array parameter estimation method based on compressed sensing
  • Electromagnetic vector array parameter estimation method based on compressed sensing

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[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the scope of the above-mentioned themes of the present invention is limited to the following examples and following methods. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0043] In this example, using The method solves the reconstruction matrix and estimates the parameters of the electromagnetic vector array based on compressive sensing, including the following specific steps:

[0044] Step 1. Establish a mathematical model of the array signal, such as figure 1 A uniform linear array of two orthogonal electric dipole pairs is shown:

[0045] A uniform linear array is formed by M two orthogonal electric dipole ...

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Abstract

The invention belongs to the technical field of array signal processing, and provides an electromagnetic vector array parameter estimation method based on compressed sensing. Particularly, the method applies a compressed sensing theory to estimation of a direction of arrival angle and polarization parameters of the electromagnetic vector array. Firstly, modeling is carried out on output of two orthogonal electric dipoles of an electromagnetic vector sensor in x axis and y axis respectively; then, an autocorrelation matrix and a cross correlation matrix are used for constructing observation signals, the observation signals and an over-complete base matrix are used for reconstructing an incident signal matrix, and in the reconstructed matrix, the direction of arrival corresponding to a non-zero element is the solved direction of arrival angle; and finally, according to the relationship between elements of the reconstructed matrix, polarization parameter estimation is obtained through calculation. When the method of the invention is applied, signal acquisition and processing can be carried out at an extremely low rate, the data storage cost and the signal processing cost are greatly reduced, and parameter estimation in conditions of few snapshots and low signal-to-noise ratio has good performance.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a method for estimating parameters of a vector array. Specifically, the compressive sensing theory is applied to an electromagnetic vector array to obtain direction of arrival (DOA) and polarization parameter estimation. Background technique [0002] Signal processing based on electromagnetic vector sensor array is a new branch of science, and has broad application prospects in the field of array signal processing. The space electromagnetic wave signal is a vector signal, and the complete electric field and magnetic field information is a six-dimensional complex vector. Most of the existing research focuses on single-polarization scalar arrays, and only obtains one-dimensional information in electromagnetic wave signals. The electromagnetic vector sensor can obtain all or at least one-dimensional information of the space electromagnetic wave signal, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/146
Inventor 李会勇张远芳许欣怡周正张泽恒
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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