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Parameter Estimation Method for Spatial Stretch Electromagnetic Vector Sensor Array

A sensor array, electromagnetic vector technology, applied in the field of signal processing, can solve problems involving less space stretching electromagnetic vector sensor array and so on

Inactive Publication Date: 2016-06-08
XIDIAN UNIV
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Problems solved by technology

[0004] Most of the current research is based on co-point electromagnetic vector sensor arrays, and few involve space-stretched electromagnetic vector sensor arrays

Method used

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  • Parameter Estimation Method for Spatial Stretch Electromagnetic Vector Sensor Array
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  • Parameter Estimation Method for Spatial Stretch Electromagnetic Vector Sensor Array

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Embodiment Construction

[0044] In order to make the above and other objects, features and advantages of the present invention more apparent, the following specifically cites the embodiments of the present invention, together with the accompanying drawings, for a detailed description as follows.

[0045] The basic train of thought of the method of the present invention is: represent the signal steering vector as the product form of the spatial domain function matrix and the polarization domain function vector, utilize the characteristic that the polarization domain function modulus is 1, convert the MUSIC spectrum into the form of the Rayleigh entropy function, Using the Rayleigh-Ritz entropy theorem of self-conjugate matrices, the four-dimensional MUSIC search is converted into two two-dimensional searches, and then the angle of arrival and polarization parameters are estimated separately, thereby reducing the amount of computation.

[0046] The above is the core idea of ​​the present invention. The t...

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Abstract

The invention provides a method for estimating parameters of a space stretching electromagnetic vector sensor array. The method comprises the steps of receiving K unrelated incoming signals through a receiving array, and constructing guide vectors of the incoming signals corresponding to the array; expressing the guide vectors of the incoming signals as a product of a spatial domain function array and a polarizational domain function vector; computing a covariance matrix of the received data; analyzing features of the covariance matrix of the received data to obtain signal subspace and noise subspace; constructing a multi-signal classified MUSIC spatial-polarizational domain combination zero spectrum function, and maximizing the spatial-polarizational domain combination zero spectrum function; performing MUSIC dimension reduction process to separate a spatial domain spectrum and a polarizational domain spectrum by means of the self-conjugate moment Rayleigh-Ritz entropy theorem, performing traversal search within value ranges of variables and estimating signal parameters. By means of the method, four-dimensional MUSIC search is transformed into two-dimensional spatial domain search and two-dimensional polarizational domain search, and therefore, calculated quantity is decreased.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a method for estimating parameters of a space-stretched electromagnetic vector sensor array. Background technique [0002] Electromagnetic vector sensor array is a new type of array that can obtain electromagnetic signal space and polarization domain information. With the rapid development of wireless communication services, scholars have achieved many valuable research results in parameter estimation based on electromagnetic vector sensor arrays, and proposed orthogonal dipole pairs, orthogonal tripoles, and orthogonal three magnetic rings. , full electromagnetic vector sensor and other types of electromagnetic vector sensor array parameter estimation algorithms. However, these algorithms are mainly based on ESPRIT algorithm for array multi-parameter estimation, and there are few reports on the direct use of MUSIC algorithm for estimation of angle of arrival and polar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/46
Inventor 王兰美曾操王书振赵文娟王桂宝
Owner XIDIAN UNIV
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