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Fast polarization-DOA estimation method based on beam forming

A DOA, -DOA technology, applied in the field of fast polarization-DOA estimation based on beamforming, can solve the problems of large amount of calculation and inability to quickly perform DOA estimation

Pending Publication Date: 2020-03-24
HARBIN INST OF TECH AT WEIHAI +1
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Problems solved by technology

[0005] The present invention aims to solve the technical problem that the existing multiple signal classification algorithm estimates the signal parameters of a uniform linear array composed of dipole array elements, the calculation amount is huge, and the DOA estimation cannot be performed quickly, and provides a method that reduces the calculation amount and improves Beamforming-based Fast Polarization-DOA Estimation Method for Velocity

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  • Fast polarization-DOA estimation method based on beam forming
  • Fast polarization-DOA estimation method based on beam forming
  • Fast polarization-DOA estimation method based on beam forming

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Embodiment Construction

[0064] Referring to the accompanying drawings, the present invention will be further described in detail with specific embodiments.

[0065] refer to figure 1 The structure diagram of the polarization-sensitive uniform linear array of the dipole array element in the present invention is shown, the dipole array element adopts the uniform linear array mode, and the signal incident direction is defined as shown by the arrow in the figure.

[0066] refer to figure 2 , is a schematic diagram of vertical and horizontal dipole beam weighting in the method of the present invention, that is, beamforming is performed on subarrays composed of vertical and horizontal dipoles respectively.

[0067] The fast polarization-DOA estimation method based on beamforming includes the following steps:

[0068] Step 1. For N signals incident to the array composed of M dipole array elements, the signal model is established as:

[0069] X(t)=As(t)+n(t) (1)

[0070] In formula (1):

[0071] A=[a ...

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Abstract

The invention relates to a fast polarization-DOA estimation method based on beam forming. The method solves the technical problems that when the signal parameter estimation is carried out on a uniformlinear array formed by dipole array elements through an existing multi-signal classification algorithm, the calculation amount is huge, and the DOA estimation cannot be carried out rapidly, and comprise the steps of constructing an array number signal model for a dipole array element polarization sensitive uniform linear array; respectively carrying out beam forming on the vertical and horizontaldipoles, carrying out coarse estimation on the polarization and DOA parameters of an incident signal, and carrying out spectral peak search in a small range of a coarse estimation result by utilizinga MUSIC algorithm, thereby realizing the accurate estimation to the polarization and DOA parameters of the incident signal. The method is widely applied to the technical field of array signal direction finding.

Description

technical field [0001] The invention relates to the technical field of array signal direction finding, in particular to a fast polarization-DOA estimation method based on beamforming. Background technique [0002] Direction of arrival (DOA) estimation is widely used in radar, sonar, wireless communication, passive positioning, navigation, earthquake detection and other fields. [0003] The uniform linear array composed of dipole array elements is a relatively common polarization-sensitive array. It has a simple structure and is sensitive to the polarization information of the signal. It can simultaneously estimate the 1-dimensional DOA (direction of arrival) and 2-dimensional Polarization parameters. Moreover, compared with the scalar uniform linear array, the dipole element uniform linear array can make full use of the polarization difference between electromagnetic wave signals and improve the super-resolution capability of the array. Therefore, the uniform linear array ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/146
Inventor 刘帅王军闫锋刚金铭崔文超
Owner HARBIN INST OF TECH AT WEIHAI
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