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Broadband coherent source positioning method for electromagnetic vector sensor array

A sensor array, electromagnetic vector technology, applied in the field of signal processing, can solve the problems of reducing the accuracy of parameter estimation, reducing the aperture of the array, etc.

Inactive Publication Date: 2018-12-11
XIDIAN UNIV +1
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Problems solved by technology

Spatial smooth decoherence will reduce the array aperture and reduce the accuracy of parameter estimation

Method used

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  • Broadband coherent source positioning method for electromagnetic vector sensor array
  • Broadband coherent source positioning method for electromagnetic vector sensor array
  • Broadband coherent source positioning method for electromagnetic vector sensor array

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Embodiment Construction

[0024] 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.

[0025] figure 1 Shown is a schematic diagram of an electromagnetic vector sensor array according to an embodiment of the present invention. The electromagnetic vector sensor array of the present invention is a uniform linear array composed of N 6-component electromagnetic vector sensors uniformly distributed on the x-axis, and the distance between array elements is d x , d x ≤λ min / 2;

[0026] refer to figure 2 , the steps of the electromagnetic vector sensor array broadband coherent source positioning method of the present invention are as follows: a uniform linear array composed of N 6-component electromagnetic vector sensors receives K far-field broadband coherent signals, K is the number of inciden...

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Abstract

The invention discloses a broadband coherent source positioning method for an electromagnetic vector sensor array, and the method comprises the steps: receiving K far field, coherent and broadband electromagnetic signals through a uniform six-component electromagnetic vector sensor linear array; enabling six channels to perform the Fourier transform to obtain a plurality of broadband coherent signals, wherein the six channels at each frequency point to have the rotation invariant relation; performing the mean decoherent operation through the receiving signal data correlation matrix of the sixchannels; employing MUSIC spectrum peak for searching to obtain AOA (angle of arrival) estimated values at all frequency points, wherein the AOA estimated value of each signal is obtained through thearithmetic averaging of the AOA estimated value at all frequency points. The method enables the broadband signal to be converted into a plurality of narrow band signals through the Fourier transform,and then achieves the decoherent operation via vector rotation through the vector characteristics of an electromagnetic vector sensor, so there is no array aperture loss. The method improves the parameter estimation precision through the arithmetic averaging of the AOAs at all frequency points, and can effectively estimate the AOA of a broadband coherent source.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a broadband coherent source positioning method of an electromagnetic vector sensing array. Background technique [0002] Wideband signals have been widely used in communications, radar and sonar due to their richer information and stronger anti-interference capabilities; due to the complexity of the propagation environment, the array received signals include multi-path propagation signals and co-channel interference, etc. The existence of coherent source signals and interference from coherent sources will lead to false alarms or target positioning errors in radars. Multipath interference will affect the signal reception quality of communication terminals. Coherent signal processing has become the main content of array processing, and it is also the One of the main research tasks; how to quickly and accurately find the direction of the broadband coherent sign...

Claims

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Application Information

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IPC IPC(8): G01S5/00
CPCG01S5/00
Inventor 王兰美郭立新王桂宝廖桂生孙长征
Owner XIDIAN UNIV
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