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A method for localization of narrow-band near-field signal sources under non-uniform noise

A technology of non-uniform noise and positioning method, applied in the direction of positioning, instruments, measuring devices, etc., can solve the problems of algorithm performance impact and estimation accuracy reduction.

Active Publication Date: 2020-03-13
XI AN JIAOTONG UNIV
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Problems solved by technology

Under this noise model, the performance of the aforementioned algorithm will be greatly affected, and the estimation accuracy will be greatly reduced

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  • A method for localization of narrow-band near-field signal sources under non-uniform noise
  • A method for localization of narrow-band near-field signal sources under non-uniform noise
  • A method for localization of narrow-band near-field signal sources under non-uniform noise

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0055] In the present invention, at first, use the main anti-diagonal elements of the array covariance matrix of the received data to eliminate the distance unknowns, and construct the Toplitz structure matrix to convert the non-uniform noise into uniform noise; then, in the constructed Toplitz structure matrix On the Leeds matrix, the classical direction of arrival estimation method is used to estimate the source direction information; finally, the second anti-diagonal element of the array covariance matrix of the received data and the estimated value of the direction of arrival are used to construct a Toeplitz structure matrix, and use a method similar to the direction of arrival to estimate the signal distance information. The narrowband near-field signal is K incoherent signals incident on the symmetrical uniform linear array The symmetrical uniform lin...

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Abstract

The present invention relates to a narrowband near field signal source positioning method under non-uniform noise. The method comprises the steps of firstly utilizing a principal back-diagonal element for receiving an estimated value of a data array covariance matrix to eliminate the distance unknown quantity, constructing a toeplitz structure matrix, and transforming the non-uniform noise into the uniform noise; then using a direction of arrival estimation method to estimate the information source direction information on the constructed toeplitz matrix; finally, utilizing a second back-diagonal element for receiving the data array covariance matrix and the estimated value in a direction of arrival to construct the toeplitz structure matrix only containing the distance unknown quantity, and using the toeplitz structure matrix to obtain the estimated value of a narrowband near field signal source distance. The narrowband near field signal source positioning method under the non-uniform noise of the present invention effectively solves the problem that the noise is non-uniform when a near field signal source is positioned, is simple to calculate, and has good estimation performances both on the direction of arrival and the distance.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a narrow-band near-field signal source positioning method under non-uniform noise. Background technique [0002] Near-field source localization technology has important applications in speaker localization systems using microphone arrays, home-aided navigation systems, radar, sonar, wireless communications, and geological exploration. Many methods have been proposed to solve the problem of localization of near-field signal sources, such as weighted linear prediction method (WLP) and near-field localization based on ESPRIT (N-GESPRIT) method. However, most of these methods are based on the uniform white noise assumption, that is, the array noise is assumed to be unknown uniform white noise or arbitrary noise with known statistical properties that can be easily transformed into uniform white noise. Obviously, in practical applications, the assumption of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/04
CPCG01S5/04
Inventor 辛景民左炜亮陈筱郑南宁
Owner XI AN JIAOTONG UNIV
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