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Near-field signal source positioning method and system

A positioning method and signal source technology, which are applied in positioning, radio wave measurement systems, complex mathematical operations, etc., can solve the problem of high computational complexity of algorithms, algorithm estimation performance affected by the number of snapshots and signal-to-noise ratio, and poor algorithm estimation performance. And other issues

Pending Publication Date: 2022-01-21
XI AN JIAOTONG UNIV
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Problems solved by technology

However, there are still some defects and deficiencies in these existing algorithms: the computational complexity of some algorithms is high, the estimation performance of some algorithms is greatly affected by the number of snapshots and the signal-to-noise ratio, and the estimation performance of some algorithms is poor

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  • Near-field signal source positioning method and system
  • Near-field signal source positioning method and system
  • Near-field signal source positioning method and system

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[0089] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0090] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstanc...

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Abstract

The invention discloses a method and a system for positioning a near-field signal source. The method comprises the following steps of: 1, acquiring a near-field signal source array covariance matrix estimated value, and constructing a virtual far-field signal covariance matrix by using anti-diagonal elements of the near-field signal source array covariance matrix estimated value; 2, based on the virtual far-field signal covariance matrix, using a sparse reconstruction algorithm based on optimal subspace fitting to obtain an estimated value of a signal direction of arrival; 3, substituting the estimated value of the direction of arrival into a near-field source signal array covariance matrix to obtain a near-field source signal array covariance matrix; 4, obtaining an estimated value of a signal incidence distance by using a sparse reconstruction algorithm based on eigenvalue decomposition to finish positioning. The invention particularly provides a positioning method of a near-field signal source, which is effective in calculation, and can obtain good estimation performance while the complexity of the calculation amount is relatively low.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a positioning method and system for a near-field signal source. Background technique [0002] In the field of array signal processing, signal source location technology is one of the important research contents, and it plays many roles in communication, radar, communication and other fields. [0003] Most of the existing source location technologies are dedicated to far-field signal source location. However, with the continuous improvement of technical requirements in the field of sound source location and underwater radar, the near-field signal source location technology is constantly developing. Joint estimation of two parameters. Scholars at home and abroad have proposed many related algorithms, such as the estimation algorithm based on maximum likelihood, the generalized two-dimensional MUSIC algorithm, and the estimation algorithm based on high-o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/00G06F17/16
CPCG01S5/00G06F17/16
Inventor 左炜亮童应楠辛景民郑南宁
Owner XI AN JIAOTONG UNIV
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