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Partly-corrected symmetrical uniform linear array based narrow-band near-field signal source positioning method

A technology of uniform linear array and positioning method, applied in positioning, radio wave measurement system, measurement device, etc., can solve the problem of large amount of calculation of FR-RARE algorithm

Active Publication Date: 2014-09-10
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] However, the positioning performance of the N-GESPRIT algorithm needs to be improved, and the FR-RARE algorithm has a large amount of calculation. Therefore, it is urgent to propose a near-field source positioning method with excellent positioning performance and simple calculation.

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  • Partly-corrected symmetrical uniform linear array based narrow-band near-field signal source positioning method
  • Partly-corrected symmetrical uniform linear array based narrow-band near-field signal source positioning method
  • Partly-corrected symmetrical uniform linear array based narrow-band near-field signal source positioning method

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. In the following, for any variable a, Indicates the estimated value of the variable a.

[0041] The present invention provides a method for positioning a narrow-band near-field signal source based on a partially corrected symmetrical uniform linear array. The specific implementation steps are summarized as follows:

[0042] see image 3 In the scenario shown, K incoherent narrowband near-field signals It is incident on a partially corrected symmetrical uniform line array, which contains 2M+1 omnidirectional sensor array elements, and 2M in the central area c +1(-M c ,...,M c ) sensors have been corrected, the rest are not corrected, M, M c are positive integers, and the value range of M is M≥K, and M c θ k Indicates the counterclockwise angle (direction of arrival) of the kth incident signal relative to the y-axis, r k is the distance of the...

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Abstract

The invention discloses a partly-corrected symmetrical uniform linear array based narrow-band near-field signal source positioning method. The method includes: dividing an array into two overlapped and symmetrical subarrays, supposing that phase and amplitude gain of part of sensors of the array are given, and utilizing a spatial rotary invariant technology to estimate to obtain a direction-of-arrival angle of a near-field signal prior to utilizing the estimated direction-of-arrival angle and a multiple-subspace signal classification technology to solve distance information of the near-field signal. Calculated amount is lowered and estimated performance is improved from two aspects including firstly, a low-dimension cost function is constructed when the direction-of-arrival angle is estimated and secondly, a two-dimensional estimation problem is transformed into two one-dimensional estimation problems when the near-field direction-of-arrival angle and the distance are estimated.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a positioning method of a narrow-band near-field signal source based on a partially corrected symmetrical uniform linear array. Background technique [0002] Passive positioning technology has important applications in speaker positioning 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 near-field signal source localization, such as weighted linear prediction method (WLP) and estimation method of higher order statistics (HOS). However, these methods fail when the array is partially rectified; in addition, methods based on higher-order statistics require high computational complexity. The near-field source localization technique (N-GESPRIT) based on the generalized space rotation invariant technique, on the one hand,...

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Application Information

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IPC IPC(8): G01S5/04
CPCG01S5/00
Inventor 左炜亮辛景民王光敏郑南宁
Owner XI AN JIAOTONG UNIV
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