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A localization method based on optimal joint time synchronization and localization under TOA conditions

A technology of time synchronization and positioning method, applied in the direction of positioning, synchronization device, electrical components, etc., can solve the problems of low positioning accuracy and efficiency

Active Publication Date: 2019-12-24
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and propose a positioning method for optimal joint time synchronization and positioning under TOA conditions, which is used to solve the technical problems of low positioning accuracy and efficiency in the prior art

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  • A localization method based on optimal joint time synchronization and localization under TOA conditions
  • A localization method based on optimal joint time synchronization and localization under TOA conditions
  • A localization method based on optimal joint time synchronization and localization under TOA conditions

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[0060] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0061] refer to figure 1 . The positioning method of optimal joint time synchronization and positioning under TOA conditions, comprising the following steps:

[0062] Step 1) Set system parameters:

[0063] The number of cellular base stations participating in the positioning of the mobile terminal and whose location is known is m, the number of mobile terminals is 1, and the position vector of the i-th base station is p i , the clock phase offset of each base station relative to the external reference clock is τ i , the position vector of the mobile terminal to be positioned is p, the clock phase offset of the mobile terminal relative to the external reference clock is τ, the mobile terminal sends signals to m base stations when the external clock is 0, and the i-th base station receives the signal of the mobile terminal The externa...

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Abstract

The invention provides a positioning method with optimal joint of time synchronization and positioning under a TOA condition, used for solving the technical problem of low positioning precision and efficiency of the mobile terminal positioning technology in the prior art. The positioning method with the optimal joint of the time synchronization and the positioning under the TOA condition comprisesthe following steps: setting system parameters; establishing an observation model jointing the time synchronization and the positioning time of advent TOA; establishing a constrained target functionof the positioning estimation of a mobile terminal according to the observation model jointing the time synchronization and the positioning time of advent TOA; and solving the constrained target function of the positioning estimation of the mobile terminal by means of the generalized trust region method to obtain the global optimal solution of a combined vector y and read out the global optimal solution of a position vector p of the mobile terminal. The invention avoids the transfer of the positioning error, obtains the global optimal solution of positioning non-convex problem, and improves the positioning accuracy; and the calculation efficiency of the positioning estimation is improved by a simple iterative operation. The positioning method with the optimal joint of the time synchronization and the positioning under the TOA condition can be used for the positioning estimation of the mobile terminal depending on a plurality of cellular base stations in a stadia scene.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and specifically relates to a positioning method for optimal joint time synchronization and positioning under TOA conditions, which can be used to estimate the positioning of a mobile terminal by relying on multiple cellular base stations in a line-of-sight scenario. Background technique [0002] At present, positioning technology plays a pivotal role in wireless communication, geological survey, intelligent transportation, emergency rescue, etc., and it is of practical significance to study accurate positioning methods. Positioning is divided into two categories: ranging-based positioning methods and non-ranging-based positioning methods. The positioning method based on ranging mainly uses TOA ranging method, received signal strength ranging method, time difference of arrival ranging method and angle of arrival ranging method to realize ranging. For the traditional TOA-based posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/22H04W56/00H04W64/00H04J3/06G01S5/02
CPCG01S5/0252H04J3/0682H04W16/22H04W56/001H04W64/006
Inventor 刘伟张齐齐盛敏
Owner XIDIAN UNIV
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