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Method for locating mobile users of single base station on basis of multi-parameter estimation

A technology for mobile users and positioning methods, applied in the field of wireless positioning and mobile communication, which can solve problems such as inability to accurately locate and limited number of multiple base stations

Inactive Publication Date: 2017-05-10
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the problem that the number of multiple base stations is limited and the precise positioning cannot be performed, the present invention proposes a single base station mobile user positioning method based on multi-parameter estimation

Method used

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  • Method for locating mobile users of single base station on basis of multi-parameter estimation
  • Method for locating mobile users of single base station on basis of multi-parameter estimation
  • Method for locating mobile users of single base station on basis of multi-parameter estimation

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Embodiment Construction

[0008] The single base station mobile user positioning method based on multi-parameter estimation of the present invention comprises the following steps:

[0009] 1. Use the time of arrival (TOA) to distinguish the diameter arrival signal, and the signal with the shortest required time is the diameter arrival signal.

[0010] 2. Use the angle of arrival (AOA) to estimate the angle of arrival of the diameter arrival signal to obtain the orientation of the mobile user relative to the base station. Estimate the covariance matrix according to the data received by each array element in the antenna array, decompose the eigenvalue of the covariance matrix, obtain the eigenvalue and eigenvector, and find the array direction vector orthogonal to the eigenvector of the covariance matrix, thus determining the movement The orientation of the user relative to the base station.

[0011] 3. Using TOA, measure and calculate the distance between a single base station and a mobile user accordi...

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Abstract

The invention discloses a method for locating mobile users of a single base station on the basis of multi-parameter estimation. The method includes distinguishing diameter arriving signals by the aid of time of arrival (TOA), and measuring angles of arrival of diameter signals by the aid of technologies for estimating the angles of arrivals (AOA) so as to acquire the orientation of the mobile users relative to the base station; measuring the distances from the single base station to the mobile users by the aid of the TOA and channel state information (CSI) and carrying out weighting processing on distances measured by the aid of the TOA and distances measured by the aid of the CSI so as to obtain weighted distances; combining the measured angles of arrival and the measured weighted distances with one another and acquiring the locations of the mobile users by means of estimation. The method has the advantages that only the single base station is required, three types of measurement parameters which are the TOA, the AOA and the CSI are combined with one another, accordingly, the quantities of base stations and influence of multipath effects can be reduced, the cost can be lowered, and the locating precision can be improved.

Description

technical field [0001] The invention relates to the technical fields of mobile communication and wireless positioning. Background technique [0002] With the rapid development of wireless communication technology, people's demand for mobile user positioning is increasing day by day. Many mobile user positioning methods are based on angle of arrival (AOA), time of arrival (TOA), time difference of arrival (TDOA) and hybrid TDOA / AOA measurement parameters, but these measurement parameters in non-line-of-sight (NLOS) or multipath environment The operation effect is not good, and the required measurements must be obtained from at least three base stations, which not only increases the cost, but also cannot guarantee good positioning accuracy. Therefore, a mobile user positioning method based on a single base station emerges as the times require. [0003] Li et al. used the iterative Taylor series expansion method for mobile user localization, but this method requires an initia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
CPCH04W64/006
Inventor 桂林卿丛海波杨梦霞施云鲍菲菲束锋李骏陆锦辉
Owner NANJING UNIV OF SCI & TECH
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