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Positioning accuracy improvement method for mobile terminal

A mobile terminal and positioning accuracy technology, applied in electrical components, wireless communications, etc., can solve problems such as positioning performance discounts

Inactive Publication Date: 2011-11-23
BEIJING JIAOTONG UNIV
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Problems solved by technology

Therefore, in heterogeneous wireless networks, mobile terminal positioning technology can make full use of multi-source information for data fusion. Relevant research at home and abroad shows that cooperative positioning strategy can effectively improve mobile terminal positioning accuracy, but it is also affected by NLOS propagation. Big discount

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  • Positioning accuracy improvement method for mobile terminal
  • Positioning accuracy improvement method for mobile terminal
  • Positioning accuracy improvement method for mobile terminal

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the present invention, under the heterogeneous wireless network, preferably in the cellular network+Ad Hoc heterogeneous wireless network, the base station is fully combined with the measurement of the AOA (Angle of Arrival) and TOA (Time of Arrival) parameters of the mobile terminal, Combined with TOA short-distance measurement between mobile terminals in Ad Hoc network to improve the positioning accuracy of mobile terminals in cellular network. In the invention, the classic NLOS identification algorithm is used to identify whether the link between the base station and the mobile terminal is NLOS propagation, and then the NLOS error is suppressed through the accurate short-distance measurement information between the mob...

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Abstract

The invention provides a positioning accuracy improvement method for a mobile terminal. The method comprises the following steps: identifying NLOS (none line of sight) propagation of BS-MS (based station-mobile server) links by acquiring AOA / TOA (angle of arrival / time of arrival) measuring parameters of each link in a time interval; if all BS-MS links have no LOS (line of sight) transmission, acquiring a final position estimation of a target mobile terminal by using a Co-HTAP (hybrid positioning) algorithm; otherwise, judging the number of the mobile terminals having the LOS propagation links, and acquiring the final position estimation of the target mobile terminal by using a corresponding algorithm according to the number of the mobile terminals having the LOS propagation links.

Description

technical field [0001] The invention relates to the technical field of cellular network positioning, in particular to a method for improving positioning accuracy of a mobile terminal. Background technique [0002] Since the U.S. Federal Communications Commission (FCC) announced the E-911 emergency call positioning requirements, domestic and foreign scholars, scientific research institutions, and manufacturers have launched more in-depth research on mobile terminal positioning technology based on cellular networks. Accurate mobile terminal location information opens up a new way for the optimization of wireless resource management in mobile communication systems, which can realize dynamic allocation of spectrum resources, improve frequency utilization, optimize existing routing algorithms and network topology, and improve system performance , to achieve more flexible and stable network topology management. At the same time, obtaining accurate location information of the mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
Inventor 谈振辉丁根明张令文张子淇王元杰祝炜凯田沃贾媛媛
Owner BEIJING JIAOTONG UNIV
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