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A cellular positioning system, method and device

A technology of cellular positioning and location information, applied in the direction of selection device, diversity/multi-antenna system, space transmit diversity, etc., can solve the problems of low positioning accuracy, low TDOA estimation accuracy, limited number of devices, etc., to increase the number of devices. The effect of high quantity, high accuracy and excellent network communication channel characteristics

Inactive Publication Date: 2007-08-01
HUAWEI TECH CO LTD
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Problems solved by technology

The equipment participating in the positioning in the existing positioning method only includes the target mobile station to be positioned and multiple cellular base stations communicating with it, which greatly limits the number of devices participating in an independent positioning. At the same time, due to the limitation of the bandwidth of the cellular network itself, the The accuracy of the TDOA estimate obtained by signal transmission is not high, and these two factors lead to the low accuracy of the final positioning

Method used

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  • A cellular positioning system, method and device
  • A cellular positioning system, method and device
  • A cellular positioning system, method and device

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] Fig. 1 is a composition diagram of an embodiment of the cellular positioning system of the present invention; the cellular system of this embodiment includes a target mobile station 10, at least two reference mobile stations 20, at least two base stations 30 and a location server 40, wherein:

[0054] The target mobile station 10 is used for measuring the time-of-arrival difference of the positioning test signals interacted with the at least two base stations 30 and for measuring the time-of-arrival of the positioning test signals interacted with the at least two reference mobile stations 20 difference. In a specific implementation, the manner in which the target mobile station 10 interacts with the at least two base stations 30 to locate test signals may b...

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Abstract

The disclosed honeycomb positioning method comprises: A. the target mobile station builds communication with at least two reference mobile stations, and also builds communication with at least two base stations, as well as the reference stations; B. the said target station, its reference stations, and its base stations test signal with each other; C. obtaining the achieving time difference of former test signal; and D. according to obtained time difference, computing the position message for target station. This invention reduces positioning error lower limit radically, and improves positioning precision.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a cellular positioning system, method and device. Background technique [0002] In a cellular positioning system, it is a common way to locate a mobile station by using time-differential-of-arrival (TDOA, time-differential-of-arrival) estimates between the mobile station and multiple base stations. How to improve the positioning accuracy is a problem that people have been exploring. Since the positioning method based on TDOA estimation needs to solve a set of nonlinear equations established based on TDOA estimation, most researchers start to reduce the lower limit of calculation accuracy from the algorithm of solving nonlinear equations. Foy proposed an optimization algorithm, which firstly linearized the nonlinear equation system, and then minimized the error gradually through the least square (LS, Least-Square) algorithm; Friedlander proposed the method of applying spherical...

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/34H04B7/04H04W64/00
Inventor 李美
Owner HUAWEI TECH CO LTD
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