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Multi-base station secondary positioning method based on toughness estimation and arrival time difference

A toughness estimation and secondary positioning technology, applied in electrical components, wireless communication, etc., can solve the problem of deterioration of positioning effect, achieve the effect of suppressing the impact and overcoming the rapid deterioration of performance

Inactive Publication Date: 2013-08-28
DALIAN UNIV OF TECH
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Problems solved by technology

According to the simulation experiment results, it is found that when the signal-to-noise ratio is low, the positioning effect of this CHAN method (including three base stations and multiple base stations) will be significantly deteriorated

Method used

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  • Multi-base station secondary positioning method based on toughness estimation and arrival time difference
  • Multi-base station secondary positioning method based on toughness estimation and arrival time difference
  • Multi-base station secondary positioning method based on toughness estimation and arrival time difference

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Embodiment Construction

[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0023] 1. In figure 1 In , the system searches for the base station (BS0) currently communicating with the mobile target as the central base station.

[0024] 2. With BS0 as the center and the borders of the six surrounding base stations BS1 to BS6 as the boundary, define a positioning area. The moving target (MS) should be located in this area.

[0025] 3. Among the seven base stations, choose three base stations, there will be 35 combinations. For each combination of three base stations, a positioning result can be obtained by using the CHAN algorithm of the three base stations. Then there are 35 positioning results in 35 groups.

[0026] 4. Taking the above formula (2) as the initial value, the above formula (1) is used to iterate the 35 positioning results, usually two to three iterations, to obtain a relati...

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Abstract

The invention relates to a multi-base station secondary positioning method based on a toughness estimation and arrival time difference, belonging to the technical field of wireless positioning. The multi-base station secondary positioning method is characterized by comprising the following steps of: firstly dividing multiple base stations around a mobile table into CN3 combinations in a triplet way; then carrying out primary positioning on the mobile table by adopting a three-base station CHAN algorithm and utilizing the TDOA information of three base stations of each combination so as to generate CN3 positioning results; then carrying out the toughness estimation on the CN3 positioning results so as to obtain a coarse positioning result; and finally carrying out secondary accurate positioning on an object to be positioned by utilizing the TDOA information of three base stations which are in nearest distance with the coarse positioning result. The multi-base station secondary positioning method can not only utilize the TDOA information of the multiple base stations, but also restrain the influence of TDOA values with larger errors on the positioning results, and can also effectively solve the problem that property is fast deteriorated when TDOA estimation errors are larger due to signal attenuation in the traditional CHAN algorithm when the environmental noise is heavier.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and relates to a multi-base station secondary positioning method based on toughness estimation and time difference of arrival. Background technique [0002] At present, the existing multi-base station positioning technologies include angle of arrival (AOA, angle of arrival), time of arrival (TOA), time difference of arrival (TDOA), phase of arrival (POA), phase difference of arrival (PDOA), and frequency difference of arrival (FDOA). And the hybrid positioning algorithm of the above several technologies. Among them, TDOA is the positioning technology with the most development potential at present. It has been successfully applied in IS-95CDMA and GSM systems. [0003] The TDOA positioning method is to solve an overdetermined equation system about the position coordinates of the mobile station. Due to interference and measurement errors in the wireless positioning problem, the coor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00
Inventor 赵泰洋郭成安
Owner DALIAN UNIV OF TECH
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