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A reference base station selection method for reducing tdoa positioning error

A technology that refers to base stations and positioning errors, and is used in services based on location information, services based on specific environments, and wireless communications. Effect

Active Publication Date: 2022-08-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of how to select a reference base station in a mixed environment of LOS and NLOS, to avoid the extreme situation where the NLOS error of the reference base station causes all TDOA values ​​​​to contain NLOS errors, and to provide a reference base station for reducing TDOA positioning errors Method of choosing

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  • A reference base station selection method for reducing tdoa positioning error
  • A reference base station selection method for reducing tdoa positioning error
  • A reference base station selection method for reducing tdoa positioning error

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Embodiment 1

[0036] The present invention considers the influence of signal non-line-of-sight propagation in indoor environment, identifies the base station with smaller measurement error by accumulating residual error, avoids reference base station measurement value containing NLOS error, and reduces TDOA positioning error. The present invention proposes a reference base station selection method for reducing TDOA positioning error. In the mixed environment of LOS and NLOS, a base station with a smaller measurement error is identified as a TDOA reference base station, and the positioning error is reduced in detail below with reference to the accompanying drawings. illustrate.

[0037] The present invention proposes a method for selecting a reference base station to reduce the TDOA positioning error. Taking two-dimensional positioning of eight base stations as an example, the base stations are BSs respectively. 1 ,BS 2 ,...,BS 8 , the coordinates of the base station are known, and the dis...

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Abstract

The invention belongs to the technical field of indoor positioning, and in particular relates to a reference base station selection method for reducing TDOA positioning error. The invention solves the problem of how to select the reference base station in the mixed environment of LOS and NLOS, avoids the extreme situation that all TDOA values ​​contain NLOS error caused by the NLOS error of the reference base station, thereby ensuring the measurement accuracy of the reference base station and improving the positioning accuracy. A reference base station selection method for reducing TDOA positioning error of the present invention can identify a base station with a smaller measurement error, and using this base station as a reference base station can reduce TDOA positioning error.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and in particular relates to a reference base station selection method for reducing TDOA positioning error. Background technique [0002] With the advancement of communication technology and positioning technology, location-based services have gradually penetrated into people's production and life and become an indispensable part. Since more than 80% of human activities are carried out indoors, indoor positioning technology has always been a research hotspot. There are many types of positioning algorithms, most of which are based on ranging. The ranging-based positioning algorithms include TOA (Time of Arrival), TDOA, AOA (Angle of Arrival), RSSI (Received SignalStrength Index), of which TOA and TDOA Because of its simplicity, accuracy and reliability, it has become the most commonly used positioning method. [0003] TDOA positioning is to determine the distance difference between th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/33H04W64/00
CPCH04W4/023H04W4/33H04W64/003
Inventor 吕宏武郝兆福王慧强郭方方冯光升李冰洋
Owner HARBIN ENG UNIV