Three-dimensional positioning method based on wireless communication base station

Abstract

The invention discloses a three-dimensional locating method based on a wireless communication base station. The method comprises the following steps: 1) obtaining BS coordinates of base stations, and calculating propagation times from a mobile terminal MT to the base stations; 2) selecting a target base station from all base stations BS to serve as a BS1, and setting the other base stations as BSi; 3) calculating distance differences dbbi1 from the other base stations BSi to the target base station BS1, screening the other base stations BSi, and updating and calculating the propagation times from the mobile terminal MT to the screened other base stations BSi; and 4) operating an alpha-TDOA algorithm to obtain the coordinate (x, y, z) of the mobile terminal MT. According to the three-dimensional locating method disclosed by the invention, the relationship between a measured value and an actual value of weighted factor expression, and a design algorithm are imported for calculation and optimization. A test result indicates that the comprehensive algorithm provided by the invention is low in computational complexity, high in convergence speed and high in efficiency, and the precision of the finally calculated terminal position coordinate is high.

Description

Technical field [0001] The present invention relates to the technical field of mobile communication positioning, in particular to a three-dimensional positioning method based on a wireless communication base station. Background technique [0002] With the emergence of location-based applications, location services have become an important part of mobile value-added services and have broad application prospects in the field of mobile communications. Therefore, using base stations to provide location services has become a research and application hotspot. With the rapid development of mobile communication networks in recent years, more mobile terminals have been connected to the mobile communication network, and more and more base stations have been established, covering almost every corner of the world to provide communication services for terminal users. The precise positioning of mobile terminals has become increasingly important. [0003] The most basic positioning technology in...

AI Technical Summary

Problems solved by technology

[0004] The Cell-ID positioning method indicates the user's position according to the position of the cicada's nest connected to the mobile terminal. The accuracy of this positioning method is low, and the positioning accuracy varies greatly; The specific position of the target terminal is determined by the propagation time or propagation time difference from the mobile terminal to multiple base stations. The positioning accuracy is higher than the previous positioning method, but considering the situation of line-of-sight and non-line-of-sight, factors such as measurement and noise will cause Error; A-GPS positioning method is based on GPS positioning technology, and transmits auxiliary data through wireless communication network. It is a very fast positioning method, which has the advantages of high positioning accuracy and fast positioning speed. The problem lies in the technical difficulty and the inability to effectively solve the indoor positioning problem

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