Terminal positioning method and base station

Abstract

The invention discloses a terminal positioning method and a base station, comprising: A, establishing a historical data base storing position coordinates of more than one clustering point and an AOA, a TOA and an SNR of each clustering point; B, for each terminal to be positioned, acquiring the AOA, the TOA and the SNR of the terminal, or the AOA, the TOA, the SNR and an AGPS position coordinate; if the AGPS position coordinate is obtained, taking the obtained AGPS position coordinate as an initial position estimation of the terminal, if not, then finding a clustering point which is closest to the terminal to be positioned based on the obtained AOA, the TOA and the SNR and the AOA, the TOA and the SNR of each clustering point, and taking the found position coordinate of the clustering point as an initial estimation position of the terminal to be positioned; and calculating the approximate distance between every two random terminals to be positioned; C, obtaining the final estimation position of each terminal to be positioned by adopting sum product algorithm and iterative calculation based on the obtained approximate distance and the initial estimation position. The method provided by the invention is not affected by scene, and is capable of carrying out better positioning.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a terminal positioning method and a base station. Background technique [0002] With the development of mobile communication technologies, more and more attention has been paid to positioning services for terminals. Currently commonly used positioning methods mainly include: a positioning method based on the signal angle of arrival (AOA) and an assisted global positioning system (AGPS) positioning method. [0003] Among them, the specific implementation of the positioning method based on AOA includes: detecting the AOA of the radio wave transmitted by the terminal through the receiving antenna array of the base station, and accordingly forming a radial connection line from the base station to the terminal, that is, the azimuth line, using multiple base stations to detect The AOA of multiple bearing lines can be obtained, and the intersection point of these multiple bearing line...

AI Technical Summary

Problems solved by technology

[0005] However, the above two methods will have certain problems in practical applications, such as: for the first method, since the base station needs to have a receiving antenna array, the accuracy is greatly affected by the channel, so in areas with dense buildings or buildings In other words, it will be difficult to complete the positioning well under the occlusion scene; for the second method, similarly, the GPS system will not work in the occlusion scene, so it will not be able to complete the positioning well.

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