Single base station array positioning method and device based on multi-carrier frequency

Abstract

The invention discloses a single base station array positioning method and device based on multi-carrier frequency. The method comprises the following steps of: deploying user equipment and a base station, wherein the base station adopts an antenna array, sends and receives signals on a plurality of frequency points in an allowable communication frequency band, and controls each array element to receive the signals in turn through a switch switching mode; after preprocessing, combining one-dimensional time domain signals of multiple frequency points and multiple antennas into signals with timedomain, frequency domain and space domain three-dimensional characteristics, establishing an objective function according to a combined signal model, optimizing and solving by using a likelihood method and a learning method, and weighting to obtain position parameters such as angles and distances; and performing fusion filtering by combining historical position information and the current position parameters to obtain a final positioning result. Through adoption of the method, the cost can be lowered, and the positioning accuracy and positioning efficiency are increased.

Description

technical field [0001] The present invention relates to the technical field of position positioning, in particular to a single base station array positioning method and device based on multiple carrier frequencies. Background technique [0002] With the emergence and popularization of GNSS (Global Navigation Satellite System), outdoor positioning technology has basically matured, but indoor positioning technology still has many problems to be solved, such as complex indoor environment, multipath, non-visual There are always situations such as distance, signal fading, and interference in the same frequency band. The signal contains a lot of noise, and it is difficult to correctly calculate the position information. [0003] Multi-frequency point transmission can reduce various types of interference, such as channel interference, intermodulation interference, etc., and the system can work under harsh radio wave conditions; Normal communication on the Internet; multi-frequency...

AI Technical Summary

Problems solved by technology

[0004] At present, many indoor positioning methods are based on multiple base stations, and use the local information obtained by different base stations to estimate the node position. Among them, the more base stations, the greater the amount of information, and the more accurate the positioning, but the setting cost also increases; , although single base station positioning can solve the problem of high cost of base station deployment, its positioning accuracy depends entirely on the accuracy of the angle of arrival (AOA) and distance measurement of the base station itself, which needs to be resolved

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