Indoor positioning method based on 5G signal

Abstract

The invention relates to the technical field of indoor positioning, and discloses an indoor positioning method based on a 5G signal, and the method comprises the steps: obtaining a 5G signal of an indoor environment; extracting the 5G signal of the indoor environment according to a preset signal model to obtain an indoor environment characteristic signal; obtaining coarse positioning information based on a preset method according to the obtained indoor environment characteristic signal, and constructing a fingerprint map; performing accurate positioning on the fingerprint map by using an SLAM technology to obtain accurate position information; and detecting the accurate position information, if the position exists, outputting the accurate position information, and if the position is missing, outputting the coarse positioning information. According to the invention, a 5G position estimation and SLAM visual positioning combined method is adopted, the problem of position loss of the underground parking lot can be solved, the robustness of the SLAM algorithm is improved, the SLAM algorithm can be placed at a cloud end through a high-reliability 5G network, the local computing power is reduced, and network support is provided for SLAM cloudization processing.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to an indoor positioning method based on 5G signals. Background technique [0002] The Global Positioning System (GPS) is a satellite system composed of 24 satellites. This system can ensure that at any time, any point on the earth can observe four satellites at the same time, so as to ensure that the satellite can collect the latitude, longitude and altitude of the observation point, so as to realize functions such as navigation, positioning, and timing. The positioning system needs to obtain satellite signals. If the satellite signal cannot be received indoors or the satellite signal is relatively weak, the accuracy of the positioning system will become weak or even unable to perform positioning. When satellite positioning cannot be used in the indoor environment, indoor positioning technology is used as an auxiliary positioning of satellite positioning to solve the pr...

AI Technical Summary

Problems solved by technology

Common indoor positioning technologies include Wi-Fi, Bluetooth, infrared, etc., but these positioning technologies have certain defects: Wi-Fi access points usually only cover an area with a radius of about 90 meters, and are easily interfered by other signals , which affects its accuracy, and the energy consumption of the locator is also high; Bluetooth positioning is mainly used for small-scale positioning. For complex space environments, the stability of the Bluetooth positioning system is slightly poor, and it is greatly disturbed by noise signals; because light cannot pass through Obstacles, so that infrared rays can only be transmitted in line of sight, easily interfered by other lights, and the transmission distance of infrared rays is short, making the indoor positioning effect very poor

However, the underground parking lot has the disadvantages of low illumination and drastic light changes. Positioning based solely on SLAM technology has the problem of position loss, resulting in inaccurate positioning.

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