Indoor positioning system and method based on terminal cluster

Abstract

The invention discloses an indoor positioning system and method based on a terminal cluster, and the indoor positioning system based on the terminal cluster comprises an indoor access node Tt and a plurality of terminals Qp, p is a terminal number, t is a node number, at least four nodes T1, T2, T3 and T4 which are not located on the same plane are included, the nodes are base stations around a to-be-positioned environment, a terminal Q1 is used for representing any to-be-positioned terminal in a plurality of terminals in the area, and the terminal Q1 is a device with a read-write function; the positioning method comprises the following steps: (S100) a node sends information in a second-level precoding mode; (S200) the terminal Q1 detects the received signal from the node Tt; and (S300) three-dimensional space position estimation is carried out on the terminal Q1. According to the method, good positioning services can be provided for a plurality of terminals at the same time, the positioning efficiency of an indoor positioning system is improved, inter-cluster interference and intra-cluster interference in terminal clusters are effectively overcome, and the positioning accuracy is improved.

Description

technical field [0001] The invention relates to an indoor positioning method, in particular to an indoor positioning system and method based on terminal clusters. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for positioning is increasing. Especially in complex indoor environments, such as airport halls, supermarkets, libraries, underground parking lots, etc., it is often necessary to determine whether the mobile terminal or its Indoor location information of holders, facilities and objects. Most of the current positioning algorithms are only researched on wireless two-dimensional networks. However, in practical applications, wireless network nodes are often in a three-dimensional environment. In these cases, it is necessary to provide three-dimensional position information of mobile terminals. At present, researchers have proposed many Indoor positioning solution based on radio frequency identification. [...

AI Technical Summary

Problems solved by technology

When the base station adopts a uniform linear array structure, the downtilt angle of the beam is fixed, and the beamforming can only be performed in the horizontal two-dimensional plane; it can distinguish users with different horizontal angles, but cannot distinguish between two users with the same horizontal angle and different distances. user

[0005] Chinese patent CN201811108110.4 discloses a three-dimensional beam-based indoor multi-user positioning method, using three-dimensional beam scanning for positioning, but this method uses a uniform scanning method based on the area, without considering the environmental physical characteristics of the scanning area, and its positioning is accurate low rate

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