Three-dimensional positioning method used in visible light communication scene based on fingerprint matching

Abstract

The invention discloses a three-dimensional positioning method used in a visible light communication scene based on fingerprint matching. The three-dimensional positioning method comprises steps that 1, transmitting nodes and fingerprint sampling points are arranged in a positioning scene, and an RSS fingerprint database is established; 2, area locking: according to visible light information received by a receiving end, searching in the RSS fingerprint database is carried out to acquire RSS fingerprint data closest to the visible light information received by the receiving end; by taking the RSS fingerprint data as a center, the searching area is locked; 3, iterative search: in the searching area, K-nearest neighbor iterative search is adopted, the nearest sampling points in vector space formed by transmission distances are searched, and a plurality of nearest fingerprint sampling points are acquired by the searching; 4: position estimation: the averaging of the three-dimensional coordinates of all of the acquired nearest fingerprint sampling points is carried out to acquire the estimation value of the three-dimensional coordinate of the actual position of the receiving end. The three-dimensional positioning method has advantages of high positioning precision and small positioning algorithm complexity.

Description

technical field [0001] The invention belongs to the field of mobile communication technology and indoor positioning, and in particular relates to a three-dimensional positioning method based on fingerprint matching and visible light transmission characteristics in a visible light communication scene. Background technique [0002] In recent years, location information services have developed rapidly, and the outdoor positioning technology based on the Global Positioning System (GPS, Global Positioning System) has been quite mature. However, because the GPS satellite signals received indoors are very weak or even unable to be received normally, indoor positioning has to abandon the mature and reliable GPS technology and seek other solutions. Most of the current indoor positioning solutions require additional positioning anchor nodes, which increases the deployment cost and popularization difficulty of the indoor positioning system; in the indoor positioning solution based on W...

AI Technical Summary

Problems solved by technology

Among them, due to the small space in the indoor environment and the short propagation distance of visible light, the propagation time is extremely short, which puts forward strict requirements on the clock accuracy and synchronization performance of the transceiver equipment, so TOA and TDOA technologies are difficult to achieve

AOA technology often requires an image sensor array, which makes the positioning cost larger

Images