Self-adaptive dynamic fingerprint library construction method of LED visible light indoor positioning system

Abstract

The embodiment of the invention provides a self-adaptive dynamic fingerprint library construction method of an LED visible light indoor positioning system and relates to the field of LED visible light indoor positioning technologies, wherein the self-adaptive dynamic fingerprint library construction method can effectively improve the positioning speed and positioning accuracy during user online positioning experience. The method includes the steps that a plurality of sampling points at certain intervals are selected with a sampling point seriously affecting light information crossing of multiple LED lamps as the center and are placed in an original sampling point set for sampling point expansion, a final sampling point set is generated, ID serial numbers of all LED light sources capable of being received by each sampling point in the ultimate sampling point set and ultimate signal strengths corresponding to the ID serial numbers are determined through calculation, the ID serial numbers and the ultimate signal strengths are standardized according to the vector format like ((ID1, RSS1), (ID2, RSS2)... (IDn, RSSn)) and are stored in a fingerprint library, and the fingerprint library is constructed.

Description

technical field [0001] The invention relates to the technical field of LED visible light indoor positioning, in particular to an adaptive dynamic fingerprint database construction method of an LED visible light indoor positioning system. Background technique [0002] With the continuous development of economy and modern technology, people's demand for navigation and positioning services is increasing, especially in complex indoor environments, it is often necessary to determine the indoor location information of mobile terminals or their holders. Existing indoor positioning mainly adopts WLAN, Bluetooth and other technologies. Products based on these technologies from companies such as Wifislam and Apple have been initially put into use. Indoor positioning technology based on VLC (Visible Light Communication) technology is due to the unique communication potential and high security of VLC technology. Sexuality is becoming the research focus of major companies and research in...

AI Technical Summary

Problems solved by technology

Since the positioning system uses multiple LED light arrays for information transmission, the fingerprint information is more sensitive to position changes in places where multiple LED light information can be transmitted, so the sampling method with equal spacing will bring large errors

In addition, in theory, when the amount of fingerprint information stored in the fingerprint database is more, we can find fingerprints with a higher degree of matching with the current user location, but the number of samples in the early stage of database construction is limited, which will affect the positioning Accuracy makes a difference

Images