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Visible light positioning method and system based on chaotic particle swarm optimization

A technology of chaotic particle swarm and positioning method, applied in the field of visible light communication

Active Publication Date: 2017-11-17
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide a visible light positioning method based on chaotic particle swarm optimization. Perturbation solves the problem of premature convergence of the particle swarm optimization algorithm, thereby improving the positioning accuracy

Method used

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  • Visible light positioning method and system based on chaotic particle swarm optimization
  • Visible light positioning method and system based on chaotic particle swarm optimization
  • Visible light positioning method and system based on chaotic particle swarm optimization

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Embodiment

[0052] This embodiment is based on image 3 In the model shown, N LED lamps are arranged according to the needs of the indoor environment, where N is a positive integer, and N≥4; every 4 LED lamps are used as a positioning unit, and the positioning terminal is a photoelectric detection device, providing A visible light positioning method based on chaotic particle swarm optimization, the flow chart of the method is as follows figure 1 As shown, each LED light source sends its own ID information through optical signals, and the photoelectric detection device on the receiving end obtains the attenuation factor H(0) of the LED light source through the ID information; assuming that the attenuation factor corresponding to the i-th LED light source is h i (0), the coordinates of the anchor point are (x,y,z), and the coordinates of the i-th light source are (x i ,y i ,z i ), the room height is H, and the fitness function of the optimization algorithm can be determined by the follo...

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Abstract

The invention discloses a visible light positioning method and system based on chaotic particle swarm optimization. The system is composed of a transmitting terminal subsystem, a transmission subsystem and a receiving terminal subsystem. The transmitting terminal subsystem consists of a modulation module and an LED module; ID location information of an LED light source is modulated to send out the information in a visible light signal manner; the visible light signal is transmitted to the receiving terminal subsystem by the transmission subsystem; a photoelectric detection device in the receiving terminal subsystem carries out detection to obtain a light intensity attenuation factor; and the light intensity attenuation factor is inputted into a data processing module. The data processing module includes a chaotic particle swarm optimization algorithm; an early-maturing detection mechanism is introduced into the chaotic particle swarm optimization algorithm; when a particle swarm matures early, disturbance is carried out on the particle swarm based on the chaotic algorithm to generate a new particle swarm; a global optimal solution is obtained, wherein the obtained global optimal solution is a positioning point coordinate; and then a display module outputs a three-dimensional physical coordinate of the positioning point.

Description

technical field [0001] The invention relates to the technical field of visible light communication, in particular to a visible light positioning method and system based on chaotic particle swarm optimization. Background technique [0002] The Global Positioning System (GPS) is a good navigation system for outdoor applications. It has a wide range of applications in mobile phone map services, car navigation, ships and aircrafts, which largely stimulates the development of indoor positioning technology. In recent years, indoor positioning technology has received extensive attention, such as object positioning detection in large warehouses, navigation services inside large buildings, etc. However, due to multipath fading, electromagnetic shielding effect, and interference from other wireless devices, traditional outdoor positioning technology has poor signal coverage indoors, and there is a large positioning error when used for indoor positioning. Therefore, in recent years, m...

Claims

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Application Information

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IPC IPC(8): G01S5/16G06N3/00G06N7/08
CPCG06N3/006G06N7/08G01S5/16Y02B20/40
Inventor 吴玉香关伟鹏张美琦谢灿宇
Owner SOUTH CHINA UNIV OF TECH
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