High-precision visible-light positioning method based on genetic algorithm and positioning system thereof

A positioning method and genetic algorithm technology, applied in the field of genetic algorithm-based high-precision visible light positioning method and its positioning system, can solve problems such as difficult control and large positioning errors, and achieve the effect of simple and efficient methods and broad application prospects

Active Publication Date: 2017-09-15
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, RSS ranging can only solve two-dimensional positioning, and iterative or traversal algorithms are needed to achieve three-dimensional position positioning, and its positioning error is large and difficult to control

Method used

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  • High-precision visible-light positioning method based on genetic algorithm and positioning system thereof
  • High-precision visible-light positioning method based on genetic algorithm and positioning system thereof
  • High-precision visible-light positioning method based on genetic algorithm and positioning system thereof

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Embodiment 1

[0022] Such as figure 1 As shown, a genetic algorithm-based high-precision visible light positioning method and its system model. Arrange m LED lamps according to the requirements of the indoor environment, where m is a positive integer, and m≥4. The system model uses every 4 LED lamps as a positioning unit. The positioning terminal is the photoelectric detection device of the positioning receiving subsystem.

[0023] Such as figure 2 Shown, the system block diagram of the present invention. The ID position information loaded on each LED lamp generates a baseband signal through the OOK baseband modulation module, and the baseband signal is multiplied by a specific PN code at the receiving end to perform CDMA modulation to achieve spread spectrum to generate a modulated signal. The signal is converted into a visible light signal by the LED driving circuit and emitted.

[0024] Further, the visible light signal is transmitted to the photodetection device of the positioning...

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Abstract

The invention discloses a high-precision visible-light positioning method based on the genetic algorithm. The method comprises following steps of 1. Carrying out CDMA modulation on an original signal through a positioning emission subsystem; 2, positioning mixed visible light; 3, demodulating the mixed optical signals so as to acquire ID position information and light intensity attenuation factors of different LEDs; 4, expressing the luminous intensity attenuation factors of the LEDs through gains of channels; and 5, determining a three-dimensional coordinate of a receiver through the improved GA. The invention also discloses a positioning system of the high-precision visible-light positioning method based on the genetic algorithm. The positioning system comprises the positioning emission subsystem, a transmission channel and a positioning receiving subsystem which are successively connected. The positioning emission subsystem comprises an OOK base band modulation module, a CDMA spectrum spreading module, an LED driving circuit and an LED lamp which are successively connected. The method is advantaged by simplicity, high efficiency and wide application prospect.

Description

technical field [0001] The invention relates to a visible light communication indoor positioning technology, in particular to a genetic algorithm-based high-precision visible light positioning method and a positioning system thereof. Background technique [0002] GPS (Global Positioning System) is more and more widely used in vehicle navigation, map service, positioning of ships and aircrafts. But when it comes to indoor environments, radio signals from satellites will be blocked by tall buildings, resulting in large positioning errors. To meet the growing demand for indoor positioning services, Bluetooth, Wi-Fi, radio frequency identification (RFID), and camera-based positioning systems have been developed to complement GPS. However, these indoor positioning solutions have disadvantages such as complicated operation, high cost, low positioning accuracy, and poor confidentiality. [0003] The positioning system based on visible light communication (VLC) is a new solution f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16H04B10/116
CPCH04B10/116G01S5/16Y02D30/70
Inventor 吴玉香陈昊李思敏关伟鹏陈颖聪文尚胜
Owner SOUTH CHINA UNIV OF TECH
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