Visible light communication indoor three-dimensional positioning method and system based on ant colony optimization

A technology of visible light communication and ant colony algorithm, applied in the field of indoor positioning of visible light communication, can solve the problems of less research on three-dimensional positioning systems, achieve the effect of improving the quality of indoor optical communication, high-precision positioning, and realizing positioning

Pending Publication Date: 2018-03-09
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional VLC positioning system only realizes two-dimensional plane positioning, and there are few studies on three-dimensional positioning systems at home and abroad, and there are corresponding technical gaps

Method used

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  • Visible light communication indoor three-dimensional positioning method and system based on ant colony optimization
  • Visible light communication indoor three-dimensional positioning method and system based on ant colony optimization
  • Visible light communication indoor three-dimensional positioning method and system based on ant colony optimization

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Embodiment 1

[0056] Such as figure 1 As shown, based on the ant colony algorithm for indoor 3D positioning of visible light communication, m LEDs are arranged on the ceiling according to the needs of positioning services and the environmental conditions of the 3D space, where m is a positive integer greater than or equal to 4. In the system of this example, 4 LEDs are used as a positioning unit. The positioning terminal is the photoelectric conversion element in the receiving system.

[0057] Such as figure 2 Shown, the system block diagram of the present invention. The ID information symbol passes through the OOK baseband modulation module and the CDMA spread spectrum module. After being spread by the Walsh code, the electrical signal is converted into a visible light signal through the LED drive circuit and emitted.

[0058] The visible light signal is transmitted to the receiving system through the transmission channel. The receiving system uses photoelectric conversion elements to...

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Abstract

The invention discloses a visible light communication indoor three-dimensional positioning method and system based on ant colony optimization (ACO). The method comprises the following steps: CDMA spread spectrum modulation is carried out on original ID information codes of transmitting end LEDs; the transmitting end LEDs transmit signals loaded with the ID information codes after the CDMA spread spectrum modulation; a receiving end receives optical signals from a plurality of transmitters, wherein the obtained optical signals are hybrid optical signals; despreading is carried out on the hybridoptical signals, thereby obtaining light intensity attenuation factors and ID position information of corresponding LEDs; the light intensity attenuation factors of the LEDs are expressed through utilization of gains of channels; and three-dimensional coordinates of a receiver are determined through adoption of a three-dimensional positioning algorithm based on the ACO according to light intensity attenuation factors of the LEDs. According to the method and the system, through introduction of a CDMA modulation technology, the defect that frequency division multiple access and time division multiple access visible light communication systems in the prior art are low in channel capacity is compensated, and the indoor light communication quality is improved. According to the method and the system, a relatively high convergence rate is achieved, an algorithm error is controllable, and the system efficiency and precision are improved.

Description

technical field [0001] Regarding the indoor positioning technology of visible light communication, the present invention uses an indoor three-dimensional positioning method based on ant colony algorithm (ACO) by measuring received LED signal strength (RSS). Background technique [0002] GPS (Global Positioning System) has been widely used in many industries such as transportation and surveying and mapping. It is more and more widely used in positioning fields such as motion navigation, track recording, geodetic survey, and surrounding information query. But when it comes to indoor positioning, due to the surface skin effect of metal materials, the signal will be attenuated and absorbed on the surface of reinforced concrete, and the radio signal from the satellite will be blocked by tall buildings, which will easily lead to large positioning errors. Infrared positioning, wireless local area network (WLAN), radio frequency identification (RFID), Bluetooth, ZigBee, ultra-wideb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04W4/33H04W4/021G01S5/16
CPCH04B10/116G01S5/16
Inventor 文尚胜吴兴邦
Owner SOUTH CHINA UNIV OF TECH
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