Abstract:We report a novel indoor positioning scheme based on MIMO LED VLC system applying space diversity receiver. The simulation results show that the BER performance can be significantly improved by using MIMO-MRC algorithm.
IntroductionVisible light communication (VLC) is expected to provide multi-gigable bit mobile data transmission, and has been intensively studied in the reseach community [1][2]. A number of papers have described the use of LEDs for localization [3][4][5]. The performance variation at the recei… Show more
“…Regardless of the air and device refraction, we consider that radiation angle φ equals the incidence angle . The received optical power at a receiver in a direct link can be represented in Equation (1) [ 6 , 7 , 8 , 9 ]: where represents the Lambertian order; is the distance between the LED and the receiver; is the physical area of a photodiode; is the refractive index of the optical concentrator; is the incidence angle of the light with respect to the normal vector of a photodiode; is the gain of the optical filter; and is the average transmitted optical power [ 10 , 11 ]. All the constants are expressed by formula as follows: …”
Section: Methodsmentioning
confidence: 99%
“…A number of papers have described the use of LEDs for localization [ 8 ]. VLC-based IPS can be generalized into two formats: photodiode-based (PD-based) positioning and image sensor–based positioning [ 9 ].…”
Exploiting the increasingly wide use of light emitting diodes (LEDs) lighting, in this paper we propose a reversed indoor positioning system (IPS) based on LED visible light communication (VLC) in order to improve indoor positioning accuracy. Unlike other VLC positioning systems, we employ two annular receivers with multi-photodiodes installed on the ceiling to locate the persons who carry LEDs. The basic idea is using multi-photodiodes to calculate the angle while using the received signal strength (RSS) method to calculate the distance. The experiment results show that the effective positioning range of the proposed system is 1.8 m when the distance between two receivers is 1.2 m. Moreover, a positioning error less than 0.2 m can be achieved under the condition that the radius of the PIN circle is between 0.16 m and 0.2 m, and the distance of the transmitter-receiver plane is less than 1.8 m, which will be effective in practice.
“…Regardless of the air and device refraction, we consider that radiation angle φ equals the incidence angle . The received optical power at a receiver in a direct link can be represented in Equation (1) [ 6 , 7 , 8 , 9 ]: where represents the Lambertian order; is the distance between the LED and the receiver; is the physical area of a photodiode; is the refractive index of the optical concentrator; is the incidence angle of the light with respect to the normal vector of a photodiode; is the gain of the optical filter; and is the average transmitted optical power [ 10 , 11 ]. All the constants are expressed by formula as follows: …”
Section: Methodsmentioning
confidence: 99%
“…A number of papers have described the use of LEDs for localization [ 8 ]. VLC-based IPS can be generalized into two formats: photodiode-based (PD-based) positioning and image sensor–based positioning [ 9 ].…”
Exploiting the increasingly wide use of light emitting diodes (LEDs) lighting, in this paper we propose a reversed indoor positioning system (IPS) based on LED visible light communication (VLC) in order to improve indoor positioning accuracy. Unlike other VLC positioning systems, we employ two annular receivers with multi-photodiodes installed on the ceiling to locate the persons who carry LEDs. The basic idea is using multi-photodiodes to calculate the angle while using the received signal strength (RSS) method to calculate the distance. The experiment results show that the effective positioning range of the proposed system is 1.8 m when the distance between two receivers is 1.2 m. Moreover, a positioning error less than 0.2 m can be achieved under the condition that the radius of the PIN circle is between 0.16 m and 0.2 m, and the distance of the transmitter-receiver plane is less than 1.8 m, which will be effective in practice.
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