DocumentCode :
8788
Title :
Position Accuracy of Time-of-Arrival Based Ranging Using Visible Light With Application in Indoor Localization Systems
Author :
Wang, T.Q. ; Sekercioglu, Y. Ahmet ; Neild, Adrian ; Armstrong, Jean
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Melbourne, VIC, Australia
Volume :
31
Issue :
20
fYear :
2013
fDate :
Oct.15, 2013
Firstpage :
3302
Lastpage :
3308
Abstract :
This paper analyzes an indoor positioning system that uses white lighting LEDs. Modulated signals transmitted by the LEDs are used as the basis of time-of-arrival-based distance estimation. The theoretical limits on the accuracy of estimation are calculated by deriving the Cramer-Rao bound for intensity modulated windowed sinusoidal signals. Calculations for a typical indoor scenario, assuming perfect synchronization between transmitter and receiver, but using realistic values for other parameters show that very accurate distance estimates are achievable, with typical errors being in the order of centimeters depending on the frequency and power of the sinusoidal signals, the distance from the LED and the properties of the LED and the photoreceiver.
Keywords :
estimation theory; indoor radio; intensity modulation; optical receivers; radio transmitters; time-of-arrival estimation; Cramer-Rao bound; indoor localization systems; indoor positioning system; intensity modulation; modulated signals; perfect synchronization; photoreceiver; position accuracy; time-of-arrival based ranging; time-of-arrival-based distance estimation; transmitter; visible light; white lighting LED; windowed sinusoidal signals; Bandwidth; Distance measurement; Light emitting diodes; Optical filters; Optical receivers; Optical transmitters; Cramer–Rao bound; indoor localization; intensity modulation and direct detection; ranging; time-of-arrival; visible light communication; windowed sinusoid;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2013.2281592
Filename :
6600748
Link To Document :
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