An algorithm to recover an LED path

Author

Dongfang Zheng ; Gang Chen ; Farrell, Jay A.

Author_Institution

Univ. of California, Riverside, Riverside, CA, USA

fYear

2014

fDate

24-27 June 2014

Firstpage

1631

Lastpage

1636

Abstract

In Visible Light Communication (VLC) each LED´s on-off status can be recovered only after its projected position in each measurement frame is determined. Finding the LED projection is not straightforward since: 1) Clutter and noise corrupt the measurements; 2) When the LED is turned off, its position cannot be extracted by evaluating the intensity value of each pixel. Herein, a new method based on the Viterbi algorithm is developed. This method recovers the LED trajectory through a sequence of scans by maximizing its posterior probability. This method is developed under the assumption that the frame rate of the array sensor is high relative to the rover motion bandwidth. The Viterbi based algorithm is compared with alternative approaches and demonstrated in an application.

Keywords

light emitting diodes; optical communication; probability; LED path recovery algorithm; LED projection; LED trajectory; VLC; Viterbi algorithm; clutter; frame rate; measurement frame; posterior probability; rover motion bandwidth; sensor array; visible light communication; Arrays; Clutter; Light emitting diodes; Noise; Position measurement; Trajectory; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 2014 European

Conference_Location

Strasbourg

Print_ISBN

978-3-9524269-1-3

Type

conf

DOI

10.1109/ECC.2014.6862337

Filename

6862337