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The impact of location errors on achievable rates in OFDM-based multi-user visible light communication systems

Title	The impact of location errors on achievable rates in OFDM-based multi-user visible light communication systems
Author	Kashef, M., Abdallah, M., Qaraqe, K., Uysal, Murat
Publication Date:	2014
Publication Place	- IEEE
Subject	OFDM modulation, Light emitting diodes, Optical communication, Optical modulation, Optical receivers, Optical transmitters, Power control, Probability
Type	Document
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	978-147996676-9
Record ID	008a1677-7e24-48b7-981e-1bf658f4910c
Library Location	Electrical & Electronics Engineering
Date	2014
Notes	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text	Visible light communication (VLC) is a communication technology in which data is transferred by modulating the visible light intensity. VLC signals degrade significantly due to the absence of the line of sight (LOS) between the transmitter and the receiver. Hence, any errors in determining the location of the users and equivalently the distance between the nodes can result in performance degradation. In this paper, we investigate the impact of location errors on performance of a VLC network exploiting power control. We consider the achievable rate region of two VLC communication pairs as the performance criterion. The system employs optical orthogonal frequency division multiplexing (O-OFDM) with power control. The power control algorithm exploits the receivers locations information to determine the distances between the transmitters and the receivers, which will be used to find the optimal transmission powers. We consider the case of random errors in the location estimation process modeled with a general error probability density function. In calculating the achievable rates of the communication pairs, the optical signal clipping effect is taken into consideration that results from the physical limitations at the transmitters. The numerical results show the effects of the system parameters including the location error variance, the desired illumination power and the relative positions of the receivers relative to the light emitting diodes (LED) transmitters on the achievable rate region.
DOI	10.1109/IWOW.2014.6950778

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Özyeğin University

The impact of location errors on achievable rates in OFDM-based multi-user visible light communication systems

Author Kashef, M., Abdallah, M., Qaraqe, K., Uysal, Murat

Publication Date 2014

Publication Place - IEEE

Subject OFDM modulation, Light emitting diodes, Optical communication, Optical modulation, Optical receivers, Optical transmitters, Power control, Probability

Type Document

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 978-147996676-9

Record ID 008a1677-7e24-48b7-981e-1bf658f4910c

Library Location Electrical & Electronics Engineering

Date 2014

Notes Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Sample Text Visible light communication (VLC) is a communication technology in which data is transferred by modulating the visible light intensity. VLC signals degrade significantly due to the absence of the line of sight (LOS) between the transmitter and the receiver. Hence, any errors in determining the location of the users and equivalently the distance between the nodes can result in performance degradation. In this paper, we investigate the impact of location errors on performance of a VLC network exploiting power control. We consider the achievable rate region of two VLC communication pairs as the performance criterion. The system employs optical orthogonal frequency division multiplexing (O-OFDM) with power control. The power control algorithm exploits the receivers locations information to determine the distances between the transmitters and the receivers, which will be used to find the optimal transmission powers. We consider the case of random errors in the location estimation process modeled with a general error probability density function. In calculating the achievable rates of the communication pairs, the optical signal clipping effect is taken into consideration that results from the physical limitations at the transmitters. The numerical results show the effects of the system parameters including the location error variance, the desired illumination power and the relative positions of the receivers relative to the light emitting diodes (LED) transmitters on the achievable rate region.

DOI 10.1109/IWOW.2014.6950778