Please use this identifier to cite or link to this item: https://repository.sustech.edu/handle/123456789/16666
Title: Optical Wireless Bandwidth Efficiency Enhancement Using Interval Shift Key
Authors: Mustafa , ,Amin B.
A , Mohammed Jamaledin
Elmaleeh , Mohammed A.
Osman , Ashraf A.
Keywords: Optical wireless communication, Optical OFDM, modulation, interval shift key, bandwidth efficiency, power efficiency.
Issue Date: 2016
Publisher: Sudan University of Science and Technology
Citation: Mustafa , ,Amin B. .Optical Wireless Bandwidth Efficiency Enhancement Using Interval Shift Key \ ,Amin B. Mustafa , ... {etal } .- Journal of Engineering and Computer Sciences (ECS) .- vol 17 , no3.- 2016.- article
Abstract: Optical wireless communication is an emerging technology that has generated a vast number of interesting solutions to very complicated communication challenges. For example high data rate, high capacity, unlicensed spectrum, high security and minimum interference links. The optical systems are significantly different from radio frequency channels where amplitude, frequency and carrier phase are modulated, in optical signal the intensity is modulated. Unfortunately, optical sources suffer from long rise/fall times such as in light emitting diodes. This leads to inefficient utilization of optical communication bandwidth. Consequently, the modulation bandwidth is restricted to only few megahertz’s. Additionally, optical detectors exhibit large capacitance that prohibits high data rate. Moreover, the optical transmission power is limited by factors such as human eye safety and power consumption limits. In this paper, a modulation technique named Interval Shift Key (ISK) is used to modulate subcarriers of optical orthogonal frequency-division multiplexing (OFDM). This technique improves the bandwidth utilization and power efficiencies and reduce bit error rate (BER). The MATLAB software is used in this study to simulate BER and power efficiency in an adaptive white Gaussian noise channel. The technique is validated by comparing simulated and published results where good agreement is achieved.
Description: article
URI: http://repository.sustech.edu/handle/123456789/16666
ISSN: ISSN 1605-427X
Appears in Collections:Volume 17 No. 3

Files in This Item:
File SizeFormat 
Optical Wireless Bandwidth ....pdf520.73 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.