Frequency domain equalization of optical channel distortion in free-space optical wireless communications

2006 ◽  
Author(s):  
Mohsen Kavehrad ◽  
Sangwoo Lee ◽  
Binbin Wu
Keyword(s):  
Wireless Communications ◽  
Frequency Domain ◽  
Free Space ◽  
Optical Channel ◽  
Optical Wireless ◽  
Free Space Optical ◽  
Optical Wireless Communications ◽  
Frequency Domain Equalization ◽  
Channel Distortion

Optical Wireless Communications in Vehicular Systems

2013 ◽  
pp. 209-222
Author(s):  
Matthew Higgins ◽  
Zeina Rihawi ◽  
Zaiton Abdul Mutalip ◽  
Roger Green ◽  
Mark S. Leeson
Keyword(s):  
Wireless Communications ◽  
Free Space ◽  
Optical Wireless ◽  
Engine Compartment ◽  
Free Space Optical ◽  
Optical Wireless Communications ◽  
Wireless Links ◽  
Optical Propagation ◽  
Basic Understanding ◽  
Network Topologies

This chapter reviews some of the network topologies and technologies within current vehicular systems. This is then followed by a proposal from the authors with initial viability results, into the possibility of implementing optical wireless links to either replace or complement these existing ideas. The initial motivation for this work (Green, 2010) is that there exist multiple pathways within a vehicle such as the engine compartment, within the frame of the chassis, or the internal cockpit that all lend themselves nicely to free space optical propagation. The first specialised study on the viability of optical wireless communications within the vehicles cabin was then published in (Higgins et al, 2012) which provided a further impetus to the concept. It is hoped that through the original results presented here, the reader can gain a basic understanding of the concepts compared to the current technologies, and are then able instigate their own research ideas.

scholarly journals Effect of Environmental Parameters on the Performance of Optical Wireless Communications

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Hosam Abd Elrazek Mohamed Ali ◽  
El-Sayed Soliman A. Said ◽  
Mohamed Ebrahim Yousef
Keyword(s):  
Wireless Communications ◽  
Free Space ◽  
Communication Systems ◽  
High Speed ◽  
System Analysis ◽  
Environmental Parameters ◽  
Weather Conditions ◽  
Optical Wireless ◽  
Free Space Optical ◽  
Optical Wireless Communications

Free space optical communication systems are the future of the communication systems which can meet the needs of the end users who are demanding high bandwidths to support high-speed communication. These merits are due to its numerous advantages as well as their better performance. This paper studies the effect of environmental parameters like rain, fog, haze, snow, and dust on the performance of optical wireless communications using Opti-system program. This work considers the effect of visibility as well as operating wavelengths on atmospheric attenuation in different weather conditions for free space optical link. For different weather conditions the max distance between transmitter and receiver can also be estimated. The system analysis depicted the better performance of the Multi-Input/Multi-Output (MIMO) configurations compared to Single Input/Single Output (SISO) at different weather conditions.

scholarly journals Interference in multi-user optical wireless communications systems

2020 ◽  
Vol 378 (2169) ◽  
pp. 20190190 ◽  
Author(s):  
Iman Abdalla ◽  
Michael B. Rahaim ◽  
Thomas D. C. Little
Keyword(s):  
Wireless Communications ◽  
Access Point ◽  
Data Access ◽  
Visible Light Communications ◽  
Optical Wireless ◽  
Free Space Optical ◽  
Multiple Sources ◽  
Optical Wireless Communications ◽  
Spatial Coverage ◽  
Wireless Communications Systems

Visible light communications (VLC) (including LiFi) represent a subset of the broader field of optical wireless communications. Where narrow beams, typical of free space optical communications are largely free from interference. VLC encompasses use cases involving combined illumination and data access and supporting a wireless access point (AP) model. The use of many units provides scaling of spatial coverage for both lighting and data access. However, AP replication in close proximity creates many interference challenges that motivate the investigation embodied in this paper. In particular, we frame the interference challenge in the context of existing strategies for driving improvements in link performance and consider the impacts of multiple users, multiple sources and multiple cells. Lastly, we review the state of existing research in this area and recommend areas for further study. This article is part of the theme issue ‘Optical wireless communication’.

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