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Multihop Relaying Over IM/DD FSO Systems With Pointing Errors

Emna Zedini, Mohamed-Slim Alouini
2015 Journal of Lightwave Technology  
In this paper, the end-to-end performance of a multihop free-space optical system with amplify-and-forward channelstate-information-assisted or fixed-gain relays using intensity modulation with direct  ...  detection technique over Gamma-Gamma turbulence fading with pointing error impairments is studied.  ...  Outage probability for a multihop FSO system using CSI-assisted relays with IM/DD under weak (α = 2.902 and β = 2.51) turbulent conditions with strong pointing error (ξ = 1.1).  ... 
doi:10.1109/jlt.2015.2492244 fatcat:gjaacicyvzc3bd6pkiu5oabluq

On the Performance of Multihop Heterodyne FSO Systems With Pointing Errors

Emna Zedini, Mohamed-Slim Alouini
2015 IEEE Photonics Journal  
This paper reports the end-to-end performance analysis of a multihop freespace optical system with amplify-and-forward (AF) channel-state-information (CSI)assisted or fixed-gain relays using heterodyne  ...  detection over Gamma-Gamma turbulence fading with pointing error impairments.  ...  The performance of the FSO multihop system using CSI-assisted and fixed-gain relays over Gamma-Gamma turbulence under heterodyne detection technique with pointing errors has been reported in [7] .  ... 
doi:10.1109/jphot.2015.2417867 fatcat:ngoor6u2qvb5nbrqtigzffbyaq

Performance analysis of multihop heterodyne free-space optical communication over general Malaga turbulence channels with pointing error

Wael G. Alheadary, Ki-Hong Park, Mohamad-Slim Alouini
2017 Optik (Stuttgart)  
Alheadary, Ki-Hong Park, Mohamad-Slim Alouini, Performance analysis of multihop heterodyne free-space optical communication over general Malaga turbulence channels with pointing error, Optik -International  ...  Keywords: Free-space optical (FSO), multihop relaying, atmospheric turbulence, CSI-assisted relaying, Malaga channel, bit error rate (BER), adaptive transmission, achievable spectral efficiency (SE)  ...  using CSI-assisted relays over the general Malaga turbulence channels with pointing errors.  ... 
doi:10.1016/j.ijleo.2017.08.087 fatcat:txo5pgrwbvcmldwmqmx3z2s2d4

Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

Noor Ahmad Sarker, A. S. M. Badrudduza, S.M. Riazul Islam, Sheikh Habibul Islam, Imran Shafique Ansari, Milton Kumar Kundu, Mst. Fateha Samad, Md. Biplob Hossain, Heejung Yu
2020 IEEE Access  
The EC was analyzed in [9] for a FSO link with nonzero boresight pointing errors with IM/DD and heterodyne detection (HD) techniques.  ...  Another multihop system with low altitude aerial platform (LAP) relaying technique was designed in [17] for outage analysis.  ...  Her research interests include drug deliver system, digital microfluidics, biosensor, lab-on-a-chip, wireless endoscopy, implantable antenna, deep brain stimulation, wireless communication etc.  ... 
doi:10.1109/access.2020.3009026 fatcat:ogr44ye6ynh3bk6htmoflk35ki

Performance of UAV assisted Multiuser Terrestrial-Satellite Communication System over Mixed FSO/RF Channels [article]

Praveen Kumar Singya, Mohamed-Slim Alouini
2021 arXiv   pre-print
In this work, performance of a multi-antenna multiuser unmanned aerial vehicle (UAV) assisted terrestrial-satellite communication system over mixed free space optics (FSO)/ radio frequency (RF) channels  ...  Downlink transmission from the satellite to the UAV is completed through FSO link which follows Gamma-Gamma distribution with pointing error impairments.  ...  Gamma-Gamma distribution with pointing error impairments was considered for the FSO channel modeling and both the IM/DD and heterodyne detection techniques were studied.  ... 
arXiv:2109.05762v1 fatcat:wpoacbh6j5ao7hn5wtpdamuv6q

Performance analysis of FSO using relays and spatial diversity under log-normal fading channel [article]

Pranav Kumar Jha, Nitin Kachare, K Kalyani, D. Sriram Kumar
2018 arXiv   pre-print
The performance analysis of free space optical communication (FSO) system using relays and spatial diversity at the source is studied in this paper.  ...  A significant performance enhancement in terms of BER analysis and SNR gains is shown for multi-hop MISO and multi-hop SISO FSO systems with M-QAM over other existing systems with different modulation  ...  estimation [11] , out of which relay assisted technique appears to be prominent as several short links are used instead of a long communication link for efficient data transmission over FSO channels.  ... 
arXiv:1710.00484v4 fatcat:nf3zygdhxbbrva5plfvd24or7q

Relay Selection in Relay-Assisted Free Space Optical Systems

N. D. Chatzidiamantis, D. S. Michalopoulos, E. E. Kriezis, G. K. Karagiannidis, R. Schober
2011 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011  
As an alternative to all-active FSO relaying, where all the available relays transmit jointly, we propose a scheme which selects only a single relay to participate in the communication between the source  ...  and the destination in each transmission slot, based on the channel state information (CSI) obtained from all FSO links.  ...  In particular, we consider an intensity-modulation direct detection (IM/DD) FSO system without LOS between the source, S, and the destination, D, and the communication between these two terminals is achieved  ... 
doi:10.1109/glocom.2011.6134064 dblp:conf/globecom/ChatzidiamantisMKKS11 fatcat:geeqb3f7gfgyfmwyhi6lntw4ca

Secrecy Performance Analysis of Mixed α–μ and Exponentiated Weibull RF-FSO Cooperative Relaying System

Nazmul Hassan Juel, A. S. M. Badrudduza, S. M. Riazul Islam, Sheikh Habibul Islam, Milton kumar Kundu, Imran Shafique Ansari, Md Munjure Mowla, Kyung-Sup Kwak
2021 IEEE Access  
HD and IM/DD) and pointing errors.  ...  The impact of imperfect CSI and different relaying schemes was analyzed over the RF-FSO system with Málaga fading at the FSO link in [33] , [34] .  ... 
doi:10.1109/access.2021.3078610 fatcat:rwqtuiczrbel3iuvocqqlhlizq

Protocols for Relay-Assisted Free-Space Optical Systems [article]

Nestor D. Chatzidiamantis, Diomidis S. Michalopoulos, Emmanouil E. Kriezis, George K. Karagiannidis, Robert Schober
2011 arXiv   pre-print
We investigate transmission protocols for relay-assisted free-space optical (FSO) systems, when multiple parallel relays are employed and there is no direct link between the source and the destination.  ...  As alternatives to all-active FSO relaying, where all the available relays transmit concurrently, we propose schemes that select only a single relay to participate in the communication between the source  ...  In particular, we consider an intensity-modulation direct detection (IM/DD) FSO system without LOS between the source, S, and the destination, D, and the communication between these two terminals is achieved  ... 
arXiv:1105.3835v1 fatcat:u57o3sepurcgjjayf2p4dpow6q

Relay Selection Protocols for Relay-Assisted Free-Space Optical Systems

Nestor D. Chatzidiamantis, Diomidis S. Michalopoulos, Emmanouil E. Kriezis, George K. Karagiannidis, Robert Schober
2012 Journal of Optical Communications and Networking  
As alternatives to all-active FSO relaying, where all the available relays transmit concurrently, we propose schemes that select only a single relay to participate in the communication between the source  ...  We investigate transmission protocols for relayassisted free-space optical (FSO) systems, when multiple parallel relays are employed and there is no direct link between the source and the destination.  ...  In particular, we consider an intensity modulation direct detection (IM/DD) FSO system without LOS between the source, S, and the destination, D, and the communication between these two terminals is achieved  ... 
doi:10.1364/jocn.5.000092 fatcat:4ltafq3i5jgczjcbzugpac4bvu

Performance of Dual-Hop Relaying for OWC System Over Foggy Channel with Pointing Errors and Atmospheric Turbulence [article]

Ziyaur Rahman, Tejas Nimish Shah, S. M. Zafaruddin, V. K. Chaubey
2021 arXiv   pre-print
Optical wireless communication (OWC) over atmospheric turbulence and pointing errors is a well-studied topic.  ...  We demonstrate the mutual effects of channel impairments and pointing errors on the OWC performance, and show that the relaying system provides significant performance improvement compared with the direct  ...  SYSTEM MODEL We consider an OWC system using intensity modulation/direct detection (IM/DD).  ... 
arXiv:2105.14256v1 fatcat:cl3heuq3bnckbkdyxfc526mfty

Free Space Optics for Next Generation Cellular Backhaul

Emna Zedini
2016
However, the widespread deployment of FSO links is hampered by the atmospheric turbulence-induced fading, weather conditions, and pointing errors.  ...  Moreover, performance analysis of asymmetric RF/FSO dual-hop systems is studied. In such system models, multiple RF users can be multiplexed and sent over the FSO link.  ...  using CSI-assisted relays with IM/DD under weak (α = 2.902 and β = 2.51) turbulent conditions with strong pointing error (ξ = 1.1). . . . . . . . . . . . . 160 7.3 Outage probability for a multihop FSO  ... 
doi:10.25781/kaust-4nl6h fatcat:shah34au3bfdlps45hzaxdzby4

Impact of repeaters on the performance of indoor visible light communications

Refik Çağlar KIZILIRMAK
2015 Turkish Journal of Electrical Engineering and Computer Sciences  
We present the wireless optical channel model for VLC with the repeater and we evaluate the bit-error-rate (BER) performance for pulse-position modulation over the multipath channel with additive white  ...  In this study, we examine the performance of fixed gain amplify-and-forward repeaters for visible light communication (VLC) systems.  ...  FSO communication links experience multipath and fading effects over long distances.  ... 
doi:10.3906/elk-1212-22 fatcat:zg54owvi7na7rkem7nzro4uiti

Wireless Myths, Realities, and Futures: From 3G/4G to Optical and Quantum Wireless

L. Hanzo, H. Haas, S. Imre, D. O'Brien, M. Rupp, L. Gyongyosi
2012 Proceedings of the IEEE  
Quantum-assisted wireless communications exploits the extra computing power offered by quantum mechanics based architectures.  ...  In wireless systems there is always a trade-off between reducing the transmit power and mitigating the resultant signal-degradation imposed by the transmit-power reduction with the aid of sophisticated  ...  They would also like to thank the current and past members of the optical wireless communications groups at Oxford University, Oxford, U.K., and The University of Edinburgh, Edinburgh, U.K., for their  ... 
doi:10.1109/jproc.2012.2189788 fatcat:ieo4t2fwarcrjbxzfj3u7ejty4