FSO-FREE SPACE OPTICAL IEEE PAPER
Design and performance of hybrid FSO/RF architecture for next generation broadband access networks
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Abstract This paper proposes a novel Ethernet-based wired/wireless broadband access networking architecture that utilizes the existing wired trunk feeder fiber of typical PON infrastructure along with a hybrid FSO/RF reliable wireless connectivity to the end-users.
PDF estimation and liquid water content based attenuation modeling for fog in terrestrial FSOlinks
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Abstract. Terrestrial Free-space optical communication (FSO) links have yet to achieve a mass market success due to the ever elusive 99.999% availability requirement. The terrestrial FSO links are heavily affected by atmospheric fog. To design systems which can
The effects of weather on the life time of wireless sensor networks using FSO/RF communication
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Abstract. The increased interest in long lasting wireless sensor networks motivates to use Free Space Optics (FSO) link along with radio frequency (RF) link for communication. Earlier results show that RF/FSO wireless sensor networks have life time twice as long as RF only
The last-mile solution: hybrid FSO radio
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DSL and cable modems can, to some extent, take advantage of existing wired networks; however, they cannot provide true broadband services in a deter- ministic way. DSL technology is plagued by the actual topology of the copper to which it is attached, and is limited in
Modeling of atmospheric turbulence effect on terrestrial FSO link
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Abstract. Atmospheric turbulence results in many effects causing fluctuation in the received optical power. Terrestrial laser beam communication is affected above all by scintillations. The paper deals with modeling the influence of scintillation on link performance, using the
BER and availability measured on FSO link
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Abstract. The BER and the availability belong among the basic qualitative parameters of free space optical (FSO) links. The BER parameter is usually mentioned by FSO manufacturers, but it is not defined what conditions a certain value of BER stands for. This article deals
Direct Determination of the Limiting High-pressure Rate Constants of the System FSOB 4-FSO, F2S20, over the Temperature Range 293-381 K
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The recombination of radicals and the reverse simple bond dissociation reactions are fairly well-understood processes. Many experimental data of high-pressure rate constants have been recently evaluated in terms of the canonical version of the statistical adiabatic
Efficient lognormal channel model for turbulent FSO communications
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A simple and computationally efficient model for free-space optical (FSO) communications is presented, valid for an unbounded plane wave operating under weak irradiance fluctuation conditions. Obtained results corroborate very good agreement with theoretical
Modeling of 830 nm FSO link attenuation in fog or wind turbulence
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Abstract. This study is focused on the experimental research of the atmosphere impact on FSO link attenuation. Experiment is performed on a mountain observatory Milesovka of severe weather conditions. The empirical relationships on 830 nm only between FSO
Performance evaluation of FSO link under NRZ-RZ line codes, different weather conditions and receiver types in the presence of pointing errors
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Abstract: Performance evaluation for a free space optical (FSO) link with latest wireless optical communications (WOC) vendor's networks specifications is presented. Analysis is performed for non return to zero (NRZ)-return to zero (RZ) line codes with various
Experimental investigation of the performance of ook-nrz and rz modulation techniques under controlled turbulence channel in fso systems
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SO communications or better still, laser communications is an age long technology that entails the transmission of information laden optical radiation as the carrier signal through the atmospheric channel. FSO communication offers an increased information capacity
PPM channel capacity evaluation for terrestrial FSO links
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Abstract:Information theoretic channel capacity provides a basic figure of merit to analyze the performance of coded modulation. This paper presents analytical results on the PPM capacity of terrestrial FSO channels, considering the important link impairments in terms of
Pointing error in FSO link under different weather conditions
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Abstract:Pointing errors is one of the main challenges that face free space optical communication and affects its performance specially at high range links, in this paper, an evaluation for the pointing error for practical Bit Error Rate is carried. This is done for an
Oxidation of Organic Compounds in Fluorosulfonic Acid. XIII. Oxidative Reaction of Aromatic Compounds in Acidic Systems Based on FSO~ 3H and CF~ 3COOH
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Abstract-Basing on the common scale of electrochemical potentials for superacids and acetonitrile, on diagnostic criteria of structural changes in depolarizers at their one-electron oxidation in superacids, and also on identification of conjugate chemical reactions data
Fine Tracking System for Aeronautical FSO Links
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Abstract Free-space optical terminals on aeronautical platforms for A/C-Ground or A/C-Sat links are likely to suffer from pointing errors induced by eg carrier vibrations. These drawbacks can be overcome with an agile Fine Pointing Assembly (FPA). Such an FPA,
Experimental development and study of Wi-Fi and FSO links
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Abstract:Wi-Fi, using 2.4 GHz microwaves and IEEE 802.11 b/g standards, is mainly applied to the development of out-door wireless links. In addition, a FSO link is implemented for data and voice communications. Link quality has been tested. Several results are
Cargo oil heating requirements for an FSO vessel conversion
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Highly viscous crude oil stored in a floating-storage-and-offloading (FSO) vessel can provoke cargo pumping and remain-on-board (ROB) problems Cargo oil heating in the vessel to reduce the viscosity and minimize the problems is studied in this paper as well
Free space optics (FSO) links in Singapore: scintillation effects
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School of ElectricalElectronic Engineering Nayang Technological University Nanyang Avenue, Singapore 639798 e-mail: H977168@ ntu. edu. sg Keywords: FSO link,
Channel capacity of MIMO FSO system under strong turbulent condition
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Abstract:Free Space Optics (FSO) or optical wireless communication is a promising solution for the need to very high data rate point-to-point communication. In FSO communication links, atmospheric turbulence causes fluctuations in both the intensity and
Topology Control using Adaptive Power Control and Beam-Width in Hybrid RF/FSO MANETs
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Abstract:In this paper we introduce a new strategy for controlling the topology in hybrid RF/FSO mobile ad hoc networks. This strategy is based on adapting and adjusting the transmission power and the beam-width of individual nodes according to Quality of
Channel estimation for FSO channels subject to Gamma-Gamma turbulence
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Abstract:The problem of estimating the signal intensity level in a turbulent optical channel when the channel is subject to Gamma-Gamma fading (GGF) is investigated. Such an estimation process is of paramount importance to a direct-detection, on-off-keying (OOK),
BER Performance of IM/DD FSO System with OOK using APD Receiver
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In this paper, the performance of intensity-modulated with direct detection (IM/DD) free space optical (FSO) system using the on-off keying (OOK) and avalanche photodiode (APD) receiver is observed. The gamma-gamma model is used to describe the effect of
Performance analysis of SISO and MIMO FSO communication systems over turbulent channels
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Free-space optical (FSO) communications using intensity modulation and direct detection (IM/DD), is a cost-effective and high bandwidth access technique, which has recently received significant attention and commercial interest for a variety of applications
Performane evaluation of the Free Space Optical (FSO) communication with the effects of the atmospheric turbulances
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ABSTRACT Free space optical (FSO) communication has emerged as a viable technology for broadband wireless applications which offers the potential of high bandwidth capacity over unlicensed optical wavelengths. Atmospheric turbulence has a significant impact on
Performance comparison of NRZ and RZ techniques over FSO-OCDMA system to transmit 10 Gbps Data
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Abstract In this Paper, a novel approach is applied to transmit high speed data (10 Gbps) over FSO link by employing OCDMA technique. Two principal coding techniques of optical fiber communication ie NRZ and RZ have been implemented. Coding and decoding
Decreasing of Turbulent Atmosphere Effect by Multi Beam Transmission in FSO
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FSO systems represent good alternative of optical fiber system for high bit rate. In case when a laying of an optical cable is inconvenient (temporary usage, adverse terrain, etc.) FSO is acceptable. FSO is a full duplex link that uses optical carrier wave in the atmospheric
Statistical analysis of fade events on FSO systems
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Abstract: The paper deals with the time-domain characteristics of fade events on Free-Space Optical (FSO) systems caused by atmospheric attenuation. Commercially available optical links operate mostly in the 850 nm and 1550 nm wavebands, where the dominating
Free space optical (FSO) link design under diverse weather conditions
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Abstract:-This paper presents the link budget calculations for Free Space Optical (FSO) communication system under diverse weather conditions. It discus ses various factors involv ed in the medium between the transmitter and receiver, which affect link budget
Software package for analyze FSO links
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System Simulator (FSO SystSim), which was designed and implemented at KEMT FEI TUKE (Department of Electronic and Multimedia Communications, Faculty of Electronics and . Simulation of FSO communication link is very
The climate effects on line of sight (LOS) in FSO communication
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Abstract. The connectivity and presence of free space optics (FSO) systems in dependence on weather conditions and on FSO link parameters with line of sight (LOS), such as transmitted optical power, beam divergence, receiver sensitivity or link path distance, is
Performance of a 10 Gbps FSO system implementing novel beam tracking and a dynamic buffering modem
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ABSTRACT A 10 Gbps FSO system implements beam tracking, a high dynamic range optical receiver, and a dynamic buffering packet modem. Performance was characterized at
Research of signal tracking technology in FSO communication
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ABSTRACT In the decade of information, with the increment of the data rate and capacity in communication, free space optical communication (FSO) has been paid much attention by many countries since it integrates the advantages of fiber communication and other
Heuristic algorithms for designing minimum cost fso networks
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Abstract:This paper presents six heuristic algorithms for designing minimum cost Free Spaces Optics (FSO) networks. The criterion used for minimizing cost is the same as minimizing the total number of links in the network or, equivalently, minimizing the number
Availability study of FSO systems in Europe
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Space Optical communication links based on data obtained by longterm measurement. Visibility records collected from 210 European airports were analyzed to obtain a realistic estimation of the availability of wireless optical technology. Commercially available optical
FSO Communication Characteristics under Fog Weather Condition
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Abstract: In this paper, the performance of an FSO wireless communications system is theoretically analyzed, using NRZ-OOK and 16-PPM modulation formats and a Si PIN photodiodes receiver over fog weather conditions. Four fog models are used for optical
Average Capacity Estimation of Hybrid FSO/MMW Wireless Communication Systems
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ABSTRACT The free space optical communication systems attract the last few years very significant research and commercial interest due to their high performance and low operational cost. The main problem of this technology is the influence of the atmospheric
Generation of a New Hybrid Subcarrier Multiplexing SAC-OCDMA System Based on FSO
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ABSTRACT This paper proposes hybrid Subcarrier Multiplying-Spectral Amplitude Coding- Optical Code Division Multiple Access system (SCM-SAC-OCDMA) based on the Free Space Optic (FSO) using Multi Diagonal (MD) code is. The proposed hybrid system is
Reliability analysis of FSO communication links using aberrated divergent rectangular partially coherent flat-topped beam
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Abstract: In the present paper, the effects of aberration on the Bit-Error-Rate (BER) and reliability of Free-Space Optical (FSO) communication links are investigated. Based on aberrated divergent rectangular partially coherent flat-topped beam formula on the
Analysis/Simulation of Unavailability of FSO Link Due to FOG in KarachiLahore
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Abstract Now a day's transmission of data using infrared light in free space through laser is keen interest of researchers as compared to traditional fiber optics and RF transmission due to its inherent advantages, such as low cost, easy to install and maintain high bandwidth
On the Reliability and Performance of FSO and Hybrid FSO Communication Systems over Turbulent Channels
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ABSTRACT In this paper, we present an overview of recent advances in investigating the influence of atmospheric turbulence in the reliability, and performance of free space optical (FSO) and hybrid FSO communications systems through the estimation of their outage
Analysis of Q-Factor at Different Wavelength in FSO Under Different Weather Conditions
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Abstract Free space optics (FSO) has the great potential for future communication. FSO link is a license free, secure and easily deployable and offers low bit error rate link. Over the last two decades free space optical communication (FSO) has becomes more and more
Bi-Directional GPON over FSO employing Triple Play Services for 128 users
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1. INTRODUCTION Next generation access networks should meet increasing demand for large bandwidth. Passive optical network involving wavelength division multiplexing(WDM-PON) is most promising access network [1].Households prefer to consume triple-play bundles, ie,
Impact of Polarization Interleaving (PI) on WDM-FSO system
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WDM Free Space Optical transmission when even and odd channels are orthogonally polarized. In this work 8 independent channels each having capacity of 1.56 Gbps are transmitted over free space optical link of 15 kilometer at different beam divergence
Dual header pulse interval modulation (DH-PIM) in FSO communications
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ABSTRACT Recently, free space optical communication has attracted a considerable amount of interest as an alternative medium to radio for wireless transmission. It has many advantages such as a huge unregulated bandwidth, high data rates, and resistance to
Analysis of FSO Communication Links for Mid And Far Infrared Wavelengths
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Abstract:Atmospheric attenuations pose biggest challenge in implementing Free Space Optical Communication (FSO) links. Studying atmospheric attenuation as function of cumulative aerosol particle size distribution gives more reliable results rather than taking
ABOUT THE USE OF FSO AND 58 GHZ MICROWAVE SYSTEMS IN THE UMTS ACCESS NETWORK
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Abstract: Microwave access networks that backhaul UMTS nodes in urban areas are already quite dense in terms of links per square km. Since 2003, H3G started some investigations on Free Space Optics (FSO) and microwave equipment operating in the 58 GHz band as
Reliability and Availability of FSO for different Weather Conditions
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Abstract:Today Free-Space Optical communication (FSO) has overcome the radio frequency communication. This paper gives an overview of the availability of an FSO system and its different weather conditions. It describes problems that the designer faces while
Hybrid FSO-RF System: A Solution to Atmospheric Turbulences in Long Haul Communication
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Abstract-During the past few decades the Free Space Optical (FSO) communication has done the tremendous job in Communication sector. These days it can act as a good alternative of Radio Frequency (RF). Key differences in the RF and FSO techniques has
Simulation of FSO transmission channel
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Abstract: The paper deals with the modeling and simulation of atmospheric Free-Space Optical (FSO) links. Due to the effect of atmospheric turbulence the links are characterized by outages in the order of tens of milliseconds, which are several orders of magnitude
Performance Analysis of Amplify-Decode-and-Forward Multihop BPSK/FSO Systems using APD Receivers over Atmospheric Turbulence Channels
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Abstract This paper studies the performance of multihop free-space optical (FSO) systems using the subcarrier binary phase-shift keying modulation (BPSK) over atmospheric turbulence channels. We propose a modified relaying strategy, termed amplify-decode-
Artificial Neural Network Utilization for FSO Link Performance Estimation
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Abstract. This paper describes FSO link performance prediction based on available meteorological data using different Artificial Neural Network (ANN) approaches. Several types of ANNs were compared and their performance was evaluated. The paper
Model of FSO Path for Network Simulation
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Abstract:The paper deals with a parameterized model for simulation of packet transmission on atmospheric Free-Space Optical (FSO) links. Due to the effect of atmospheric turbulence the channel is characterized by signal fluctuations in the order of tens of milliseconds. For
Enhancing FSO Link Performance in Adverse Conditions Using a Fiber-Bundle Based Receiver Design
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THEUNIVERSITYOFTULSA THE GRADUATE SCHOOL ENHANCING FSO LINK PERFORMANCE IN ADVERSE CONDITIONS USING AEnhancing FSO Link Performance in Adverse Conditions using a Fiber-Bundle Based Receiver Design Directed by Dr. Peter LoPresti
Level TransducerLess thanFSO Static Accuracy2.50 PTFE Coated
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Level TransducerLess than 4 ODFSO Static Accuracy2.50 PTFE Coated2.0 x FS STATIC PERFORMANCE Static Accuracy (combined effects of non-linearity, hysteresis and repeatability, best fit straight line method)FSO BFSL method Resolution
Performance Evaluation of Different Type of Channel Models in FSO Communication
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Abstract-Atmospheric turbulence-induced fading is one of the main impairments affecting free-space optics (FSO) communications. To design a high performance communication link for the atmospheric FSO channel, it is of great importance to characterize the channel with
Analysis the effect Atmosphere Turbulence in Free-Space Optical (FSO) Communication Systems
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Abstract: Over the last two decades free-space optical communication (FSO) has become more and more interesting as an adjunct or alternative to radio frequency communication. In this paper, performance of free space optical (FSO) communication in the presence of
fSO
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ABSTRACT The ammoniated citric acid formulation is not an effective descalant for the removal of moderate amounts of hard adhering depositsof the tyve that are normally present on the boiler vatersides of operating Naval ships. Increasing solution concentrations as
BER Evaluation of FSO Link for different Duty Cycles of RZ pulse in different conditions of Rainfall
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Abstract: Free-space optical communication (FSO) systems (in space and inside the atmosphere) have developed in response to a growing need for high-speed and tap-proof communication systems. FSO can carry full-duplex data at Gbps rates over metropolitan
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