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The free space optical interference channel

Saikat Guha, Ivan Savov, Mark M. Wilde
2011 2011 IEEE International Symposium on Information Theory Proceedings  
Here, we present a quantum treatment of a multiple-transmitter multiple-receiver multi-spatial-mode free-space interference channel with diffraction-limited loss and a thermal background.  ...  Joint detection outperforms both homodyne and heterodyne detection whenever the channel exhibits "very strong" interference.  ...  A FREE-SPACE OPTICAL INTERFERENCE CHANNEL Consider a range-L line-of-sight free-space optical channel with hard circular transmit and receive apertures of areas A t and A r respectively.  ... 
doi:10.1109/isit.2011.6033712 dblp:conf/isit/GuhaSW11 fatcat:pzviy5impjflvnckqonukido74

Radio Frequency Interference Management with Free-Space Optical Communication and Photonic Signal Processing [article]

Yang Qi, Ben Wu
2021 arXiv   pre-print
We design and experimentally demonstrate a radio frequency interference management system with free-space optical communication and photonic signal processing.  ...  The system provides real-time interference cancellation in 6 GHz wide bandwidth.  ...  The interference signal is split as the reference signal, modulated at the laser frequency of 1560nm, and sent through a pair of optical collimators as the optical free-space channel.  ... 
arXiv:2107.14137v1 fatcat:xu3ol5npsffvjghla42tohlwuq

Multi-channel Communication in Free-Space Optical Networks for the Last-mile

Jayasri Akella, Murat Yuksel, Shiv Kalyanaraman
2007 2007 15th IEEE Workshop on Local & Metropolitan Area Networks  
We address the multi-channel interference issue by both array design and by employing optical orthogonal codes (OOCs) for free-space optical communications and show that we can achieve multi Gbps bandwidths  ...  Free-Space Optical communication technology is a potential solution to the last mile or broadband access problem.  ...  In this paper we explore multi-channel free-space optical communication system using 2-dimensional multi-element optical antennas.  ... 
doi:10.1109/lanman.2007.4295973 dblp:conf/lanman/AkellaYK07 fatcat:ihemuvkmyje2bdbimtojm3mknq

Wideband photonic interference cancellation based on free space optical communication [article]

Yang Qi, Ben Wu
2021 arXiv   pre-print
We propose and experimentally demonstrate an interference management system that removes wideband wireless interference by using photonic signal processing and free space optical communication.  ...  The reference signals for interference cancellation are transmitted in a free space optical communication link, which provides large bandwidth for multi-band operation and accelerates the mixed signal  ...  Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.  ... 
arXiv:2107.10415v2 fatcat:ze4pcin6drakhbf3rj3cnnub2a

Identification and Sensing Experiments with Fiber-Bragg-grating-based Spectral Labels in Free-space Optics System

Yao-Tang Chang, Bo-Rong Huang, Chih-Lun Shao, Hsu-Chih Cheng
2018 Sensors and materials  
Keywords: fiber Bragg grating (FBG), fiber laser, spectral label identification/sensing, optical code division multiple access (OCDMA), free-space optics (FSO) system In this study, the spectral amplitude  ...  After multiple spectral-label signals were passed through a real free-space channel in air at normal atmospheric temperatures, the results of the identification and sensing experiment showed that the autocorrelation  ...  decoder [1 1 0] through the free-space channel for demodulation.  ... 
doi:10.18494/sam.2018.1935 fatcat:pnl47w2mqre6tej4dfgrtifx34

Long-distance free-space measurement-device-independent quantum key distribution [article]

Yuan Cao, Yu-Huai Li, Kui-Xing Yang, Yang-Fan Jiang, Shuang-Lin Li, Xiao-Long Hu, Maimaiti Abulizi, Cheng-Long Li, Weijun Zhang, Qi-Chao Sun, Wei-Yue Liu, Xiao Jiang (+11 others)
2020 arXiv   pre-print
However, owing to the effect of atmospheric turbulence, MDI-QKD over free-space channel remains experimentally challenging.  ...  Moreover, the technology developed here opens the way to quantum experiments in free space involving long-distance interference of independent single photons.  ...  two independent free-space channels.  ... 
arXiv:2006.05088v1 fatcat:75zwyqhc6fc4xes55aogi37r2y

Characterization and performance study of IP traffic in WDM networks

Liren Zhang, Junhua Tang
2001 Computer Communications  
On the other hand, the inter-channel interferences caused by ®ber nonlinear effect such as four wave mixing are also considered in the performance analysis.  ...  The statistics of network performance in terms of packet error probability, packet error free-run distribution and packet error-pattern distribution are presented.  ...  Frequency spacing between the optical channels is another important factor in the WDM system.  ... 
doi:10.1016/s0140-3664(01)00355-3 fatcat:rwbdrpmb5fdl7j27aq53e2f64e

Guest editorial: optical wireless communications

George Karagiannidis, Shlomi Arnon, John Barry, Robert Schober, Murat Uysal
2009 IEEE Journal on Selected Areas in Communications  
and the author of Wireless Infrared Communications (Norwell, MA: Kluwer, 1994).  ...  There are several sources of path loss, scattering and interference, which degrade the performance of outdoor optical wireless systems. Free space loss represents the portion of power lost to space.  ...  Farid and Hranilovic in "Channel Capacity and Non-Uniform Signalling for Free-Space Optical Intensity Channels", consider the design of capacity-approaching, nonuniform optical intensity signalling in  ... 
doi:10.1109/jsac.2009.091201 fatcat:j2ocfmqgp5h55bajooaprj44ai

Performance Evaluation of 32×40 Gbps (1. 28 Tbps) FSO Link using RZ and NRZ Line Codes

Jasvir Singh, Pushpa Gilawat, Balkrishna Shah
2014 International Journal of Computer Applications  
In this paper, the implementation of 32×40 Gbps free space optical (FSO) communication system is developed.  ...  Motivation to the current analysis is to compare RZ and NRZ lines codes in wavelength division multiplex communication system in free space optic channel and it is found that the NRZ line code is better  ...  Fig 4 : 4 BER for 1 km free space optics link using NRZ line codes Fig 5: BER for 1 km free space optics link using RZ line codes In Fig 6 Q-factor for 1 km free space optics channel using NRZ line coding  ... 
doi:10.5120/14831-3084 fatcat:fvc7wbojd5arxfaf64ssp33mdu

Performance Analysis of Q Factor Optical Communication in Free Space Optics and Single Mode Fiber

Salim Burdah, Octarina Nur Samijayani, Ary Syahriar, Rizki Ramdhani, Rahmat Alamtaha
2019 Universal Journal of Electrical and Electronic Engineering  
Therefore, in this paper, a performance analysis of Free Space Optics (FSO) and Single Mode Fiber is carried out based on the Quality Factor and Bit Error Rate (BER) of a signal that is carried out using  ...  FSO is an optical communication system that uses the atmosphere as its propagation medium and Optical Fiber uses silica as its propagation medium.  ...  This component models a free space optics (FSO) channel. It is a subsystem of two telescopes and the free space channel between them.  ... 
doi:10.13189/ujeee.2019.060311 fatcat:ltjukw3r2rcj7lajavg2o6vhzm

An Overview on Deployment Strategies for Global Quantum Key Distribution Networks

Jing Wang, Bernardo A. Huberman, Weizhi Meng
2022 Wireless Communications and Mobile Computing  
The state-of-the-art deployment strategies, including terrestrial QKD via optical fibers, free-space QKD via ground-based fixed links and ground-to-air dynamic links, and satellite QKD, are reviewed and  ...  compared in terms of channel loss, interference, distance limit, connection topology, and deployment cost.  ...  On the other hand, there is no interference from classical channels in free space and the coexistence of quantum and classical channels is no longer an issue.  ... 
doi:10.1155/2022/9927255 fatcat:c2w4xabxr5dh3dg3expun27uwa

Performance evaluation of turbulence-accentuated interchannel crosstalk for hybrid fibre and free-space optical wavelength-division-multiplexing systems using digital pulse-position modulation

Afamefuna M. Mbah, John G. Walker, Andrew J. Phillips
2016 IET Optoelectronics  
In many cases free space optical (FSO) communication links are easier and cheaper to deploy than optical fibre links [2, 8].  ...  A hybrid fibre and free space optical (FSO) communication link using digital pulse position modulation (DPPM) in a wavelength division multiplexing (WDM) system is proposed.  ...  The optical line terminator (OLT) is linked to a remote node (RN) via a feeder fibre and optical signals are distributed to the various optical network units (ONUs) through a turbulent free space channel  ... 
doi:10.1049/iet-opt.2015.0007 fatcat:bexswng54fg7rda2fudauvw2jy

Performance Comparison of APD and PIN Photodiodes using Different Modulation and Different Wavelengths

Priyanka Sharma, Himali Sarangal
2016 International Journal of Signal Processing, Image Processing and Pattern Recognition  
Free Space Optical communication systems to meet the growing need for high speed and tap proof communication systems. Free space optics causes the spatial and temporal fluctuation of light intensity.  ...  FSO is used to reduce the cost as well as in such places where physical optical wire usage is not possible.  ...  Acknowledgments The authors would like to thank Guru Nanak Dev University (GNDU) for providing us with optisystem software.  ... 
doi:10.14257/ijsip.2016.9.4.24 fatcat:yxo7j2j5e5cb3lpayfbcmz5flq

Investigation of a WDM M-QAM RoF-RoFSO System

Ehsan Hamidnejad, Asghar Gholami, Stanislav Zvanovec, Zabih Ghassemlooy
2020 2020 3rd West Asian Symposium on Optical and Millimeter-wave Wireless Communication (WASOWC)  
Keywords: radio over fiber (RoF), radio over free space optics (RoFSO), inter-channel interference I.  ...  Hybrid RoF and radio over free space optics (RoFSO) is a solution for the last mile access networks in urban areas and in areas where installation of RoF links is impractical and costly.  ...  Therefore, one possible solution to this would be the use of all-wireless radio over free space optics (RoFSO) technology, where the FSO section is compatible with optical fiber transmission in terms of  ... 
doi:10.1109/wasowc49739.2020.9409998 fatcat:dxjzqlfftzbxzjf2lhql444dru

Analysis of optical modulators for Radio over Free Space Optical Communication systems and Radio over Fiber systems

K Prabu, Sumanta Bose, D. Sriram Kumar
2012 2012 Annual IEEE India Conference (INDICON)  
Title Analysis of optical modulators for radio over free space optical communication systems and radio over fiber systems( Main Article (Preprint accepted version) ) Abstract -Radio over Free Space Optics  ...  Keywords -Electro Absorption Modulator (EAM), Free Space Optics (FSO), Mach-Zehnder Modulator (MZM), Radio over Fiber (RoF), Radio over Free Space Optics (RoFSO)  ...  SION or, Electro absorption ss free space channel have GSM signal was generated ical carrier signal by using ut signal intensities were were applied to the transfer and free space optical transmission  ... 
doi:10.1109/indcon.2012.6420795 fatcat:72wmiwkl4zbvnbhpfoegbbyfb4
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