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Dissertations / Theses on the topic 'Optical communication'

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1

Aladeloba, Abisayo Olufemi. "Optically amplified free-space optical communication systems." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13304/.

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This thesis investigates terrestrial atmospheric FSO communication systems operating under the influence of turbulence-induced scintillation, beam spreading, optical interchannel crosstalk, amplified spontaneous emission noise and pointing errors. On-off keying-non–return-to-zero (OOK-NRZ) and digital pulse position (DPPM) are the modulation schemes used for the calculations. The possibility of using sophisticated performance evaluation techniques such as moment generating function (MGF)-based Chernoff bound (CB), modified Chernoff bound (MCB) and saddlepoint approximation (SPA) for terrestria
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2

Boiyo, Duncan Kiboi, and Romeo Gamatham. "Optimization of flexible spectrum in optical transport networks." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/14609.

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The ever-increasing demand for broadband services by end-user devices utilising 3G/4G/LTE and the projected 5G in the last mile will require sustaining broadband supply from fibre-linked terminals. The eventual outcome of the high demand for broadband is strained optical and electronic devices. The backbone optical fibre transport systems and techniques such as dense wavelength division multiplexing (DWDM), higher modulation formats, coherent detection and signal amplification have increased both fibre capacity and spectrum efficiency. A major challenge to fibre capacity and spectrum efficienc
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3

Jiang, Junyi. "Optical wireless communication systems." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/387239/.

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In recent years, Optical Wireless (OW) communication techniques have attracted substantial attention as a benefit of their abundant spectral resources in the optical domain, which is a potential solution for satisfying the ever-increasing demand for increased wireless capacity in the conventional Radio Frequency (RF) band. Motivated by the emerging techniques and applications of OW communication, the Institute of Electrical and Electronics Engineers (IEEE) had released the IEEE standard 802.15.7 for short-range optical wireless communications, which categorised the Physical layer (PHY) of the
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4

Du, Hao. "Optical wireless MIMO communication." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/70945/.

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This thesis provides an in-depth investigation and evaluation of infrared optical wireless MIMO communication systems to be applied in both indoor and outdoor environment. The principle objective of the research is to demonstrate both the advantages and disadvantages of the optical wireless MIMO systems using different modulation types. The first part provided analyses of important OW configurations using APD receivers using WMC model and SISO, MISO, SIMO and MIMO configuration. Thus, an analytical expression for 2-1 MISO, 1-2 SIMO and MIMO was successfully developed. This part also illustrate
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5

Albuquerque, André Antunes de Carvalho. "All-optical signal processing for optical communication systems." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23624.

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Doutoramento em Engenharia Física<br>O processamento ótico de sinal é uma alternativa possível para melhorar o desempenho e eficiência de sistemas de comunicações óticas, mas o seu estágio atual de desenvolvimento é ainda insuficiente para aplicações em sistemas reais. De forma a inverter esta situação, novas estratégias e pos-sibilidades para processamento ótico de sinal são aqui investigadas, com ênfase em conversão de comprimento de onda, regeneração de fase e amplificação sensível à fase em dispositivos de niobato de lítio com inversão periódica dos domínios ferroelétricos e fibras forteme
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6

Males, Mladen. "Suppression of transient gain excursions in an erbium-doped fibre amplifier /." Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0157.

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7

Song, Yunbin. "Optical Communication Systems for Smart Dust." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34679.

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In this thesis, the optical communication systems for millimeter-scale sensing and communication devises known as "Smart Dust" are described and analyzed. A smart dust element is a self-contained sensing and communication system that can be combined into roughly a cubic-millimeter mote to perform integrated, massively distributed sensor networks. The suitable passive optical and fiber-optic communication systems will be selected for the further performance design and analysis based on the requirements for implementing these systems. Based on the communication link designs of the free-space
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8

Curty, Alonso Marcos. "Cryptographic protocols in optical communication." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979048621.

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9

Chapple, Rebecca Jane. "Communication problems in optical networks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq37496.pdf.

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10

Yen, Brent J. 1977. "Multiple-user quantum optical communication." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30244.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Includes bibliographical references (p. 133-138).<br>A fundamental understanding of the information carrying capacity of optical channels requires the signal and physical channel to be modeled quantum mechanically. This thesis considers the problems of distributing multi-party quantum entanglement to distant users in a quantum communication system and determining the ability of quantum optical channels to reliably transmit information. A recent proposal for a quantum communica
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11

Håkansson, Martin, and Tom Åkerström. "Embedded high speed optical communication." Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209581.

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The telecom industry is today categorized by being able to wirelessly transmit large amounts of data between systems in a short time. A precondition for this is that the PCBs (printed circuit board) being developed and manufactured can handle and distribute large amounts of data internally. Often presented as multiple high-speed links up to 10-28 Gbit/s. The PCBs of today contains electric conductors, which all lead from one point to another, with no possibility of branching or flexibility without being rebuilt. A significant problem with all these electric conductors in the PCBs and all the P
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12

Alhartomi, Mohammed. "Collaborative optical wireless communication systems." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/13153/.

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13

Mysore, Sudhesh M. "Advances in optical power budgets and bandwidth capacity of broadband networks /." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9953885.

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14

Hao, Miin-Jong. "Performance evaluation of practival FSK, CPFSK, and ASK detection schemes for coherent optical fiber communication systems." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15686.

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15

Croussore, Kevin. "ALL-OPTICAL REGENERATION FOR PHASE-SHIFT KEYED OPTICAL COMMUNICATION SYSTEMS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2481.

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All-optical signal processing techniques for phase-shift keyed (PSK) systems were developed theoretically and demonstrated experimentally. Nonlinear optical effects in fibers, in particular four-wave mixing (FWM) that occurs via the ultra-fast Kerr nonlinearity, offer a flexible framework within which numerous signal processing functions can be accomplished. This research has focused on the regenerative capabilities of various FWM configurations in the context of processing PSK signals. Phase-preserving amplitude regeneration, phase regeneration, and phase-regenerative wavelength conversion ar
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16

Marco, Rider Jaime. "Optical communication with underwater snake robots : Design and implementation of an underwater wireless optical communication system." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37803.

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Eelume AS is a norwegian company that develops autonomous underwater vehicles. Their flagship model is an underwater snake robot that performs inspection, maintenance and repair operations. For the time being, Eelume has been using acoustic communications between their AUV's and the docking station, but it has a big drawback: bandwidth. Eelume is interested in streaming live high-quality video from their AUV's to the docking station, which requires several megabits per second. As underwater radio frequency communications are not possible, wireless optical communications seem to be the best ava
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17

West, Lamar. "Analysis and simulation of reverse path laser clipping in subcarrier multiplexed hybrid fiber coax networks." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13301.

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18

Pudo, Dominik. "On the temporal Talbot effect in optical communication systems." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103279.

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Presented in this thesis is a study of the Temporal Talbot effect within the context of return-to-zero data communication systems. First, we examine its features and limitations subject to realistic input conditions. We consider three independent impairments in the incident pulse train: excessively broad pulse width, amplitude noise, and timing jitter. In addition to determining and quantifying the effects of all these impairments, we demonstrate a beneficial, mitigating effect of the Talbot self-imaging process on the two last ones. We then demonstrate a novel, tunable pulse repetition multip
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19

Chakraborty, Kaushik. "Reliable communication over optical fading channels." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2855.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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20

Meijerink, Arjan. "Coherence multiplexing for optical communication systems." Enschede : University of Twente [Host], 2005. http://doc.utwente.nl/50841.

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21

ABELEM, ANTONIO JORGE GOMES. "MULTICAST COMMUNICATION IN OPTICAL IP INTERNETWORKS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3898@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>A difusão seletiva e os recentes avanços na tecnologia de transmissão óptica, mais especificamente na multiplexação por comprimento de onda (Wavelength Division Multiplexing- WDM), aliados à consolidação do IP como protocolo dominante das redes convergentes, vêm oferecendo novas perspectivas para as futuras gerações de inter-redes. Este trabalho faz uso da evolução dessas tecnologias para propor um conjunto de adaptações à difusão seletiva, em especial ao IP Multicast, denominado MIRROR (Multicast IP para Redes baseadas
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22

Yekani, Khoei Aminreza. "Advanced modulation for optical communication systems." Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/33709.

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La demande toujours croissante pour la capacité du réseau conduit au développement de systèmes de communication optique pour couvrir les normes Terabit Ethernet récemment proposées. Les applications de courte distance nécessitent une solution peu coûteuse et peu complexe avec détection directe. Cependant, le coût de la détection cohérente diminue chaque jour et en fait un bon candidat pour les applications à courte distance futures afin d'accroître l'efficacité spectrale et d'utiliser des formats de modulation avancés. Dans cette thèse, nous étudions des solutions pour les applications court-c
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23

Allen, Katherine M. "Dark solitons in optical communication systems." Thesis, Aston University, 1995. http://publications.aston.ac.uk/8098/.

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This thesis presents experimental and theoretical work on the use of dark optical solitons as data carriers in communications systems. The background chapters provide an introduction to nonlinear optics, and to dark solitons, described as intensity dips in a bright background, with an asymmetrical phase profile. The motivation for the work is explained, considering both the superior stability of dark solitons and the need for a soliton solution suitable for the normal, rather than the anomalous (bright soliton) dispersion regime. The first chapters present two generation techniques, producing
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24

Arain, Muzamil Arshad. "INTERFEROMETRY-BASED FREE SPACE COMMUNICATION AND INFORMATION PROCESSING." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3304.

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This dissertation studies, analyzes, and experimentally demonstrates the innovative use of interference phenomenon in the field of opto-electronic information processing and optical communications. A number of optical systems using interferometric techniques both in the optical and the electronic domains has been demonstrated in the filed of signal transmission and processing, optical metrology, defense, and physical sensors. Specifically it has been shown that the interference of waves in the form of holography can be exploited to realize a novel optical scanner called Code Multiplexed Optica
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25

Males, Mladen. "Suppression of transient gain excursions in an erbium-doped fibre amplifier." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0157.

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This thesis reports original work on suppression of transient gain excursions in an erbium-doped fibre amplifier (EDFA). The work presented in this thesis is a detailed investigation of four closed-loop systems that control the EDFA gain dynamically. The performance of the four closed-loop systems is evaluated by analytical work, supplemented by computer simulations and insystem measurements performed on a hardware EDFA. In addition, a stability analysis of the four closed-loop systems is presented. In the stability analysis presented in this thesis, nonlinear nature of the four closed-loop sy
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26

Ware, Cédric. "On optical functionalities and high-capacity communication networks." Habilitation à diriger des recherches, Telecom ParisTech, 2013. http://tel.archives-ouvertes.fr/tel-00983948.

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The global communications network has become a pervasive and critical item of everyday life, spawning and enabling countless worldwide services that went from nonexistent to must-have in less than a decade. Its implementation makes considerable use of optical transmission systems, which are the physical medium of choice for most non-wireless links, being capable of high data rates over long distances. However, the potential of optics is still underexploited, and can help a smarter network meet the simultaneous challenges of ever-higher data rates, network switching, and the "last-mile" access
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27

Liu, Cheng. "Advanced system design and signal processing techniques for converged high-speed optical and wireless applications." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49058.

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The ever-increasing data traffic demand drives the evolution of telecommunication networks, including the last-mile access networks as well as the long-haul backbone networks. This Ph.D. dissertation focuses on system design and signal processing techniques for next-generation converged optical-wireless access systems and the high-speed long-haul coherent optical communication systems. The convergence of high-speed millimeter-wave wireless communications and high-capacity fiber-optic backhaul networks provides tremendous potential to meet the capacity requirements of future access networks. In
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28

Bhandare, Suhas. "Application of lithium niobate based integrated optical circuits to optical communication." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971581703.

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29

Guizani, Sghaier. "Optical post chromatic dispersion compensation in an optical fiber communication system." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2008. http://www.uqtr.ca/biblio/notice/resume/30055578R.pdf.

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30

Angeh, Wolfgang Ondua. "Design and performance analysis of a survivable metropolitan area fiber optic communication network." Master's thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-02022010-020030/.

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31

Ketprom, Urachada. "Line-of-sight propagation of optical wave through multiple-scatter channel in optical wireless communication system /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/6057.

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32

Yuan, Ping. "Gain, noise and bandwidth of avalanche photodiodes with thin multiplication regions /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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33

Annen, Richard. "CMOS VCSEL drivers for optical interchip communication /." [S.l.] : [s.n.], 2001. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14081.

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34

Zeng, Zhaoquan. "A survey of underwater wireless optical communication." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55675.

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Underwater wireless communication refers to transmitting data in unguided water environment through the use of wireless carriers, i.e., radio-frequency wave, acoustic wave, and optical wave. We focus, in this thesis, on the underwater wireless optical communication (UWOC) that employs optical wave as the transmission carriers. In comparison to RF and acoustic counterparts, UWOC has a much higher transmission bandwidth, thus providing much higher data rate. Due to this high-speed transmission advantage, UWOC has attracted considerable attention in recent years. Many potential applications of UW
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35

Lu, Zeqin. "Silicon photonic switches for optical communication applications." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63132.

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Optical switches are used for signal switching in optical communication networks. Silicon photonics is a low-cost and mature technology to develop high-performance optical switches. This thesis is a theoretical and experimental study on silicon photonic switches, featuring broadband, low-power, high-speed, and low-crosstalk performance. Broadband 3-dB couplers are fundamental building blocks for broadband switches based on Mach-Zehnder interferometer (MZI) structures. A broadband 3-dB coupler, which has a 100 nm operation bandwidth with coupling imbalance being much less than its competitors,
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36

Mokhtar, Makhfudzah. "Improved digital ternary performance in optical communication." Thesis, University of Essex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438135.

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37

Ingham, Jonathan David. "Technologies for multimode-fibre optical communication systems." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406971.

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38

Riesing, Kathleen Michelle. "Portable optical ground stations for satellite communication." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119269.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 113-125).<br>Small satellite technical capabilities continue to grow and launch opportunities are rapidly expanding. Several commercial constellations of small satellites for Earth observation and communications are making their way onto or
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39

Moores, John Demeritt. "All-optical soliton communication : devices and limitations." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12212.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.<br>Includes bibliographical references (leaves 140-157).<br>by John Demeritt Moores.<br>Ph.D.
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40

Brundage, Heather. "Designing a wireless underwater optical communication system." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57699.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 61-63).<br>Though acoustic modems have long been the default wireless communication method for underwater applications due to their long range, the need for high speed communication has prompted the exploration of non-acoustic methods that have previously been overlooked due to their distance limitations. One scenario that drives this need is the monitoring of deep sea oil wells by AUVs that could be stationed at the we
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41

Spiez, Michal Krzysztof. "Light communication - digital interface : USB - optical receiver." Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/2038.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Os sistemas de comunicação por luz visível surgem como uma alternativa aos tradicionais sistemas de comunicação ópticos por raios infravermelhos. Esta alternativa tem por base a rápida evolução dos dispositivos de iluminação de estado sólido. Até há bem pouco tempo, as tradicionais lâmpadas incandescentes ou fluorescentes dominavam a tecnologia de iluminação. Recentemente, os dispositivos de estado sólido, como por exemplo, os LEDs (Light Emiting Diodes) de alta intensidade, tem evidenciado as suas vantagens neste domínio: maior efici
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42

Pimpalkhare, Mangesh S. "Linearly repeatered communication systems using optical amplifiers." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042010-020243/.

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43

ROSA, BRUSIN ANN MARGARETH. "Machine Learning Applications to Optical Communication Systems." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2967019.

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44

Parand, Farivar. "Cellular optical wireless communications systems." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270654.

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45

Morandotti, Roberto. "Discrete optical solitons." Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300979.

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46

Kandlikar, Milind. "Low frequency cutoff effects in fiber optic communication systems." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/44683.

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<p> The presence of low frequency cutoffs in the forward path of the information signal leads to inter-symbol interference (ISI) and degradation of the signal to noise ratio at the sampling instant in digital on-off keying (OOK) systems. The low frequency cutoffs occur as a result of the presence of power separation filters in a line wire system and gain instability of APDâ s to D.C. in fiber optic systems. Also, it is easier to design amplifiers that do not extend to D.C. The ISI which manifests itself in the form of baseline wander can cause appreciable degradation in the signal to n
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47

Zhang, Zheshen. "New techniques for quantum communication systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42843.

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Although mathematical cryptography has been widely used, its security has only been proven under certain assumptions such as the computational power of opponents. As an alternative, quantum communication, in particular quantum key distribution (QKD) can get around unproven assumptions and achieve unconditional security. However, the key generation rate of practical QKD systems is limited by device imperfections, excess noise from the quantum channel, limited rate of true random-number generation, quantum entanglement preparation, and/or post-processing efficiency. This dissertation contributes
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48

Li, Ji. "Design and analysis of survivable WDM mesh networks." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38574846.

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49

Bar, Siman Tov Omar. "Adaptive optimization of a free-space laser communication system under dynamic link attenuation." Diss., Online access via UMI:, 2009.

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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Electrical and Computer Engineering, 2009.<br>Includes bibliographical references.
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50

Chen, Hui. "Inline rise-time measurement using amplitude histograms for fiber-optic communication systems /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202003%20CHENH.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 64-66). Also available in electronic version. Access restricted to campus users.
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