Dissertations / Theses on the topic 'Signal devices'
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Davison, Alan Stephen. "All-optical signal processing devices." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316729.
Full textTaji, Bahareh. "Signal Quality Assessment in Wearable ECG Devices." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38851.
Full textMcGhee, Joseph. "Models, measures and signals : collected works in modelling, measurement science and technology and signal engineering." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248818.
Full textAtabaki, Amir Hossein. "Reconfigurable silicon photonic devices for optical signal processing." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41207.
Full textLiu, Haibo. "SEED devices used in optical signal processing applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25657.pdf.
Full textPenty, Richard Vincent. "Novel optical fibre Kerr devices for signal processing." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291606.
Full textMcDougall, Robert Campbell. "Hybrid integration for all-optical signal processing devices." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614278.
Full textDrummond, Miguel Vidal. "Photonic devices for optical and RF signal processing." Doctoral thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7562.
Full textO presente trabalho tem por objectivo o estudo de novos dispositivos fotónicos aplicados a sistemas de comunicações por fibra óptica e a sistemas de processamento de sinais RF. Os dispositivos apresentados baseiam-se em processamento de sinal linear e não linear. Dispositivos lineares ópticos tais como o interferómetro de Mach-Zehnder permitem adicionar sinais ópticos com pesos fixos ou sintonizáveis. Desta forma, este dispositivo pode ser usado respectivamente como um filtro óptico em amplitude com duas saídas complementares, ou, como um filtro óptico de resposta de fase sintonizável. O primeiro princípio de operação serve como base para um novo sistema fotónico de medição em tempo real da frequência de um sinal RF. O segundo princípio de operação é explorado num novo sistema fotónico de direccionamento do campo eléctrico radiado por um agregado de antenas, e também num novo compensador sintonizável de dispersão cromática. O processamento de sinal é não linear quando sinais ópticos são atrasados e posteriormente misturados entre si, em vez de serem linearmente adicionados. Este princípio de operação está por detrás da mistura de um sinal eléctrico com um sinal óptico, que por sua vez é a base de um novo sistema fotónico de medição em tempo real da frequência de um sinal RF. A mistura de sinais ópticos em meios não lineares permite uma operação eficiente numa grande largura espectral. Tal operação é usada para realizar conversão de comprimento de onda sintonizável. Um sinal óptico com multiplexagem no domínio temporal de elevada largura de banda é misturado com duas bombas ópticas não moduladas com base em processos não lineares paramétricos num guia de ondas de niobato de lítio com inversão periódica da polarização dos domínios ferroeléctricos. Noutro trabalho, uma bomba pulsada em que cada pulso tem um comprimento de onda sintonizável serve como base a um novo conversor de sinal óptico com multiplexagem no domínio temporal para um sinal óptico com multiplexagem no comprimento de onda. A bomba é misturada com o sinal óptico de entrada através de um processo não linear paramétrico numa fibra óptica com parâmetro não linear elevado. Todos os dispositivos fotónicos de processamento de sinal linear ou não linear propostos são experimentalmente validados. São também modelados teoricamente ou através de simulação, com a excepção dos que envolvem mistura de sinais ópticos. Uma análise qualitativa é suficiente nestes últimos dispositivos.
This work investigates novel photonic devices for optical fiber communication systems and microwave photonics. Such devices rely on linear and nonlinear optical signal processing. Basic linear optical devices such as the Mach-Zehnder delay interferometer enable delaying and adding optical signals with fixed or variable weights. Therefore, such device can be respectively used as an optical amplitude filter with two complementary optical outputs, or, as an optical phase filter with tunable group delay response. The first operation principle is explored in a novel instantaneous RF frequency measurement system, whereas the latter serves as basis to a novel photonic beamforming system for a phase array antenna, and also to a novel tunable optical dispersion compensator. Nonlinear optical signal processing is obtained when optical signals are delayed and mixed, instead of being linearly added. Such operation principle is behind electro-optical mixing, which is explored in a novel instantaneous RF frequency measurement system. All-optical mixing enables ultra-fast and thereby broad bandwidth operation. This operation principle is explored to obtain tunable wavelength conversion. An optical time division multiplexed signal with a large spectral width is parametrically mixed with two continuous wave pumps in a periodically-poled lithium niobate waveguide. Instead of continuous wave pumps, a pulsed pump in which each pulse has a tunable wavelength enables a novel routable optical time-to-wavelength division converter. The pump signal is parametrically mixed with the input optical signal in a highly nonlinear optical fiber. All the proposed linear and nonlinear optical signal processing devices are experimentally validated. In addition, theoretical modeling and simulations are presented in all concepts, with the exception of the ones which employ alloptical mixing. A qualitative analysis is sufficient for the latter devices.
Amprikidis, Michael. "Vibration sensing using piezoelectric devices and signal conditioning." Thesis, University of Manchester, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488086.
Full textHowell, Mark John. "Signal processing for X ray spectroscopy." Thesis, Bangor University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361173.
Full textEhteshami, Nasrin. "Silicon Photonic Devices for Microwave Signal Generation and Processing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34111.
Full textKoos, Christian. "Nanophotonic devices for linear and nonlinear optical signal processing." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://d-nb.info/987044451/34.
Full textJin, M. "SOI technology for MOS devices and mixed signal applications." Thesis, Queen's University Belfast, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437426.
Full textHalimic, Mirsad Kjazim. "Performance improvement of dynamic weighing systems using optimal control and advanced signal processing methods." Thesis, Brunel University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249791.
Full textChen, Jianxiao. "Tunable electro-optic devices for fiber optical RF signal processing." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3203495.
Full textTitle from first page of PDF file (viewed March 1, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
Yoon, Kwang Sub. "A precision analog small-signal model for submicron MOSFET devices." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/14935.
Full textCorbari, Costantino. "Development of non-linear waveguide devices for optical signal processing." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/65506/.
Full textSchneider, Bradley A. "Gait Analysis from Wearable Devices using Image and Signal Processing." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1514820042511803.
Full textHuang, Jie. "Multifunctional optical signal-processing devices in periodically poled lithium niobate /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Full textKim, Sangtaek. "Acousto-optic devices for optical signal processing and quantum computing." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3303851.
Full textClausen, William. "Small and large signal modeling of MM-Wave MHEMT devices." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000177.
Full textPinto, Domenico. "Numerical modelling of photonic crystals devices for all-optical signal processing." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511143.
Full textCall, John B. "Large-signal characterization and modeling of nonlinear devices using scattering parameters." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35548.
Full textMaster of Science
Teixeira, Hugo Miguel dos Santos. "Nonlinear behavioral modeling of mixed signal RF-digital I/O devices." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12048.
Full textEsta tese investiga a caracterização (e modelação) de dispositivos que realizam o interface entre os domínios digital e analógico, tal como os buffers de saída dos circuitos integrados (CI). Os terminais sem fios da atualidade estão a ser desenvolvidos tendo em vista o conceito de rádio-definido-por-software introduzido por Mitola. Idealmente esta arquitetura tira partido de poderosos processadores e estende a operação dos blocos digitais o mais próximo possível da antena. Neste sentido, não é de estranhar que haja uma crescente preocupação, no seio da comunidade científica, relativamente à caracterização dos blocos que fazem o interface entre os domínios analógico e digital, sendo os conversores digital-analógico e analógico-digital dois bons exemplos destes circuitos. Dentro dos circuitos digitais de alta velocidade, tais como as memórias Flash, um papel semelhante é desempenhado pelos buffers de saída. Estes realizam o interface entre o domínio digital (núcleo lógico) e o domínio analógico (encapsulamento dos CI e parasitas associados às linhas de transmissão), determinando a integridade do sinal transmitido. Por forma a acelerar a análise de integridade do sinal, aquando do projeto de um CI, é fundamental ter modelos que são simultaneamente eficientes (em termos computacionais) e precisos. Tipicamente a extração/validação dos modelos para buffers de saída é feita usando dados obtidos da simulação de um modelo detalhado (ao nível do transístor) ou a partir de resultados experimentais. A última abordagem não envolve problemas de propriedade intelectual; contudo é raramente mencionada na literatura referente à caracterização de buffers de saída. Neste sentido, esta tese de Doutoramento foca-se no desenvolvimento de uma nova configuração de medição para a caracterização e modelação de buffers de saída de alta velocidade, com a natural extensão aos dispositivos amplificadores comutados RF-CMOS. Tendo por base um procedimento experimental bem definido, um modelo estado-da-arte é extraído e validado. A configuração de medição desenvolvida aborda não apenas a integridade dos sinais de saída mas também do barramento de alimentação. Por forma a determinar a sensibilidade das quantias estimadas (tensão e corrente) aos erros presentes nas diversas variáveis associadas ao procedimento experimental, uma análise de incerteza é também apresentada.
This thesis investigates the characterization (and modeling) of devices that perform the interface between the digital and analog domains, such as the output buffers of the Integrated Circuits (ICs). Modern wireless transceivers are moving towards the software-defined radio (SDR) concept proposed by Mitola. The ideal architecture makes use of powerful digital signal processors (DSP) and extends the digital blocks’s operation as close as possible to the antenna. In this way, it is not surprising that there is a growing concern regarding the characterization of the blocks that perform the interface between the analog and digital domains, being the analog-to-digital and digital-to-analog converters (ADCs/DACs) two good examples of these circuits. Within the high speed digital circuits, such as Flash memories, a similar role is played by the output buffers. They act as an interface between the digital (logic core) and the analog radio frequency domains (package/printed circuit board), determining the signal integrity of the transmitted data. In order to speed up the signal integrity analysis, at the design stage, it is fundamental to have models that are simultaneously computationally efficient and accurate. Typically, the extraction/validation of models for output buffers is performed by using characterization data obtained from either the simulation of the transistor level model (if available) or from measurements. The latter approach is not sensitive to intellectual property issues but is rarely addressed in literature referred to output buffers’ characterization. Therefore, this thesis addresses the development of a novel measurement setup for the characterization and modeling of high speed output buffers, naturally extendable to switched-mode RF-CMOS amplifiers. Based on a welldefined experimental procedure, a state of the art model is extracted and validated. The developed measurement setup addresses not only the integrity of the output signals (signal integrity) but also of the power supply voltages (power integrity). In order to determine the sensitivity of the estimated quantities (voltage and current) to the errors in the different variables of the experimental procedure, an uncertainty analysis is presented.
Brosi, Jan-Michael. "Slow-light photonic crystal devices for high-speed optical signal processing." Karlsruhe : Universitätsverlag, 2009. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000009905.
Full textBrosi, Jan-Michael. "Slow light photonic crystal devices for high speed optical signal processing." Karlsruhe Univ.-Verl. Karlsruhe, 2008. http://d-nb.info/992585090/04.
Full textSenthinathan, Ramesh 1961. "Signal integrity and simultaneous switching noise of CMOS devices and systems." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/565539.
Full textKale, Kaustubh R. "Low complexity, narrow baseline beamformer for hand-held devices." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001223.
Full textCordero, Álvarez Rafael. "Subcutaneous Monitoring of Cardiac Activity for Chronically Implanted Medical Devices." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS020.
Full textThe aim of this doctoral thesis was the development of sensors and algorithms for the improved monitoring of cardiac activity in the subcutaneous implantable cardioverter-defibrillator (SICD). More precisely, to improve the detection specificity of dangerous tachyarrhythmia such as ventricular tachycardia (VT) and ventricular fibrillation (VF). Two independent VT/VF detection schemes were developed for this: one electrophysiological in nature, and the other hemodynamic. The electrophysiological sensing scheme relied on a special ECG that was recorded along a short dipole located above the lower left pectoralis major. This short dipole maximised R/T ratio and signal-to-noise ratio in a total of 9 healthy volunteers. In theory, it will reduce the risk of false positive VT/VF detections simply by consequence of the dipole size, location, and orientation and independently of any further signal processing methods. The hemodynamic sensing scheme relied on cardiac vibrations recorded from two tri-axial accelerometer prototype sensors. These subcutaneous cardiac vibrations were characterised, physiologically validated, and optimised via their filtering along specific bandwidths and projection along a patient specific reference frame. The world’s first independent cardiac vibration VF detection algorithm was developed operating on these optimised signals. The same accelerometer prototypes were also shown to be able to record respiratory accelerations and detect apnoea. A final subcutaneous lead prototype was developed capable of recording the short dipole ECG, cardiac vibrations, and respiratory accelerations. It consisted of three electrodes, a bi-axial accelerometer, and industry-standard device connectors. The prototype lead was implanted in a fourth and final animal
Koos, Christian [Verfasser]. "Nanophotonic devices for linear and nonlinear optical signal processing / von Christian Koos." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://d-nb.info/987044451/34.
Full textVenkatesha, Divya. "Small signal characterisation of microwave active and passive devices using eye diagrams." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.625128.
Full textPashine, Rajat. "Signal analysis for multiple target materials through wavelet transforms." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Pashine_09007dcc8074b5e0.pdf.
Full textVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 8, 2010) Includes bibliographical references (p. 46-47).
Thomson, Kyle E. "Hardware considerations of space-time processing in implantable neuroprosthetic devices." Diss., Connect to online resource - MSU authorized users, 2006.
Find full textTitle from PDF t.p. (viewed on Nov. 20, 2008) Includes bibliographical references (p. 51-52). Also issued in print.
Lauermann, Matthias [Verfasser]. "Silicon-organic hybrid devices for high-speed electro-optic signal processing / Matthias Lauermann." Karlsruhe : KIT Scientific Publishing, 2018. http://www.ksp.kit.edu.
Full textЗубков, О. В., І. В. Свид, О. С. Мальцев, and Л. Ф. Сайківська. "In-circuit Signal Analysis in the Development of Digital Devices in Vivado 2018." Thesis, Theoretical and Applied Aspects of Device Development on Microcontrollers and FPGAs, MC&FPGA-2019, 2019. https://doi.org/10.35598/mcfpga.2019.003.
Full textЗубков, О. В., І. В. Свид, О. С. Мальцев, and Л. Ф. Сайківська. "In-circuit Signal Analysis in the Development of Digital Devices in Vivado 2018." Thesis, NURE, MC&FPGA, 2019. https://mcfpga.nure.ua/conf/2019-mcfpga/10-35598-mcfpga-2019-003.
Full textHarter, Tobias [Verfasser], and C. [Akademischer Betreuer] Koos. "Wireless Terahertz Communications: Optoelectronic Devices and Signal Processing / Tobias Harter ; Betreuer: C. Koos." Karlsruhe : KIT Scientific Publishing, 2021. http://d-nb.info/1235140962/34.
Full textHarter, Tobias [Verfasser], and C. [Akademischer Betreuer] Koos. "Wireless Terahertz Communications: Optoelectronic Devices and Signal Processing / Tobias Harter ; Betreuer: C. Koos." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1219577936/34.
Full textPaulsen, Ronald Ray 1951. "DESIGN AND BUILD OF A STORAGE SYSTEM FOR STRESS TESTING (WORD GENERATOR, SIGNAL SOURCE)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/291237.
Full textSchlottmann, Craig Richard. "Analog signal processing on a reconfigurable platform." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29623.
Full textCommittee Chair: Hasler, Paul; Committee Member: Anderson, David; Committee Member: Ghovanloo, Maysam. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Birr, Tobias [Verfasser]. "Investigation of plasmonic structures for use as sensors and signal processing devices / Tobias Birr." Hannover : Technische Informationsbibliothek (TIB), 2017. http://d-nb.info/1153076330/34.
Full textCardoso, Adilson Silva. "Design and characterization of BiCMOS mixed-signal circuits and devices for extreme environment applications." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53099.
Full textLentine, Anthony L. "Issues in the design of self electro-optic effect devices for optical signal processing." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1474.
Full textLee, Ju Han. "All-optical nonlinear signal processing devices and their applications within fibre-optic communication systems." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/42436/.
Full textClausen, William 1972. "Small and large signal modeling of MM-Wave MHEMT devices [electronic resource] / by William Clausen." University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000177.
Full textDocument formatted into pages; contains 155 pages.
Thesis (M.S.E.E.)--University of South Florida, 2003.
Includes bibliographical references.
Text (Electronic thesis) in PDF format.
ABSTRACT This research effort advances millimeter-wave transistor modeling in a current RF/Microwave circuit simulator (Agilent's Advanced Design System-ADS) for small-signal noise and large signal simulations. The device modeled is a metamorphic High Electron Mobility Transistor (mHEMT) supplied by Raytheon RF components. Because of their structure, these new low noise devices are used in this work to test the abilities to accurately model in the sub 0.5dB noise figure territory and to study model prediction into W-band (75-110 GHz). New modeling issues discussed in this thesis involve the effects of noise modeling in relation to the small-signal model parameters. The noise modeling identifies two methods of extraction and how to determine good noise data.
ABSTRACT: Other modeling topics addressed are the use of an advanced nonlinear model, and the ability to optimize for gain compression in the nonlinear model. Several measurement systems were used in the extraction and validation of this modeling effort. They consist of the ATN NP5 noise system, Maury Automated Tuner System, Agilent's IC-CAP, and Gateway's Special. The concept behind using these systems was to construct a complete modeling reference for a transistor and validate it against noise parameter and nonlinear measured data. Since the modeling work for this thesis is built on previous work, one goal has been to bring past USF field-effect transistor (FET) modeling efforts up to date and refine them for future use. The noise measurements were compared to results from Raytheon to validate the USF ATN noise parameter measurement system. Also the IC-CAP modeling system has been validated in measuring the test devices using the Maury load-pull system.
ABSTRACT: Small-signal and noise modeling were accomplished using techniques standardized from several technical papers and prior USF Ph.D. work relative to the model extraction. The IC-CAP modeling software also provided a straightforward platform for large-signal model extraction that is documented in this thesis. Using optimization in ADS, a final nonlinear was created. Measured DC, S-parameter, noise parameters, harmonic power, TOI, load-pull, and efficiency measurements were shown to compare well with model data simulated in ADS. Temperature scaling was also executed using a linear approximation of model values over measured temperatures in the noise model. The results presented show that the models developed illustrate good fitting of the behavior of the mHEMT device.
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BANDI, DILIP KUMAR. "Small Signal Impedance and Optical Modulation Bandwidth Characterization and Modeling of Organic Light Emitting Devices." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1204912125.
Full textMiri, Seyed-Mehdi. "Modeling and fault detection in electromagnetic devices : applications to synchronous machines and signal conditioning systems /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487332636476273.
Full textBaldwin, Kevin. "Computer aided design and simulation of an integrated photonic delay line system for phased array antenna and other microwave signal processing applications /." Online version of thesis, 1993. http://hdl.handle.net/1850/11081.
Full textFraser, David Raye. "Implementation of a modal filtering procedure." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28382.
Full textApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Drew, Stephen. "Symmetric Gain Optoelectronic Mixers for LADAR Applications." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/DrewS2009.pdf.
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