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CAMILHER, DALTON VILELA. "AUTOCALIBRATION OF FREQUENCY STANDARDS USING THE INTERNET". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2000. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2015@1.
Pełny tekst źródłaA calibração de padrões atômicos de tempo e freqüência, na forma atualmente realizada, apresenta o inconveniente de ter que se fazer o transporte do Padrão de Transferência até os laboratórios onde se encontram os padrões a serem calibrados. Isto se dá pelo fato destes laboratórios não possuírem uma maneira adequada para enviarem seus padrões ao Departamento do Serviço da Hora do Observatório Nacional (DSH/ON), órgão responsável perante o INMETRO na calibração em tempo e freqüência e detentor do Padrão Nacional. Propõe- se aqui a substituição do procedimento atual por um sistema de calibração automática via Internet, o que elimina a necessidade do deslocamento do Padrão de Transferência. Neste novo sistema de calibração, a referência passa a ser um receptor de GPS (Global Position Sistem), que assume o papel de Padrão de Transferência, ao qual o padrão a ser calibrado é ininterruptamente comparado. O acesso e armazenamento dos dados pelo DSH/ON é feito por meio de um programa que controla remotamente a calibração no laboratório via conexão pela Internet. O presente trabalho envolve uma comparação entre o sistema atual e o proposto aqui, todo o desenvolvimento e apresentação do programa computacional, a montagem de um sistema completo de simulação prática, inclusive com acesso remoto via Internet, a coleta e tratamento dos dados e a apresentação do procedimento utilizado para se chegar à incerteza de medição do sistema. Procura-se ressaltar a vantagem de um sistema de calibração automático, quanto à coleta dos dados, assim como a não dependência do transporte do Padrão de Transferência para a realização da calibração, evitando- se com isto a sua deterioração . Na conclusão deste trabalho a incerteza obtida é comparada com a do procedimento atualmente em prática e a partir desta comparação são feitas considerações quanto à implementação do novo sistema e ao uso do r eceptor de GPS como Padrão de Transferência.
The time and frequency calibration of atomic standards presents the inconvenience of the need of transportation of the Transfer Standard to the laboratories in which stay the standards to be calibrate. This happens because the laboratories do not possess a way to send its standards to the Departamento do Serviço da Hora do Observatório Nacional (DSH/ON), organ representative of INMETRO in Time and Frequency calibrations and detainer of the National Standard. This work intends the substitution of the procedure adopted today by a system of automatic calibration using Internet, eliminating the need of the displacement of the Transfer Standard. In this new procedure, the reference is t he Global Position Sistem (GPS) receiver, assuming the role of the Transfer Standard, to which the standard to be calibrate is compared continuosly. The access and storage of the data for the DSH/ON are made by means of a computer code that remotely controls the calibration through an Internet connection. The present work involves a comparison among both systems, the whole development and presentation of the computer code, the assembling of a complete system of practical simulation, the acquisition and data treatment and the presentation of the procedure used to obtain the measurement of the uncertainty. The advantage of an automatic calibration system, as well as of the collection of the data, is the fact that it not depending of the transportation of the Reference Standard for the accomplishment of the calibratio. As a conclusion of this work the obtained uncertainty is compared with the one in use today and based in this comparison we made considerations about the implementation of the new system and the use of the GPS receiver as Transfer Standard.
La calibración de padrones atómicos de tiempo y frecuencia, en la forma actualmente realizada, tiene el inconveniente de tener que realizar el transporte del Padrón de Transferencia hasta los laboratorios donde se encuentran los padrones que serán calibrados. Esto se debe al hecho de que estos laboratorios no poseen una manera adecuada para enviar sus padrones al Departamento de Servicio de la Hora del Observatorio Nacional (DSH/ON), óprgano responsable frente al INMETRO en la calibración en tiempo y frecuencia y detentor del Padrón Nacional. Se propone aqui la substituición del procedimiento actual por un sistema de calibración automática vía Internet, que elimina la necesidad del desplazamiento del Padrón de transferencia. En este nuevo sistema de calibración, la referencia pasa a ser un receptor de GPS (Global Position Sistem), que asume el papel de Padrón de Transferencia, al cual el padrón a ser calibrado es ininterruptamente comparado. El acceso y almacenamiento de los datos por el DSH/ON se realiza a través de un programa que controla remotamente la calibración en el laboratorio vía conexión por Internet. El presente trabajo compara el sistema actual con el aqui propuesto, todo el desarrollo y presenta el programa computacional, el montaje de un sistema completo de simulación práctica, incluso con acceso remoto víaa Internet, la recolección y tratamiento de datos y la presentación del procedimiento utilizado para llegar a los erros de medición del sistema. Se resalta la ventaja de un sistema de calibración automático, así como la no dependencia del transporte del Padrón de Transferencia para la realización de la calibración, evitando con esto su deterioración. En la conclusión de este trabajo se compara el error obtenido con el del procedimiento actualmente en práctica y a partir de esta comparación se realizan consideraciones respecto a la implementación del nuevo sistema y al uso del receptor de GPS como Padrón de Transferencia.
PIZZOCARO, MARCO. "Realization and characterization of optical frequency standards". Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2506152.
Pełny tekst źródłaLaw, Eugene L. "TELEMETRY RF SIGNAL BANDWIDTH; DEFINITIONS AND STANDARDS". International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608400.
Pełny tekst źródłaThis paper will present and compare several definitions of telemetry radio frequency (RF) signal bandwidth. Measured spectra for different signals will be presented. The bandwidths of these signals will then be determined and measurement methods will be discussed. This discussion will include the effects of spectrum analyzer resolution bandwidth, video bandwidth and detector type. Finally, a proposed spectral mask will be discussed. This spectral mask can be used to calculate the required attenuation for a given frequency offset from the center frequency. The required attenuation is a function of the the bit rate or maximum frequency of interest and the transmitter power. This spectral mask is proposed to be part of the next edition of the Telemetry Standards, Inter-Range Instrumentation Group (IRIG) Standard 106.
Hella, Mona Mostafa. "CMOS radio frequency power amplifiers for short-range wireless standards /". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486399160107527.
Pełny tekst źródłaSmowton, P. M. "The frequency stabilisation of laser diodes for industrial applications". Thesis, Cardiff University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319933.
Pełny tekst źródłaBREGOLIN, FILIPPO. "Yb-171 optical frequency standards towards the redefinition of the second". Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2754714.
Pełny tekst źródłaLangham, Conway David. "Cryogenic sapphire dielectric resonators as microwave frequency standards : development and performance". Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364164.
Pełny tekst źródłaSmith, J. E. "The effects of rogueing on the frequency of atypical winter wheat plants". Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383798.
Pełny tekst źródłaGrishina, Vera. "Blue laser for precision spectroscopy : toward optical frequency standard referenced to laser cooled calcium atoms". University of Western Australia. School of Physics, 2008. http://theses.library.uwa.edu.au/adt-WU2009.0046.
Pełny tekst źródłaTaylor, Paul. "Observation of an ultra-high Q resonance in a single ion of '1'7'2Yb'+". Thesis, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337596.
Pełny tekst źródłaSrinivasan, Rangakrishnan. "Design and implementation of a frequency synthesizer for an IEEE 802.15.4/Zigbee transceiver". Texas A&M University, 2003. http://hdl.handle.net/1969.1/5898.
Pełny tekst źródłaDawkins, Samuel T. "Sapphire room temperature optical frequency reference : design, construction and application". University of Western Australia. School of Physics, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0200.
Pełny tekst źródłaKoryl, Margaret Nolan. "The formal evaluation of Indiana school superintendents : frequency, practices, and procedures". Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1036818.
Pełny tekst źródłaDepartment of Education
Lamilla, Rubio Erick Abraham 1985. "Transmitindo padrões de frequência atômicos por redes de fibras ópticas=Transmitting atomic frequency standards in optical fiber networks". [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276939.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-28T03:18:42Z (GMT). No. of bitstreams: 1 LamillaRubio_ErickAbraham_M.pdf: 5773132 bytes, checksum: 33effe596fdd1deb74be96f588fc6150 (MD5) Previous issue date: 2015
Resumo: Neste trabalho foi feito um estudo experimental da transmissão de padrões de frequência atómicos através de uma rede de fibra optica. Até onde sabemos este tipo de transmissão foi realizada pela primeira vez no Brasil. Utilizamos uma conexão de fibra óptica entre o Instituto de Física Gleb Wataghin (IFGW) e a Faculdade de Engenharia Elétrica e Computação (FEEC) da UNICAMP, correspondendo a uma distância de aproximadamente 2 km, e um comprimento total de fibra de 18 km. Frequências de RF derivadas de padrões de frequência de Rubídio e de um receptor GPS foram transmitidas e caracterizadas através de medidas de frequência, particularmente por gráficos de variância de Allan, e medidas da fase
Abstract: In this experimental work, transmission of an atomic frequency standard through an optical fiber network has been implemented for first time in Brazil, to the best of our knowledge. We have used a fiber link between the Institute of Physics (IFGW) and the Department of Electrical Engineering inside the campus of the University of Campinas (UNICAMP) corresponding to 18 km fiber link (2km between buildings). Radio frequencies derived from a Rubidium standard and a GPS (Global Position system) receiver has been transmitted and characterized via phase and frequency measurements, particularly trough Allan deviation plots and phase measurements
Mestrado
Física
Mestre em Física
2013/15492-2
FAPESP
Trimble, William L. "High-resolution spectroscopy in ¹¹⁵In⁺ and prospects for an indium ion optical frequency reference /". Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/9661.
Pełny tekst źródłaSharma, Abhinav. "ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON THE HIGH-WALL STABILITY". UKnowledge, 2017. https://uknowledge.uky.edu/mng_etds/38.
Pełny tekst źródłaKalogrias, Christos. "Performance analysis of the IEEE 802.11A WLAN standard optimum and sub-optimum receiver in frequency-selective, slowly fading Nakagami channels with AWGN and pulsed noise jamming". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FKalogrias.pdf.
Pełny tekst źródłaThesis advisor(s): Clark Robertson. Includes bibliographical references (p. 143). Also available online.
Junior, Jair De Martin. "Sistema de laser de diodo de cavidade estendida para padrões de frequência". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-29052014-144230/.
Pełny tekst źródłaThis work has as main objective to develop a new source of diode laser compact and robust, beyond a new drive control for use in primary of time and frequency standards type cesium atom fountain and compact standards-based cold atoms. One of the requirements for the use of diode laser in primary of time and frequency standards are their stability in frequency and are very low spectral noise. Furthermore, given the embedded application, the laser must be extremely robust with respect to adverse conditions: mechanical, thermal and electrical. Both opto-mechanical part, as the electronic controls of the new laser were developed in this work. It is noteworthy that such a system, in its conception, is of great interest to many other types of applications such as spectroscopy of gases (LIDAR), references in other frequencies and experiments of atomic and molecular physics, which have high levels of demand with respect to spectral noise.
Silander, Isak. "Cavity enhanced optical sensing". Doctoral thesis, Umeå universitet, Institutionen för fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-110278.
Pełny tekst źródłaAhn, Hong Jo. "A frequency synthesizer for multi-standard wireless applications". Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1054488431.
Pełny tekst źródłaTitle from first page of PDF file. Document formatted into pages; contains xix, 148 p.: ill. Includes abstract and vita. Advisor: Mohammed Ismail. Includes bibliographical references (p. 144-148).
Podolan, Luděk. "Jednoúčelový stroj zajišťující lisování kanystrových nálevek". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221101.
Pełny tekst źródłaMILANI, GIANMARIA. "Realization of advanced 171Yb optical lattice frequency standard". Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2706635.
Pełny tekst źródłaDon, Wickramage Chathurika Pavithrani Kumari. "Information accountability in health information systems using process analytics". Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/205044/1/Chathurika_Don%20Wickramage_Thesis.pdf.
Pełny tekst źródłaEken, Yalcin Alper. "High frequency voltage controlled ring oscillators in standard CMOS". Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/8064.
Pełny tekst źródłaLuo, Changling 1980. "Fluctuating wind power penetration as limited by frequency standard". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83873.
Pełny tekst źródłaThe thesis also shows that fluctuating wind power penetration can be higher when there are filtering also in the wind farms. Wind turbines, with small inertias, driving constant speed squirrel cage induction generators are found to provide poor filtering. On the other hand, the fluctuating wind power penetration limit is increased to 18% in the case of wind turbines, with large inertias, driving variable-speed doubly-fed induction generators (DFIG) with decoupled P-Q control to implement optimal wind power acquisition.
Tang, Yiwu. "Adaptive phase locked loop in multi-standard frequency synthesizers /". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486401895208464.
Pełny tekst źródłaEken, Yalçin Alper. "High frequency voltage controlled ring oscillators in standard CMOS". Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-06072004-131133/unrestricted/eken%5Fyalcin%5Fa%5F200405%5Fphd.pdf.
Pełny tekst źródłaHomklintian, Monthol [Verfasser], i Meinhard [Akademischer Betreuer] Schilling. "Frequency Dependence of Primary Capacitance Standard in Audio Frequency Range / Monthol Homklintian ; Betreuer: Meinhard Schilling". Braunschweig : Technische Universität Braunschweig, 2012. http://d-nb.info/1175823945/34.
Pełny tekst źródłaCirineo, Tony, i Bob Troublefield. "STANDARD INTEROPERABLE DATALINK SYSTEM, ENGINEERING DEVELOPMENT MODEL". International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608398.
Pełny tekst źródłaThis paper describes an Engineering Development Model (EDM) for the Standard Interoperable Datalink System (SIDS). This EDM represents an attempt to design and build a programmable system that can be used to test and evaluate various aspects of a modern digital datalink. First, an investigation was started of commercial wireless components and standards that could be used to construct the SIDS datalink. This investigation lead to the construction of an engineering developmental model. This model presently consists of wire wrap and prototype circuits that implement many aspects of a modern digital datalink.
Gantenbein, Terry K. "Implementation of Multi-Frequency Modulation on an industry standard computer". Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27088.
Pełny tekst źródłaThis report discusses the theory, design, implementation and testing of a personal computer-based Multi-Frequency Modulation (MFM) packet communications system. Transmitter/receiver programs provide software drivers for D/A and A/D boards and perform symbol encoding, modulating, demodulating and decoding. The design and construction of a polarity coincidence correlator for receiver packet synchronization is presented. Experimental results show that the implemented MFM communication system conforms to theoretical analysis with acceptable bit error. Results also show the MFM can be uniquely adapted to a specific channel.
http://archive.org/details/implementationof00gant
Lieutenant, United States Navy
Tibbo, Maria S. "Optimization of a RF Single Ion Paul Trap for a 88Sr+ Ion Optical Clock Comparison". Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26254.
Pełny tekst źródłaKim, Hyungwook. "CMOS radio-frequency power amplifiers for multi-standard wireless communications". Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44786.
Pełny tekst źródłaSingh, Rahul. "Design Techniques for Frequency Reconfigurability in Multi-Standard RF Transceivers". Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1185.
Pełny tekst źródłaCha, Jeongwon. "A CMOS radio-frequency front-end for multi-standard wireless communications". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37250.
Pełny tekst źródłaStein, Björn [Verfasser]. "Contributions to a Yb+ single-ion optical frequency standard / Björn Stein". Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover, 2010. http://d-nb.info/1005408955/34.
Pełny tekst źródłaRAYMUNDO, ELIZABETH VILCANAUPA. "DEVELOPMENT OF A METROLOGICAL STANDARD LASER FREQUENCY REFERENCE AT 532 NM". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15143@1.
Pełny tekst źródłaFUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
Este trabalho faz parte do projeto do desenvolvimento do primeiro padrão de referência metrológica de frequência em torno de 532 nm no Brasil, para a realização prática da definição do metro. A pesquisa foi desenvolvida no Laboratório de Interferometria (Laint) da Divisão de Metrologia Óptica do Inmetro, em convenio com o Programa de Pós-Graduação em Metrologia para Qualidade Industrial da PUC-Rio. No âmbito deste projeto, a realização de uma nova referência em comprimento/freqüência é feita mediante a estabilização de um laser comercial Nd:YAG emitindo uma radiação em torno de 532 nm. A estabilização é realizada numa componente hiperfina de uma transição do iodo molecular (127)I(2), segundo as recomendações do Comitê Internacional de Pesos e Medidas (CIPM- Comité International des Poids et Mesures). O vapor de iodo é contido numa célula externa de absorção resfriada à uma temperatura entre -10 °C e -15 °C. Neste trabalho são apresentadas as seguintes etapas do projeto: Montagem opto-mecânica do sistema e alinhamentos ópticos. Detecção e registro dos sinais de absorção com célula à temperatura ambiente correspondendo às transições do iodo em torno de 532 nm.Caracterização do laser Nd:YAG ou seja determinação da freqüência de emissão laser em função da temperatura TLC do cristal laser, utilizando para este fim um medidor de comprimento de onda (wavemeter). Medições preliminares do sistema de resfriamento e de regulação da temperatura da célula de iodo por meio de um dispositivo termoelétrico Peltier. O controle automático duma temperatura teste de -13°C é realizado via programação LabView.
This work is part of the project for development of the first metrology reference for frequency standard around 532 nm in Brazil for the practical realization of the definition of the meter. The study was conducted at the Laboratory Interferometry (Laint) Inmetro, through an agreement with the Posgraduation Program in Metrology for Quality Industrial, PUC-Rio. In the scope of this project, the realization of a new reference length/frequency is made by the stabilization of a commercial laser Nd:YAG emitting radiation around 532 nm. The stabilization is performed on a component of a hyperfine transition of molecular iodine (127)I(2), according to the recommendations of the International Committee of Weights and Measures (CIPM- Comité International des Poids et Mesures).The iodine vapor is contained in an external absorption cell cooled to a temperature between -10°C and -15°C. This work presents the following stages of the project: Opto-mechanical assembly of the system and optical alignments. Detection and recording of signals with absorption cell at room temperature corresponding to iodine transitions around 532 nm. Characterization of Nd: YAG laser that is determining the frequency of the laser emission as a function of laser crystal temperature TLC, using for this purpose a meter wavelength (wavemeter). Preliminary measurements of the cooling system and temperature regulation of the iodine cell by a Peltier thermoelectric device. The automatic control of a test temperature of -13°C is achieved via LabView programming.
Kim, Hyung Joon. "Multi-standard radio transceiver architectures and radio frequency front-end design". Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1110399471.
Pełny tekst źródłaTitle from first page of PDF file. Document formatted into pages; contains xv, 128 p.; also includes graphics (some col.). Includes bibliographical references (p. 125-128). Available online via OhioLINK's ETD Center
SECCO, MARCELLO. "Desenvolvimento de dispositivo movimentador automatizado de amostras com vista à aplicação em medidas de radioisótopos que possuem curto tempo de meia-vida". reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26619.
Pełny tekst źródłaMade available in DSpace on 2016-08-26T12:45:07Z (GMT). No. of bitstreams: 0
Medidas de espectroscopia gama de alta resolução têm diversas aplicações. Aplicações envolvendo medidas de radioisótopos de meia-vida curta podem apresentar problemas de baixa precisão nas contagens quando a fonte radioativa está distante do detector e de perda de acurácia por efeitos de tempo morto e empilhamento de pulsos em situação de altas taxas de contagens. Um modo de minimizar esses problemas é alterando a posição da fonte radioativa durante o processo de medição, aproximando-a do detector conforme sua atividade diminui e assim maximizando o número de contagens medidas. Neste trabalho, foi desenvolvido o Movimentador de Amostras Radioativas Automatizado (MARA), um aparato de baixo custo, feito com materiais de baixo número atômico e leve, projetado e construído para auxiliar nas medidas de espectroscopia gama, capaz de controlar a distância entre a fonte e o detector, permitindo inclusive que ocorra alteração dessa distância durante o processo de medição. Por ser automatizado ele otimiza o tempo do operador, que tem total liberdade para criar suas rotinas de medidas no dispositivo, além de evitar que o mesmo tome uma parcela da dose radioativa. Foi também feita uma interface que permite controle do MARA e a programação do sistema de aquisição de dados. Foram realizados testes para otimização da operação do sistema MARA e foi verificada a segurança de operação do MARA, não apresentando nenhuma falha durante seus testes. Foi aplicado o teste de repetitividade, por meio de medições com uma fonte calibrada de 60Co, e verificou-se que o sistema de movimentação de prateleiras automatizado reproduziu os resultados do sistema estático com confiabilidade de 95%.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
Chen, Xinhua. "Design of a highly-integrated frequency synthesizer for multi-standard mobile communications /". Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17292.
Pełny tekst źródłaGirkin, J. M. "Development of a tellurium frequency standard for laser spectroscopy of atomic hydrogen". Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382167.
Pełny tekst źródłaJohnson, Steven. "Narrow linewidth lasers for use with neutral strontium as a frequency standard". Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4576/.
Pełny tekst źródłaGarkusha, Sergey. "Analysis the Results of Frequency Planning in Mesh Networking Standard IEEE 802.11". Thesis, Modern Problems of Radio Engineering, Telecommunications and Computer Science. Proceedings of the international Conference TCSET’2012, 2012. http://dspace.uccu.org.ua/handle/123456789/870.
Pełny tekst źródłaHill, Ian Robert. "Development of an apparatus for a strontium optical lattice optical frequency standard". Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9822.
Pełny tekst źródłaAbd, Halim Hasliza. "Restricted Verb Phrase Collocations in Standard and Learner Malaysian English". Thesis, University of Canterbury. Linguistics, 2014. http://hdl.handle.net/10092/10362.
Pełny tekst źródłaPapageorgiou, Nikolaos A. "Development of RF front end prototype compliant with the 802.11a standard for wireless applications". Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04072004-180131/unrestricted/papageorgiou%5Fnikolaos%5Fa%5F200312%5Fms.pdf.
Pełny tekst źródłaHuang, Wenxiang. "A broadband RF CMOS frond-end for multi-standard wireless communication". Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1170882877.
Pełny tekst źródłaKao, Chi-Han. "Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slow, ricean fading channels". Thesis, Monterey California. Naval Postgraduate School, 2002. http://hdl.handle.net/10945/5020.
Pełny tekst źródłaWith the rapidly growing demand for more reliable and higher data rate wireless communications, the Institute of the Electrical and Electronics Engineers (IEEE) 802.11 working group approved a standard for 5 GHz band, wireless local area networks (WLAN) in 1999. This standard, IEEE 802.11a, supports data rates from 6 up to 54 Mbps, and uses orthogonal frequency division multiplexing (OFDM) for transmission in indoor wireless environments. This thesis examines the performance of the IEEE 802.11a standard for different combinations of sub-carrier modulation type and code rate and determines the signal-to-noise ratio required to obtain a probability of bit error b P of 10-5. The channel is modeled as a frequency-selective, slow, Ricean fading channel with additive white Gaussian noise (AWGN). Contrary to expectations, for the combinations of sub-carrier modulation type and code rate utilized by the IEEE 802.11a standard, some of the higher data rate combinations outperform some of the lower data rate combinations. On the other hand, the results also show significant coding gain when applying convolutional coding with Viterbi decoding, and hence highlight the importance of forward error correction (FEC) coding to the performance of wireless communications systems.
Kao, Chi-han. "Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slow, ricean fading channels /". Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FKao.pdf.
Pełny tekst źródłaThesis advisor(s): R. Clark Robertson, Roberto Cristi. Includes bibliographical references (p. 93-94). Also available online.
Muhammad, Wasim. "CMOS LNA Design for Multi-Standard Applications". Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7841.
Pełny tekst źródłaThis thesis discusses design of narrowband low noise amplifiers for multi¬standard applications. The target of this work is to design a low noise ampli¬fier(LNA) for DCS1800 and Bluetooth standard frequency bands. Various designs for narrowband multi-standard LNAs have been studied and a new design for tunable multi-standard LNA has been presented and designed using accumulation mode MOS varactors.
As this design includes on-chip spiral inductors, the design, modelling and layout of on-chip inductors have been discussed briefly. The tool used for this purpose is ASITIC.
Also ESD protection techniques for RF circuits and their effect on LNA per¬formance has been discussed.
Finally fully differential LNA has been designed in O.35um AMS thick metal CMOS process using Cadence SpectreRF. The design also includes ESD pro¬tection at the input of LNA.
Sastrawan, Wayan Jarrah Scheeres. "Novel precision control techniques in a trapped Yb+ ion implementation". Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13534.
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