Thèses sur le sujet « SPECTRUM APPLICATIONS »
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Bess, Philip K. « Spread spectrum applications in unmanned aerial vehicles ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA281035.
Texte intégralLähetkangas, K. (Kalle). « Special applications and spectrum sharing with LSA ». Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526223940.
Texte intégralTiivistelmä Kaupalliset long-term evolution (LTE) -verkot tarjoavat nopean, edullisen ja alueellisesti kattavan pääsyn Internettiin sekä laajaan valikoimaan sovelluksia. Samaan aikaan turvallisuustoimijat (public safety (PS) -toimijat) käyttävät vanhanaikaisia äänen sekä vaatimattoman datayhteyden tarjoavia verkkoja. LTE-verkot ovat kuitenkin äskettäin standardoitu tarjoamaan valmiudet myös toimintokriittiseen kommunikointiin. Toisaalta, kaupalliset LTE-verkot eivät vielä tarjoa esimerkiksi tarvittavaa alueellista kattavuutta PS-käyttäjille. Lisäksi, kaupalliset verkot saattavat olla epäkunnossa kriittisissä tilanteissa. Tämän vuoksi PS-toimijat tarvitsevat omia nopeasti pystytettäviä LTE-verkkoja tukemaan nykyaikaista viestintäänsä. Opinnäytetyössä tutkitaan näiden nopeasti pystytettävien LTE-verkkojen käyttöä kaupallisten LTE-verkkojen kanssa. Keskeiset tehtävät ovat eri verkkojen PS-toimijoiden saumaton yhdistäminen sekä verkkojen taajuusjaon toteuttaminen. Tämä opinnäytetyö tarjoaa käytännön ratkaisuja verkkojen yhteentoimivuuden takaamiseksi ja radiotaajuuksien jakoratkaisuja lisensoidun jaetun käyttöoikeuden licensed shared access (LSA) -metodin avulla. Vaikka LSA:n käsite on jo pitkälle kehitetty, sitä ei ole tutkittu perusteellisesti PS-toimijoiden näkökulmasta ottaen huomioon heidän erityisvaatimuksensa. Tässä työssä syvennytään näiltä osin LSA järjestelmään yhtenä vaihtoehtona taajuuksien saamiseksi nopeasti pystytettäville verkoille. Lisäksi työssä kehitetään robusti LSA-pohjainen taajuuksien jakamisjärjestelmä nopeasti pystytettäville verkoille tilanteissa, joissa kaupalliset verkot ovat riittämättömät. Huomaa, että PS-toimijoiden on pystyttävä hyödyntämään taajuuksia myös silloin, kun LSA-järjestelmän kaikki osat eivät ole käytettävissä ja kun kaupallinen LTE järjestelmä on alhaalla. Tätä varten opinnäytetyössä kehitetään LSA:ta täydentävä havainnointimenetelmä, jolla taataan taajuustiedot vapaista taajuuksista nopeasti pystytettäville verkoille, sekä näytetään, miten PS-toimijat voivat hyödyntää LSA:ta toissijaisen taajuuslisenssin avulla. Tämä on hyvä vaihtoehto radiospektrin varaamiseksi kokonaan. Työ kokoaa puuttuvia osia olemassa oleviin menetelmiin, jotta voidaan varmistaa kaupallisten verkkojen toimivuus PS-käyttäjille yhdessä niitä tukevien nopeasti pystytettävien verkkojen kanssa taajuuksien käytön ja sovelluspalvelujen osalta
Petrini, Valeria <1984>. « Cognitive radio applications for enhanced spectrum efficiency ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5493/1/Petrini_Valeria_tesi.pdf.
Texte intégralPetrini, Valeria <1984>. « Cognitive radio applications for enhanced spectrum efficiency ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5493/.
Texte intégralMariani, Andrea <1984>. « Spectrum Sensing Algorithms for Cognitive Radio Applications ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5615/2/Mariani_Andrea_SpectrumSensingforCognitiveRadio.pdf.
Texte intégralMariani, Andrea <1984>. « Spectrum Sensing Algorithms for Cognitive Radio Applications ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5615/.
Texte intégralJiang, Chen. « Applications of frequency hopping systems ». Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B31241852.
Texte intégral江晨 et Chen Jiang. « Applications of frequency hopping systems ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31241852.
Texte intégralJiang, Chen. « Applications of frequency hopping systems ». Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B22277729.
Texte intégralPapadimitriou, Panayiotis D. « Code design based on metric-spectrum and applications ». Texas A&M University, 2004. http://hdl.handle.net/1969.1/1365.
Texte intégralStreet, Andrew M. « Spread spectrum techniques for multiplexing and ranging applications ». Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259828.
Texte intégralSun, Shaobo. « Applications of spectrum slicing in optical access networks ». Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/34617/.
Texte intégralSilva, Agampodige Emmanuel Diyanth Sirimal. « Theoretical advancements and applications in singular spectrum analysis ». Thesis, Bournemouth University, 2016. http://eprints.bournemouth.ac.uk/25043/.
Texte intégralBais, Viraj Kumar. « Simulation of multistage detector for spread-spectrum applications ». Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12232009-020220/.
Texte intégralWalsh, Penelope Jane, et n/a. « Modelling and spectroscopy of polypyridyl and porphyrin complexes for electroluminescence and solar cell applications ». University of Otago. Department of Chemistry, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070927.151236.
Texte intégralNelson, Paul Redfield. « Applications of analytical collisional mass spectrometry ». Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/27053.
Texte intégralPark, Jongmin. « CMOS analog spectrum processing techniques for cognitive radio applications ». Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37230.
Texte intégralLinares, Irving. « Theory and applications of the estimated spectrum adaptive postfilter ». Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/14962.
Texte intégralHarvey, Pierre Dominique. « Applications of vibrational spectroscopy and NMR spin-lattice relaxation time measurements to organometallic and organic molecular crystals ». Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=73986.
Texte intégralAdibnejad, Mohammad. « Rotors moléculaires fluorescents : synthèse, étude photophysique, applications ». Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL053N.
Texte intégralMoalusi, Matlhodi Salamina. « Selected applications of sequential injection analysis ». Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-08212007-155923.
Texte intégralBlaquière-Nowlan, Anne J. « MV-spectrum-based applications for vibration analysis of magnetic bearings ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29972.pdf.
Texte intégralAly, Omar Abdel-Gaber Mohamed. « Enhancing the performance of spread spectrum techniques in different applications ». [S.l.] : [s.n.], 2006. http://diglib.uni-magdeburg.de/Dissertationen/2006/omaaly.htm.
Texte intégralRusso, Juan Manuel. « Holographic Grating-over-Lens Dispersive Spectrum Splitting for Photovoltaic Applications ». Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/347092.
Texte intégralXing, Jie, et 邢杰. « Applications of FT-Raman spectroscopy in starch analysis ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31243824.
Texte intégralXing, Jie. « Applications of FT-Raman spectroscopy in starch analysis / ». Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B24534341.
Texte intégralPerkins, Jonathan Hale. « Some applications of linear algebra to quantitative spectroscopy / ». Thesis, Connect to this title online ; UW restricted, 1988. http://hdl.handle.net/1773/11534.
Texte intégralLin, Huang-De Hennessy. « Parametric projection pursuits for dimensionality reduction of hyperspectral signals in target recognition applications ». Master's thesis, Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-12162003-202048.
Texte intégralRittenhouse, Michelle L. « Properties and Recent Applications in Spectral Graph Theory ». VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/1126.
Texte intégralDonelan, Helen Margaret. « The Properties and Applications of Structured Codes to Spread Spectrum Communication Systems ». Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486157.
Texte intégralLee, Bong-Woon. « Applications of signal processing techniques in direct-sequence spread spectrum communication systems ». Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1173208101.
Texte intégralLohmiller, Peter [Verfasser]. « Spectrum Sensing RF Front-End Module for Cognitive Radio Applications / Peter Lohmiller ». Berlin : epubli, 2017. http://d-nb.info/1123330557/34.
Texte intégralIbrahim, Ibrahim Ismail. « Design and performance of multiple access, spread spectrum systems for telemetry applications ». Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329617.
Texte intégralJaffke, Patrick John. « Corrections to and Applications of the Antineutrino Spectrum Generated by Nuclear Reactors ». Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/80031.
Texte intégralPh. D.
Letzelter, Corinne. « Spectroscopie et photodissociation de la molecule de co : applications astrophysiques ». Paris 6, 1987. http://www.theses.fr/1987PA066182.
Texte intégralVallina-Rodriguez, Narseo. « The hidden costs of mobile applications : a cross-layer analysis of energy and spectrum waste of mobile applications ». Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648525.
Texte intégralCerocchi, Filippo. « Dynamical and Spectral applications of Gromov-Hausdorff Theory ». Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENM077/document.
Texte intégralThis Ph.D. Thesis is divided into two parts. In the first part we present the barycenter method, a technique which has been introduced by G. Besson, G. Courtois and S. Gallot in 1995, in order to solve the Minimal Entropy conjecture. In Chapter 1 we are interested in the more recent developments of this method, more precisely in the recent extension of the method to the case of manifolds having sectional curvature of variable sign. In Chapters 2 and 3 we shall present some new results whose proofs make use of the barycenter method. The Conjugacy Rigidity problem is the theme of Chapter 2. First we show a general result which provide a comparison between the large scale geometry of the Riemannian universal coverings of two compact manifolds whose geodesic flows are conjugates. Then we shall show how we can apply the latter result and the barycenter method in curvature of variable sign in order to give a new proof of the conjugacy rigidity of flat manifolds. In Chapter 3 we shall give a proof of a spectra comparison theorem for a compact Riemannian manifold which admits a Gromov-Hausdorff-approximation of non zero absolute degree on a fixed compact manifold (X,g') and which has volume almost smaller than the one of the reference manifold. The proof relies on the barycenter method in curvature of variable sign and on iterated Sobolev inequalities. We underline that it is an approximation result (and not just a convergence result) and that no curvature assumptions are made or inferred on (Y,g). The second part of the Thesis consists of a single chapter. In this chapter we prove a Margulis Lemma without curvature assumptions for Riemannian manifolds having decomposable 2-torsionless fundamental group. We shall give also a proof of a universal lower bound for the homotopy systole of compact Riemannian manifolds having bounded volume entropy and diameter, and decomposable torsionless fundamental group. As a consequence of the latter result we shall deduce a Precompactness and Finiteness theorem and a Volume estimate without curvature assumptions
Rohatgi, Anil. « Implementation and Applications of an Anti-Collision Differential-Offset Spread Spectrum RFID System ». Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13946.
Texte intégralYoon, Seungil. « Cross-layer dynamic spectrum management framework for the coexistence of white space applications ». Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44787.
Texte intégralAndrews, Derek Sayre. « Novel applications of surface based morphometry and pattern classification in autism spectrum disorders ». Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/novel-applications-of-surface-based-morphometry-and-pattern-classification-in-autism-spectrum-disorders(e4ce8d68-12ee-42a6-928c-d6393c9489bd).html.
Texte intégralAndrenacci, Stefano. « De Bruijn sequences in spread spectrum systems : problems and performance in vehicular applications ». Doctoral thesis, Università Politecnica delle Marche, 2012. http://hdl.handle.net/11566/242316.
Texte intégralThis thesis deals with the analysis about a possible utilization of a particular set of sequences, the so-called de Bruijn sequences, in a Direct Sequence Spread Spectrum (DSSS) vehicular radar system. Compared with other spreading codes adopted in DSSS systems, the greater the span of the set is, the more the number of de Bruijn sequences exponentially increases and theoretically permits to assign each radar a different generated sequence, as a specific key. By this way it is possible to develop a self-consistent radar system, which is able to work without any infrastructure required to assign sequences, as it happens in the case conventional spreading codes, like Gold codes or Kasami codes, are adopted. Due to their both favourable auto- and cross-correlation properties they are particularly indicated for automotive systems in which there are the needs of detecting accurately a target and performing in a multi-user radar environment. Considering their good correlation properties and their huge number, de Bruijn sequences could be used not only in vehicular radar systems but also in other Spread Spectrum and so, they are evaluated in various scenarios like downlink and uplink channel of DS-CDMA systems. In fact, in standard version de Bruijn sequences, if accurately selected, have the property of orthogonality and so they are tested in a downlink channel of a DS-CDMA system. In addition, from de Bruijn sequences another particular set of sequences, the so-called modified de Bruijn sequences, can be derived. These sequences show better performance in terms of cross-correlation properties and could be used in uplink channel of DS-CDMA system. In order to verify the performance in a real test-bed, a preliminary implementation on Software Defined Radios is also developed. Finally they are adopted and compared in simulated multiuser DSSS radar scenarios. The analysis done and the performance results obtained suggest to evolve this radar solution to a cognitive radar approach using computer vision systems as external aid sensor which can outperform actual solutions.
Li, He. « Privacy and Authentication in Emerging Network Applications ». Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101786.
Texte intégralDoctor of Philosophy
The privacy-preserving and message authentication issues of some network applications are distinctive from common internet security due to different attack models and possibly constrained resources, and these security and privacy concerns cannot be addressed by applying existing internet security solutions straightforwardly. For example, in a centralized dynamic spectrum access (DSA) system, the spectrum resource licensees called incumbent users (IUs), have strong operational privacy requirements for the DSA service provider called spectrum access system (SAS), and hence SAS is required to perform spectrum computation without knowing IUs' operational information. This means SAS can at most be considered as a semi-trusted party which is honest but curious, and common anonymization and end-to-end encryption cannot address this issue, and dedicated solutions are required. Another example is that in an intra-vehicle Controller Area Network (CAN), the transmitter can only embed 64 bits of message and its authentication tag into on message frame, which makes it difficult to achieve message authentication in real-time with sufficient cryptographic strength. We addressed the privacy issue of DSA systems by proposing novel schemes incorporating efficient cryptographic primitives and various privacy-preserving techniques, achieving a greatly higher efficiency or stronger privacy-preserving level. We addressed the lightweight authentication issue of resource-constrained networks by employing the novel concept of security accumulation and message speculation, achieving high cryptographic strength, low communication overhead, and probable low latency.
Bhatnagar, Mohit. « Multiplexing of interferometric fiber optic sensors for smart structure applications using spread spectrum techniques ». Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12052009-020246/.
Texte intégralSharakhov, Nikita Igorevich. « Web-Based Data Visualization with 3D Portrayals for Communications Applications ». Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50420.
Texte intégralMaster of Science
Sephus, Nashlie H. « A framework for exploiting modulation spectral features in music data mining and other applications ». Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52243.
Texte intégralShan, Peijun. « Time-Varying Autoregressive Model Based Signal Processing with Applications to Interference Rejection in Spread Spectrum Communications ». Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/39006.
Texte intégralPh. D.
Craymer, Michael R. « The least squares spectrum, its inverse transform and autocorrelation function, theory and some applications in geodesy ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0025/NQ33898.pdf.
Texte intégralGerstein, Rachel. « THE LONG-TERM COURSE OF BIPOLAR SPECTRUM DISORDER : APPLICATIONS OF THE BEHAVIORAL APPROACH SYSTEM (BAS) MODEL ». Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/73971.
Texte intégralPh.D.
In this study, I tested predictions of the Behavioral Approach System (BAS) model as applied to the course of bipolar spectrum disorders. In this model, when a vulnerable individual experiences a BAS activation-relevant event, the weak regulatory strength of the BAS interacts with pre-event BAS state and is likely to lead to hypomania/mania. In contrast, when a vulnerable individual experiences a BAS deactivation-relevant event, the weak regulatory strength of the BAS interacts with pre- event BAS state and is likely to lead to depression. A secondary goal of this study involved comparing the BAS model to the cognitive-vulnerability stress model of bipolar disorder. Toward this end, data from a sample of 217 individuals (112 individuals with a diagnosis in the bipolar spectrum and 105 demographically similar, normal controls) participating in the Longitudinal Investigation of Bipolar Spectrum Disorders (LIBS) Project, a two-site prospective examination of the role of BAS, cognitive styles, and life events in the course of bipolar disorders among college students, were analyzed. The results of this study suggest that there is some support for both the BAS model and the cognitive-vulnerability stress model. Specifically, BAS-relevant cognitive styles, in interaction with congruent positive life events, predicted hypomanic episodes. There was less support for either model in the prediction of depression. There was some support for BAS sensitivity and BAS-relevant events each predicting the course of bipolar disorder. However, there was no support for the interaction of BAS sensitivity and BAS-relevant events predicting the type and number of mood episodes. As such, this study found more support for a BAS-related cognitive vulnerability-stress model, as compared to the "pure" BAS model, as applied to bipolar spectrum disorders. Following a review of the results, strengths and limitations, as well as clinical implications and potential future research directions are discussed.
Temple University--Theses
Mukherjee, Sayak. « Applications of Field Theory to Reaction Diffusion Models and Driven Diffusive Systems ». Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/39293.
Texte intégralPh. D.
Alkanjo, Hasan. « Spectre étendu des opérateurs et applications ». Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10271/document.
Texte intégralThis thesis is based on a relatively new spectral notion, called extended spectrum of operators. In the first part, we provide general properties of extended spectrum of an operator in some special cases, such as the case of finite dimension and the case of invertible operator. We focused in the second part on characterizing the extended spectrum of truncated shift operator Su. In particular, we give a complete description of the extended eigenvectors associated to each extended eigenvalue of Sb, where b is a Blaschke product. In the third part, we describe the extended spectrum and the extended eigenvectors of a very important class of operators , that is the normal operators. We first start by describing these last sets for the product of a positive and a self-adjoint operator which are both injective. After, we use the Fuglede-Putnam theorem to describe the same sets for normal operators, in terms of their spectral measure. In the last part, we apply our results from the last three parts on concrete examples. In particular, we address the problem of extended eigenvectors of operators defined in a finite dimension space. Next, we show the existence of a quasinilpotent compact operator whose extended spectrum is reduced to {1}. Finally, we study two Cesaro operators which are very important in applications