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Teses / dissertações sobre o tema "Radar theory"

Autor: Grafiati

Publicado: 25 de julho de 2024

Última modificação: 31 de julho de 2025

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1

Saddington, P. "Adaptive resonance theory : theory and application to synthetic aperture radar." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/843249/.

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Artificial Neural Networks are massively parallel systems that are constructed from many simple processing elements called neurons. The neurons are connected via weights. This structure is inspired by the current understanding of how biological networks function. Since the 1980s, research into this field has exploded into the hive of activity that currently surrounds neural networks and intelligent systems. The work in this thesis is concerned with one particular artificial neural network: Adaptive Resonance Theory (ART). It is an unsupervised neural network that attempts to solve the stabilit

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2

Enders, Robert H. "Laser radar tracking theory : track-while-image operation." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14424.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.<br>Vita.<br>Includes bibliographical references.<br>Supported by U.S. Army Research Office. DAAL03-87-K-0117<br>by Robert Hay Enders.<br>Ph.D.

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3

Kenny, Owen Patrick. "Theory of radar imaging using time-frequency distribution." Thesis, Queensland University of Technology, 1992. https://eprints.qut.edu.au/36211/6/36211_Digitised%20Thesis.pdf.

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The concept of radar was developed for the estimation of the distance (range) and velocity of a target from a receiver. The distance measurement is obtained by measuring the time taken for the transmitted signal to propagate to the target and return to the receiver. The target's velocity is determined by measuring the Doppler induced frequency shift of the returned signal caused by the rate of change of the time- delay from the target. As researchers further developed conventional radar systems it become apparent that additional information was contained in the backscattered signal and that

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4

Park, C. K. "Two dimensional interpolation for radar raster scan display." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357191.

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5

Yoho, Peter K. "Satellite scatterometers : calibration using a ground station and statistical measurement theory /." Diss., CLICK HERE for online access, 2003. http://contentdm.lib.byu.edu/ETD/image/etd306.pdf.

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6

Kasebzadeh, Pedram. "Clutter Detection in Radar Applications." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171547.

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Radars have been used for detection purposes in safety applications (i.e., blind spot detection radar in cars) extensively. The existing detection methods, however, are not flawless. So far, the main focus of these methods is on detecting an object based on its reflectiveness. In this thesis, the limitation of conventional methods are addressed, and alternative approaches are proposed. The main objective is to model/identify the noise with statistical and machine learning approaches as an alternative to conventional methods that focus on the object. The second objective is to improve the time

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7

Lindsay, K. W. "Secondary radar, collision avoidance and ship-to-ship communication." Thesis, Liverpool John Moores University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332121.

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8

Bachmann, Darren John. "A game theoretic analysis of adaptive radar jamming /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002983.

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9

Smyth, Timothy James. "Precipitation measurements in convective storms using multiparameter radar." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363714.

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10

Simms, Melissa Jean. "A Novel Approach to Target Scene Detection and Identification: Theory & Experiments." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1470327337.

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11

Jameson, Brian Douglas. "A NOVEL MULTI-FUNCTIONAL SOFTWARE-DEFINED RADAR: THEORY & EXPERIMENTS." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375821039.

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12

Elgayar, Saad M. "From Theory to Practice: Randomly Sampled Arrays for Passive Radar." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503304471335023.

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13

Xu, Cuichun. "Statistical processing on radar, sonar, and optical signals /." View online ; access limited to URI, 2008. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3328735.

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14

Gung, Tza-Jing. "Radar range profile simulation of isolated trees with radiative transfer theory." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36572.

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15

Yeang, Chen-Pang. "Target identification theory for synthetic aperture radar images using physics-based signatures." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80603.

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16

Vestberg, Marcus Erik. "A compatibilist computational theory of mind." Thesis, Oxford Brookes University, 2017. https://radar.brookes.ac.uk/radar/items/bf378e8f-abc3-47cd-9004-4efab56970c1/1/.

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This thesis defends the idea that the mind is essentially computational, a position that has in recent decades come under attack by theories that focus on bodily action and that view the mind as a product of interaction with the world and not as a set of secluded processes in the brain. The most prominent of these is the contemporary criticism coming from enactivism, a theory that argues that cognition is born not from internal processes but from dynamic interactions between brain, body and world. The radical version of enactivism in particular seeks to reject the idea of representational cont

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17

Cirineo, Tony. "Doppler Video Signal Conditioning, Theory of Operation." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/611417.

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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>This paper describes some of the signal conditioning and processing circuits that were developed to reconstruct the doppler video signal from a radar receiver under test. The reconstructed doppler video signal is then digitized and put into a telemetry frame for transmission to a ground receiving station.

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18

Dalevi, Mathias. "S-Band Antenna Array." Thesis, Uppsala University, Astronomy and Space Physics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126302.

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<p><strong>This report presents concepts for a planar active electronically scanned antenna(AESA). The goal of the project was to devlop a low-weight, low profile, thin, S-band antenna with wide-scan angle capabilities. In the final concept the service aspects of the T/R-modules was also taken into acount in order to allow easy and fast replacements of these components. The antenna was designed and optimised using the commercial software Ansoft HFSS. A prototype of the antenna was constructed and later measured and verified. The final concept is a 2m×2m antenna with an estimated weight of arou

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19

McElwain, Thomas P. "L-estimators used in CFAR detection." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/29199.

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20

Cammenga, Zachary Andrew. "High Range Resolution Micro-Doppler Radar Theory and Its Application to Human Gait Classification." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483438572645656.

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21

Williams, Mary Moulton. "Radar cross-section data encoding based on parametric spectral estimation techniques." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063346/.

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22

Lee, Yong Joo. "The SME filter approach to multiple target tracking with false and missing measurements." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/13756.

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23

Dixon, Jason Herbert. "Pattern-theoretic automatic target recognition for infrared and laser radar data." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54404.

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Pattern theory, a mathematical framework for representing knowledge of complex patterns developed by applied mathematician Ulf Grenander, has been shown to have potential uses in automatic target recognition (ATR). Prior research performed in the mid-1990s at Washington University in St. Louis resulted in ATR algorithms based on concepts in pattern theory for forward-looking infrared (FLIR) and laser radar (LADAR) imagery, but additional work was needed to create algorithms that could be implemented in real ATR systems. This was due to performance barriers and a lack of calibration between ta

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24

Matzner, Shari. "Model-Based Information Extraction From Synthetic Aperture Radar Signals." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/248.

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Synthetic aperture radar (SAR) is a remote sensing technology for imaging areas of the earth's surface. SAR has been successfully used for monitoring characteristics of the natural environment such as land cover type and tree density. With the advent of higher resolution sensors, it is now theoretically possible to extract information about individual structures such as buildings from SAR imagery. This information could be used for disaster response and security-related intelligence. SAR has an advantage over other remote sensing technologies for these applications because SAR data can be coll

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25

Sheppard, Louise. "How coaching supervisees help and hinder their supervision : a Grounded Theory study." Thesis, Oxford Brookes University, 2016. https://radar.brookes.ac.uk/radar/items/b622add5-7b08-44a1-be82-87a1ebbcf4be/1/.

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Coaching supervision is an emerging profession with a need of developing its knowledge base. However, there is a lack of understanding of the supervision process from the coaching supervisees’ perspective, a crucial element without which issues and debates about coaching supervision are incomplete. Furthermore, although most of the professional bodies that represent coaches in the UK require coaches to have supervision, they do not provide clear guidelines on how supervisee’s can use supervision effectively. This study aims to fill that gap, providing empirical evidence on how supervisees can

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26

Sealey, Roger Derek. "An analysis of the impact of privatisation and deregulation on the UK bus and coach and port industries." Thesis, Oxford Brookes University, 2003. http://radar.brookes.ac.uk/radar/items/9aa104be-58e9-6050-7ef8-8485338233f6/1.

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The main objectives of this dissertation are: (1) To analyse the pre and post privatisation and deregulation performance of two United Kingdom industries from the transport sector. (2) To analyse the earning and employment in these industries prior to deregulation and/or privatisation, and to examine what has happened to them after these changes. (3) To investigate any changes that have occurred in trade union density in these industries compared with what has happened in the rest of the economy. (4) To see if there was any evidence of rent sharing prior to privatisation and deregulation. If i

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27

Matricardi, Elisabetta. "Performance Analysis of a Radar System Based on 5G Signals." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Poiché lo spettro sta diventando una risorsa sempre più scarsa, l'idea di riutilizzarlo per più di un'applicazione è interessante, in quanto può evitare il sottoutilizzo di risorse spettrali altrimenti allocate in modo permanente. Negli ultimi anni è stata introdotta una alternativa ai segnali radar, che consiste in forme d'onda OFDM generate digitalmente. Questa tesi ha come obiettivo quello di investigare le prestazioni di un segnale di comunicazione, il 5G NR, quando usato per scopi di sensing. Un sistema radar e un algoritmo di processing basato sull'elaborazione radar OFDM nel dominio del

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28

Mariussen, A. "A grounded theory of affiliate marketing performance measurement in the tourism and hospitality context." Thesis, Oxford Brookes University, 2012. http://radar.brookes.ac.uk/radar/items/907e34ff-7d07-51ea-18af-cdda2678bba4/1.

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Although the measurement of offline and online marketing is extensively researched, the area of online performance measurement still presents a number of unaddressed gaps, such as fragmented research and predominance of practitioner-driven measurement approaches. With a focus on affiliate marketing in tourism and hospitality, this thesis addressed these gaps and evaluates the effectiveness of practitioner-led online performance assessment. More precisely, the study explores a potential shift in affiliate marketing measurement practices, and develops a theory of affiliate marketing performances

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29

Tameh, Eustace K. "The development and evaluation of a deterministic mixed cell propagation model based on radar cross-section theory." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364890.

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30

Khabou, Mohamed Ali. "Improving shared weight neural networks generalization using regularization theory and entropy maximization /." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9953870.

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31

Kellett, Daniel. "Random Sequence Encoding with OFDM for Covert Communication and Signal Reuse for LPI/LPD Radar: Theory & Experiments." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1501120348908255.

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32

Tovey, Philip Noel. "The theory and practice of extended communion, with particular reference to parishes within the Anglican Diocese of Oxford." Thesis, Oxford Brookes University, 2006. https://radar.brookes.ac.uk/radar/items/2099a75e-9861-408b-9329-e2bac8986503/1/.

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The Roman Catholic Church, the Methodist Church, and the Church of England recently introduced a service of 'extended communion',which is the distribution of previously consecrated elements by lay-people to congregations, in the absence of a priest This has been a highly controversial service, many theologians being against it, while at the same time policy-makers having to introduce the service. It is justified in part by reference to patristic precedent and to pastoral need, which raises significant theoretical questions about the relationship of theory and practice. This thesis analyzes the

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33

Norén, Gustav. "Noise Robustness of Convolutional Autoencoders and Neural Networks for LPI Radar Classification." Thesis, KTH, Matematisk statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-273604.

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This study evaluates noise robustness of convolutional autoencoders and neural networks for classification of Low Probability of Intercept (LPI) radar modulation type. Specifically, a number of different neural network architectures are tested in four different synthetic noise environments. Tests in Gaussian noise show that performance is decreasing with decreasing Signal to Noise Ratio (SNR). Training a network on all SNRs in the dataset achieved a peak performance of 70.8 % at SNR=-6 dB with a denoising autoencoder and convolutional classifier setup. Tests indicate that the models have a dif

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34

Benson, Stephen Ray. "Modern Digital Chirp Receiver: Theory, Design and System Integration." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1450737245.

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35

Comblet, Fabrice. "Détection, localisation et identification de cibles radar par imagerie électromagnétique bistatique." Phd thesis, Université de Bretagne occidentale - Brest, 2005. http://tel.archives-ouvertes.fr/tel-00011931.

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L'objectif de cette thèse est de développer, caractériser et analyser l'imagerie radar en configuration bistatique. Dans le cadre de notre étude, nous nous plaçons dans le cas général d'une configuration bistatique sans condition sur la configuration d'acquisition. Nous avons alors développé un algorithme de reconstruction d'images tenant compte des polarisations d'émission et de réception. Ainsi, nous avons pu caractériser les images obtenues et donner l'expression des résolutions d'une image bistatique en fonction de la configuration d'acquisition. Ensuite, nous avons étudié les images bista

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36

Zietsman, Christian Frederick. "Theory, design and implementation of an IF cancellation module for use in a stepped frequency continuous wave ground penetrating radar." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/14972.

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Bibliography: leaves 64-68.<br>A device has been designed that cancels the leakage signal between the transmit and receive antenna in a Stepped Frequency Continuous Wave Ground Penetrating Radar. The front end of the radar operates at high signal levels and, as a result, a large signal is coupled directly from the transmit to the receive antenna. This signal uses a signiï¬ cant part of the dynamic range of the data-capturing device, an analogue-to-digital converter (ADC). The objective of this cancellation is thus to increase the effective instantaneous dynamic range of the radar system. Simul

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37

Chéty, Laurent. "Diffraction d'ondes electromagnetiques par des objets de forme et de nature arbitraires : etude de faisabilite d'une representation integrale." Paris 6, 1988. http://www.theses.fr/1988PA066144.

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La finalite de ce travail est la modelisation de l'interaction d'une onde electromagnetique plane en regime harmonique avec des composantes simples d'une cible complexe. Ceci dans le but de caracteriser soit la contribution de chaque element de la structure au champ diffracte, soit le couplage entre elements distincts. Une application particuliere concerne la surface equivalente radar, monostastique et bistatique, de ces structures. L'utilisation d'equations integrales de surface permet d'obtenir les courants electrique et magnetique induits par l'onde incidente. Ces equations integrales sont

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38

Casbeer, David W. "Decentralized Estimation Using Information Consensus Filters with a Multi-static UAV Radar Tracking System." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd2779.pdf.

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39

Borderieux, Sylvain. "Apport de la théorie de l’information quantique dans la perspective du radar quantique." Electronic Thesis or Diss., Brest, École nationale supérieure de techniques avancées Bretagne, 2022. http://www.theses.fr/2022ENTA0011.

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Cette thèse propose une approche originale de la thématique du radar à illumination quantique en recourant à la théorie de l’information quantique pour étudier l’évolution des corrélations quantiques le long d’une chaîne radar. Ce mémoire propose d’abord un parallèle des différences et similitudes entre les théories du radar classique et du radar quantique en insistant sur les principes propres aux deux théories. Le radar à illumination quantique étudié utilise des paires de photons intriqués pour établir la présence ou l’absence d’un objet faiblement réfléchissant baigné dans un bruit thermiq

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40

Elghannai, Ezdeen Ahmed. "NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173.

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41

Cetin, Aysin. "Cfar Detection In K-distrbuted Sea Clutter." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609857/index.pdf.

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Conventional fixed threshold detectors set a fixed threshold based on the overall statistical characteristics of the spatially uniform clutter over all ranges to give a specific probability of false alarm and detection. However, in radar applications clutter statistics are not known a priori. Constant False Alarm Rate (CFAR) techniques provide an adaptive threshold to estimate the clutter statistics and to distinguish targets from clutter. In Cell Averaging CFAR (CA-CFAR) the threshold is controlled by averaging the fixed size CFAR cells surrounding the cell under test. In this thesis, radar d

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42

Yang, Le. "Médianes de mesures de probabilité dans les variétés riemanniennes et applications à la détection de cibles radar." Phd thesis, Université de Poitiers, 2011. http://tel.archives-ouvertes.fr/tel-00664188.

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Dans cette thèse, nous étudierons les médianes d'une mesure de probabilité dans une variété riemannienne. Dans un premier temps, l'existence et l'unicité des médianes locales seront montrées. Afin de calculer les médianes aux cas pratiques, nous proposerons aussi un algorithme de sous-gradient et prouverons sa convergence. Ensuite, les médianes de Fréchet seront étudiées. Nous montrerons leur cohérence statistique et donnerons des estimations quantitatives de leur robustesse à l'aide de courbures. De plus, nous montrerons que, dans les variétés riemanniennes compactes, les médianes de Fréchet

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43

Ertug, Ozgur. "Generalized Random Spreading Performance Analysis Of Cdma Over Gwssus Fading Channels." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12607022/index.pdf.

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Since direct-sequence code-division multiple-access (DS-CDMA) is an interference-limited random multiple-access scheme, the reduction of co-channel interference with either interference suppression or interference cancellation multiuser receivers and/or power control to prevent detrimental near-far situations is vital for improved performance. Up to date, some contributions investigated randomly-spread asymptotically - large number of users and large bandwidth - large CDMA systems with multiuser receivers and power control via random matrix theoretic and free probability theoretic tools especi

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44

Jdey, Aloui Imen. "Contribution des techniques de fusion et de classification des images au processus d'aide à la reconnaissance des cibles radar non coopératives." Thesis, Brest, 2014. http://www.theses.fr/2014BRES0008.

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La reconnaissance automatique de cibles non coopératives est d’une grande importance dans divers domaines. C’est le cas pour les applications en environnement incertain aérien et maritime. Il s’avère donc nécessaire d’introduire des méthodes originales pour le traitement et l’identification des cibles radar. C’est dans ce contexte que s’inscrit notre travail. La méthodologie proposée est fondée sur le processus d’extraction de connaissance à partir de données (ECD) pour l’élaboration d’une chaine complète de reconnaissance à partir des images radar en essayant d’optimiser chaque étape de cette

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45

Skånfors, Lovisa. "Barns sociala vardagsliv i förskolan." Doctoral thesis, Karlstads universitet, Institutionen för pedagogiska studier, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-28622.

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The overarching aim of the studies in this dissertation is to contribute knowledge about children’s shared social knowledge in their preschool peer cultures, regarding both content and how it is established and maintained. An ethnographic approach has been used to study the shared activities of children, aged 3-5, in the preschool. During 1 ½ years, one preschool setting was visited on a regular basis. One hundred hours of observation have been made and documented through video camera recordings and field notes. The theory of children’s peer cultures (Corsaro, 2005), positioning theory (Harré

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46

Tran, Nguyen Duy. "Performance bounds in terms of estimation and resolution and applications in array processing." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2012. http://tel.archives-ouvertes.fr/tel-00777503.

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This manuscript concerns the performance analysis in signal processing and consists into two parts : First, we study the lower bounds in characterizing and predicting the estimation performance in terms of mean square error (MSE). The lower bounds on the MSE give the minimum variance that an estimator can expect to achieve and it can be divided into two categories depending on the parameter assumption: the so-called deterministic bounds dealing with the deterministic unknown parameters, and the so-called Bayesian bounds dealing with the random unknown parameter. Particularly, we derive the clo

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47

Mahmod, Shad. "Deinterleaving pulse trains with DBSCAN and FART." Thesis, Uppsala universitet, Avdelningen för systemteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-379718.

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Studying radar pulses and looking for certain patterns is critical in order to assess the threat level of the environment around an antenna. In order to study the electromagnetic pulses emitted from a certain radar, one must first register and identify these pulses. Usually there are several active transmitters in anenvironment and an antenna will register pulses from various sources. In order to study the different pulse trains, the registered pulses first have to be sorted sothat all pulses that are transmitted from one source are grouped together. This project aims to solve this problem, us

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48

Cevik, Gozde. "Feature Based Modulation Recognition For Intrapulse Modulations." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607676/index.pdf.

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In this thesis study, a new method for automatic recognition of intrapulse modulations has been proposed. This new method deals the problem of modulation recognition with a feature-based approach. The features used to recognize the modulation type are Instantaneous Frequency, Instantaneous Bandwidth, Amplitude Modulation Depth, Box Dimension and Information Dimension. Instantaneous Bandwidth and Instantaneous Frequency features are extracted via Autoregressive Spectrum Modeling. Amplitude Modulation Depth is used to express the depth of amplitude change on the signal. The other features, Box

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49

Ozel, Omur. "Optimal Resource Allocation Algorithms For Efficient Operation Of Wireless Networks." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610732/index.pdf.

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In this thesis, we analyze allocation of two separate resources in wireless networks: transmit power and buffer space. Controlled allocation of power can provide good performance for both users and the network. Although centralized mechanisms are possible, distributed power control algorithms are preferable for efficient operation of the network. Viewing distributed power allocation as the collection of rational decisions of each user, we make game theoretic problem formulations, devise distributed algorithms and analyze them. First, equilibrium analysis of a vector power control game based on

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50

GERMOND, ANNE-LAURE. "Theorie de la polarimetrie radar bistatique." Nantes, 1999. http://www.theses.fr/1999NANT2008.

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Le travail effectue propose une extension de la theorie de la polarimetrie radar, elaboree pour des systemes de mesures monostatiques, vers une theorie applicable a des systemes de mesures bistatiques. L'objectif de cette etude est de fournir des outils permettant de decrire les cibles dans le but de les caracteriser, de les classifier, voire de les identifier. Toute cible peut etre consideree, suivant sa structure, comme un modificateur plus ou moins fort de l'etat de polarisation de l'onde emise, vis-a-vis de l'onde diffusee. Elle est modelisee par une matrice, appelee matrice de diffusion.

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