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Dissertations / Theses on the topic 'Radar Technology'

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Published: 4 June 2021
Last updated: 26 July 2024

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1

Kroener, I. "CCTV : a technology under the radar?" Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/19711/.

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Closed-circuit television (CCTV) cameras have become a ubiquitous feature of everyday life in the UK over the last thirty years. In this thesis I undertake an examination of the historical, political, social, economic, and technological factors, influencing the development, usage, and widespread dissemination of CCTV in the UK. I focus on the issue of why the UK has become so camera-surveilled, and especially the specific role that the public has played in relation to the development and use of the technology. I examine the historical factors through an analysis of the development of surveillance, policing, and political change, during the 20th and early 21st centuries, and early and contemporary uses of CCTV, situating this in the wider context of a history of the criminal justice system. I also look at the media and policy context in which CCTV has developed and become widespread, with this element of the thesis particularly informed by an analysis of the way in which the public are constructed. Next, I carry out an empirical study exploring public engagement and consultation in relation to, and feelings towards, the installation of CCTV onto two estates in East London as part of a project to expand access to digital services in London. Finally, I give an overview of international experiences of CCTV providing a broader context for the final analysis. I argue that the lack of legislation and regulation at the time of the inception of CCTV allowed its subsequent and rapid proliferation. The initial growth of CCTV also occurred at a time when public debate and engagement in science and technology policy did not take place. Its use as a tool for crime prevention was cemented by a police force looking for a shoulder to share the burden of fighting crime. This coupled with an availability of public money for the installation of CCTV systems, the need for a political solution to rising levels of crime, and an apparently passive public, formed the ideal environment for the rise of CCTV.
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2

Lindgren, Tore. "Algorithm development for multistatic GNSS radar technology /." Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1757/2007/29/.

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3

Lundströmer, Torbjörn. "LPI-radar. Nys eller nytta? : Studie av den militära nyttan med LPI-radar." Thesis, Försvarshögskolan, Militärtekniska avdelningen (MTA), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-975.

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Sedan radar började användas under första hälften av 1900-talet har duellen mellan radar och signalspaning pågått. Genom att utnyttja radar har alltid en medveten risk tagits, risken att bli upptäckt av motståndarens signalspaning. Duellen gavs möjlighet att ta en paus då radarsystem med låg uteffekt introducerades på marknaden under slutet av 1980-talet, nu fanns plötsligt en möjlighet att använda radar samtidigt som de samtida signalspaningssystemen inte kunde upptäcka dessa radarsystem. I föreliggande magisteruppsats i krigsvetenskap med militärteknisk inriktning undersöks räckviddsförhållanden mellan dessa radarsystem och signalspaningssystem. Genom scenarier i den marina arenan försöker jag värdera de taktiska vinster en användare av radar med låg uteffekt kan göra. Analysen visar på att det fram till dess att signalspaningssystem med förmåga att upptäcka radar som utnyttjar låg uteffekt finns tillgängligt är det möjligt att nå taktiska fördelar med dessa system.
Since the advent of radar during the early 20th century the duel between radar and electronic support measurement systems has been practised. Using radar has always been associated with a risk of being detected by an opponent’s electronic support measurement systems. The duel came to a halt when radar systems using low output power were introduced on the market during the late 1980s, now it was possible to use radar without being detected by contemporary electronic support measurement systems. The present master of science (one year) thesis in war science with specialization in military technology looks into the range relationships between radar and electronic support measurement systems. Through scenarios in the naval domain, I seek to assess the tactical benefits a user of low probability of intercept radar may have. The analysis indicates that until electronic support measurement systems with the ability to detect radar systems using low output power are available it is still possible to gain tactical advantages with such systems.
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4

Goulet, Dennis A., Joseph McMorrow, G. Edward Roberts, and Robert Lynch. "VESSEL TRAFFIC MANAGEMENT SYSTEM A Test Technology Development and Demonstration Project." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607390.

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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The Vessel Traffic Management System is a cooperative effort of the Naval Undersea Warfare Center and the Naval Air Warfare Center Aircraft Division, funded by the OSD's Test Technology Development and Demonstration Program. The project is establishing the capability to acquire ship tracking information from numerous sources (GPS and radar target extractors), and combine them into a comprehensive, integrated view of the range safety target area. The consolidated tracking information will be transmitted to range safety vessel personnel and presented on portable display systems to aid in clearing the surveillance area of unauthorized vessels. The communications module is media independent in that positional and image data can be routed via RF modem, cellular phone, Intranet or Internet, singly or in any combination. The software systems for data acquisition, display and control are also platform independent, with the system under development operating under WindowsNT and Windows95. Additionally, the use of Java and VRML tools permits a user to display data (including three dimensional presentations of the data) without requiring the applications software. This system has numerous applications including range safety, commercial vessel traffic management, port authority and services monitoring, and oceanographic data gathering.
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5

Forslöw, Tobias. "Visualizing Radar Signatures." Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7770.

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It is important for the military to know as much as possible about how easily detected their vehicles are. One way among many used to detect vehicles is the use of radar sensors. The radar reflecting characteristics of military vehicles are therefor often rigorously tested. With measurements and simulations it is possible to calculate likely detection distances to a vehicle from different angles. This process often produces very large data sets that are hard to analyze.

This thesis discusses and implements a method for visualizing the detection distance data set and also discusses a lot of related issues with a focus on computer graphics.

The main concept is called spherical displacement and the idea is to visualize the detection distances as a surface with the imagined vehicle in the center point. Detection is likely inside the surface but not on the outside. This concept is the next step from the colored sphere where the colors represent the detection distance which was previously used.

The thesis project resulted in a visualization tool that uses the new concept and can handle large data sets. The spherical displacement concept is more intuitive and shows detail better than the colored sphere visualization.

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6

Kelkar, Anand, and Luc Gravelle. "THE APPLICATION OF RADAR ENVIRONMENT SIMULATION TECHNOLOGY TO TELEMETRY SYSTEMS." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/609227.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California
Complete real time testing of a telemetry tracking system typically requires the use of a cooperative target operating under conditions specially set up to simulate actual flight scenarios. This is a very expensive, time-consuming process and does not necessarily exercise all of the functions and capabilities available in new digital antenna controllers. This paper introduces Radar Environment Simulator technology and its application to testing of telemetry tracking systems. Measured results are shown, demonstrating that operational environment simulation is a valuable approach to quickly and effectively characterize the real time operation of a telemetry tracking system.
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7

Heuschel, Eugene R. "Time-frequency, bi-frequency detector analysis of noise technology radar." Thesis, Monterey, California. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/2636.

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Enemy integrated air defense systems (IADS) using low probability of intercept (LPI) emitters can cause significant problems for suppression of enemy air defense (SEAD) techniques. New threat emitter configurations using low-power random noise modulation have a significant processing gain unavailable to non-cooperative intercept receivers. Consequently, the detection of these emitters can not be accomplished with conventional intercept receiver detection methods. This thesis examines the use of time-frequency, bi-frequency signal detection techniques to identify the parameters of the four types of continuous waveform noise radar recently reported. These include: (a) random noise, (b) noise plus frequency modulation continuous wave (FMCW), (c) noise FMCW plus sine and (d) random binary phase modulation. Quadrature mirror filtering for wavelet decomposition is used to investigate the four types of noise signals in order to extract the signal parameters. The FFT accumulation method for estimating the spectral correlation density function is also used to examine the cyclostationary bi-frequency properties of the waveforms. In addition, the periodic autocorrelation function and periodic ambiguity function are studied to determine the waveform properties in the delay- Doppler offset domain. Results show that non-cooperative intercept receivers can increase their processing gain using these types of signal processing techniques providing a more efficient response time to the threat.
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8

Watts, Simon. "The modelling of radar sea clutter." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4359/.

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This thesis presents selected research papers and patents written by Simon Watts between 1985 and 2012 on the topic of the modelling of radar sea clutter. This work has been based on the development and exploitation of the compound K distribution model for the amplitude statistics of radar sea clutter. It has covered the development of the model, through the analysis of recorded radar data, to establish its validity over a wide range of conditions and for both coherent and non-coherent radar processing. The work has also developed methods for exploiting the model for improved performance prediction for radar systems, the analysis and development of new detection signal processing schemes and the use of these models for the specification and measurement of radar performance, for the procurement of radar systems. All the work has been undertaken in an industrial environment, motivated by the need to develop improved radar systems to meet customer requirements.
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Sjöberg, Andreas. "LPI waveforms for AESA radar." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413598.

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The purpose of low probability of intercept (LPI) radar is, on top of the standard requirements on a radar, to remain undetected by hostile electronic warfare (EW) systems. This can be achieved primarily by reducing the amount of radiated power in any given direction at all times and is done by transmitting longer modulated pulses that can then be compressed digitally in order to retain range resolution. There are multiple different methods of performing pulse compression modifying either the phase or frequency of the transmitted waveform. Another method for attaining LPI properties of a radar is to avoid having a large main lobe in the transmit pattern and instead having lower gain patterns. This then results in a need for post-processing of these patterns by summation of weighted combination of these low gain patterns in order to reform the high gain patterns and thus retain angular resolution. In this work a number of pulse compression waveforms are analysed and compared using their ambiguity properties in order to ascertain which ones can be used in a radar system. They are then used in simulation with GO-CFAR detectors using a variety of analysis tools, specifically the short term Fourier transform (STFT), Wigner-Ville distribution (WVD), quadrature mirror filter bank (QMFB) and spectral correlation density (SCD). Their performance against the detector is based on the rate that the waveforms trigger an alarm and the lower the alarm rate the better the performance. The base reference in terms of performance for these evaluations was set as a triangular FMCW waveform. The results show that the polyphase coded waveforms have good radar and LPI properties in comparison to the FMCW. The frequency hopping codes showed good LPI properties with a large number of frequencies in the sequence but suffer from large ACF side lobes and poor Doppler tolerance. The best LPI results were achieved by a phase coded signal with a random order to its phase terms whilst still maintaining a perfect periodic autocorrelation function (PACF). Potential issues remain with high frequency out of band emission that could lead to a mismatch due to receiver bandpass filtering. The low gain patterns investigated were expanded to include two way patterns for a 2D array and array element tapering. The method works and can be further optimised in order to minimise emissions but adds a significant increase to integration times when the array size grows large.
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Todkar, Shreedhar Savant. "Monitoring subsurface conditions of pavement structures using Ultra-wideband radar technology." Thesis, Nantes, 2019. http://www.theses.fr/2019NANT4060.

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Dans le domaine du génie civil, la détection et la caractérisation de défauts (décollements, fissures non-débouchantes) sont des éléments importants de diagnostic qui influencent la mise en œuvre de politique d’entretien et de gestion. Les défauts sont représentatifs d’un état d’altération de la structure. Les caractéristiques géométriques de ces défauts (forme, largeur et longueur) ainsi que l’étendue et les cheminements d’eau induits par ces défauts est un indicateur de durabilité des ouvrages important. Cette détection permet de localiser une éventuelle pathologie, d’évaluer l’état de santé de la structure et de prédire son évolution. Dans ce contexte, les systèmes « radar à impulsions », appelé aussi GPR (Ground Penetrating radar) est utilisé depuis une trentaine d’années pour réaliser des opérations de contrôle non destructif dans le flux du trafic. Ils fournissent une mesure en continu de l’épaisseur de la couche de chaussée, mais permettent aussi la détection de décollements significatifs (centimétrique) entre couches, et de déterminer ainsi l’emplacement de contrôles structurels destructifs ultérieurs. Néanmoins, la résolution temporelle des GPR conventionnels ne permet pas de détecter directement des décollements d’interface millimétriques. L’objectif de ce travail est donc de réaliser une détection précoce de ce type de défauts. Ainsi, mes travaux se sont focalisés à la fois sur l'utilisation du radar ultra large bande (RSF) et sur le développement de méthodes d’intelligence artificielle (basées sur l’apprentissage supervisé). Des approches théoriques et expérimentales (dalle de chaussée Cerema et manège de fatigue de l’IFSTTAR) ont été réalisées. Elles ont permis de montrer la faisabilité de détecter des décollements fins dans les chaussées
In the field of civil engineering, the detection and characterization of defects (debondings, non-emerging cracks) are important diagnostic elements that influence the maintenance and management of the pavement structure. These defects represent an altered state of the structure. The geometric characteristics of these defects (shape, width and length) as well as their extent and the water seepage induced by these defects are important durability indicators of the structures. This detection makes it possible to locate a possible pathology, to evaluate the state of health of the structure and also predict its evolution. In this context, "pulse radar" systems, also called Ground Penetrating Radar (GPR) have been used for over thirty years to perform non- destructive testing operations in the traffic flow. They not only provide continuous measurement of the thickness of the pavement layer, but also allow the detection of significant (centimetric) inter-layer detachments, and thus determine the location of subsequent destructive structural controls. However, the temporal resolution of conventional GPRs does not allow direct detection of millimeteric interface debondings. Therefore, the objective of this work is to realize an early detection of such defects. My work is thus focused on both the use of ultra-wideband radar (SFR) and the development of artificial intelligence methods (based on supervised learning) to detect thin debondings. Theoretical and experimental approaches (Cerema test pavement slabs and IFSTTAR's fatigue carousel) were realized which have shown the feasibility of detecting fine debondings in pavements
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11

Smuk, Jeffrey William Carleton University Dissertation Engineering Electrical. "Transmit/receive module technology for future spaceborne and airborne radar systems." Ottawa, 1987.

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Traille, Anya Nadira-Asanti. "Flexible monolithic ultra-portable ground penetrating radar using inkjet printing technology." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0095/document.

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Un géoradar (GPR) effectue une détection non destructive d'objets enfouis, ou l'imagerie du sous-sol par transmission d'ondes électromagnétiques et la détection et l'analyse des réflexions. Le principal défi de GPR est la réduction de la portée de détection en raison de l'atténuation du signal grave causée par la conductivité du sous-sol qui devient plus sévère dans les hautes fréquences. Afin d'augmenter la portée de détection, GPR utilise des fréquences plus basses que les radars non-GPR et nécessite donc de plus grandes antennes qui peuvent limiter la portabilité du système. La plupart des systèmes utilisent des radars GPR à impulsion mais le FMCW (onde continue à fréquence modulée) radar peut présenter certains avantages tels que la versatilité de la fréquence, une maintenance réduite du système et une meilleure résolution de gamme. Les fréquences inférieures à 1 GHz ont d'abord été rares en radars de courte portée FMCW mais trouvent maintenant leur chemin de retour dans des systèmes comme ultra-large bande (UWB) pénétrant dans le sol des radars pour la détection des mines et ainsi que d'autres applications. Lorsque les mesures sont effectuées sur des véhicules, de grands appareils d'antenne ne sont pas un problème. La portabilité, cependant, peut devenir un problème dans les études géophysiques ou des travaux d'urgence dans laquelle on peut avoir besoin de transporter le système par des endroits accidentés, inexplorés et / ou dangereux sans accès aux véhicules. Des environnements inaccessibles peuvent nécessiter la manœuvrabilité à travers d’obstacles (montagnes, grottes, lacs, zones rocheuses). D’ailleurs, l’installation rapide du système est critique dans des conditions difficiles telles que les températures extrêmes, où le temps d'exposition est coûteux et le temps de mesure limité. Une solution pour améliorer la portabilité et la capacité de déploiement d'un système GPR est de réaliser un système complet sur un substrat qui est enroulable afin de permettre une transportation facile. L’électronique sur substrat flexible a déjà été utilisée dans des applications militaires et des sports en plein air. Actuellement, il y a quelques technologies disponibles pour réaliser l'électronique flexible qui ont été un thème majeur en recherche, chacune avec différents niveaux d'intégration. La technologie d'impression à jet d'encre offre une méthode efficace, polyvalente et rentable pour la réalisation de dispositifs flexibles. Dans ce travail, un système radar FMCW classique a été conçu et un travail présenté, pour la première fois, d’application de la technologie d'impression à jet d'encre sur un système de radar. Le système est appelé un système de radar monolithique portable dans lequel tous les agents actifs, passifs et l'antenne sont destinés à partager le même substrat enroulable continu. Ainsi, une intégration hybride est utilisée pour étudier la fiabilité et la performance du système complet enroulé autour d’un rayon serré. Plusieurs défis de conception d'un grand système ont été surmontés qui donneront un aperçu de nouveaux modèles au fur et à mesure que le niveau d'intégration à l'aide de la technologie d'impression à jet d'encre continue d’augmenter
Flexible monolithic ultra-portable ground penetrating radar using inkjet printing technology A Ground Penetrating Radar (GPR) performs nondestructive detection of buried objects, or subsurface imaging by transmitting electromagnetic waves and detecting and analyzing the reflections. The main challenge of GPR is the reduction in detection range due to the severe signal attenuation that is caused by subsurface conductivity that becomes more severe at high frequencies. In order to increase the detection range, GPR uses lower frequencies than non-GPR radars and thus requires larger antennas that may limit system portability. Most GPR systems use impulse radars however the FMCW (frequency modulated continuous wave) radar can provide some advantages such as frequency versatility, reduced system maintenance and improved range resolution. Frequencies below 1 GHz were initially uncommon in short-range FMCW radars but are now finding their way back in systems such as ultra-wideband (UWB) ground penetrating radars for mine detection and as well as other applications. When measurements are performed on vehicles, large antenna fixtures are not a problem. Portability, however, can become an issue in geophysical studies or emergency work in which one may need to transport the system through rugged, unexplored and/or hazardous locations without vehicle access and perform measurements. Inaccessible environments may require climbing up and down, squeezing through, jumping over, crawling under, maneuvering through or swimming through obstacles (mountains, caves, lakes, rocky areas). In addition to transportation, rapid system setup is critical in difficult conditions such as freezing temperatures or extreme heat where exposure time is costly and limits measurement time. One solution to enhance the portability and deployability of a GPR system for wide area rugged measurements is to realize a complete system on a continuous substrate that is rollable around a reasonably small radius and storable in a scroll or poster-like fashion for easy backpack transportation. Electronics that can flex and bend have already used in military applications and for outdoor sporting gear. Currently, there are a few types of technology available to realize flexible electronics that have been a major topic of research, each with different levels of integration. Inkjet printing technology offers a cost effective, versatile and efficient method for realizing flexible devices. In this work a classical FMCW radar system is designed and an effort is made, for the first time, to apply inkjet printing technology to a radar system. The system is referred to as a portable monolithic radar system in which all actives, passives and antenna are meant to share the same continuous rollable substrate. In doing this, a medium level of integration is used to investigate limits of system complexity, resolution and ultra miniaturization for tight rollability. Various design challenges of a large system are overcome that will hopefully give insight to new designs as the integration level using inkjet printing technology increases
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Andréasson, Thomas. "Signal Processing Using Wavelets in a Ground Penetrating Radar System." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1774.

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This master's thesis explores whether time-frequency techniques can be utilized in a ground penetrating radar system. The system studied is the HUMUS system which has been developed at FOI, and which is used for the detection and classification of buried land mines.

The objective of this master's thesis is twofold. First of all it is supposed to give a theoretical introduction to the wavelet transform and wavelet packets, and also to introduce general time-frequency transformations. Secondly, the thesis presents and implements an adaptive method, which is used to perform the task of a feature extractor.

The wavelet theory presented in this thesis gives a first introduction to the concept of time-frequency transformations. The wavelet transform and wavelet packets are studied in detail. The most important goal of this introduction is to define the theoretical background needed for the second objective of the thesis. However, some additional concepts will also be introduced, since they were deemed necessary to include in an introduction to wavelets.

To illustrate the possibilities of wavelet techniques in the existing HUMUS system, one specific application has been chosen. The application chosen is feature extraction. The method for feature extraction described in this thesis uses wavelet packets to transform theoriginal radar signal into a form where the features of the signal are better revealed. One of the algorithms strengths is its ability to adapt itself to the kind of input radar signals expected. The algorithm will pick the "best" wavelet packet from a large number of possible wavelet packets.

The method we use in this thesis emanates from a previously publicized dissertation. The method proposed in that dissertation has been modified to the specific environment of the HUMUS system. It has also been implemented in MATLAB, and tested using data obtained by the HUMUS system. The results are promising; even"weak"objects can be revealed using the method.

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Li, Maureen Pei-Fang. "A cross-cultural study of the paradoxes of mobile technology in the mobile technology industry." Thesis, Oxford Brookes University, 2014. https://radar.brookes.ac.uk/radar/items/b90ce2a8-42b6-4c1b-b8bc-90de866cd62e/1/.

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The purpose of this study is to explore the theory of mobile technology paradoxes in a cross-cultural context, by examining relationships between cultural dimensions, perceived mobile technology paradoxes, the enacted coping strategies and consumer loyalty. A two-stage study is designed. Focus groups are used to explore and validate mobile technology paradoxes in the UK and Taiwan, and a self-administered Web-based questionnaire is conducted in the two countries. The data from the questionnaire are analysed by using structure equation modelling. The present research validates the research model relating to cultural dimensions, technology paradoxes, coping strategies and consumer loyalty in the UK and Taiwan. In both the UK and Taiwan, the perceived Competence/Incompetence paradox (CMP), coping strategies (CS) and consumer loyalty (CL) are related. The UK has two unique relationships: between the perceived Empowerment/Enslavement paradox (EMP) and CL; and between the perceived Dependence/Independence paradox (DEP), CS and CL. Taiwan has five unique relationships, which are the impact of the Individualism/Collectivism (IDV) on the perceived Illusion/Disillusion paradox (ILP), which in turn has an impact on CL; the impact of uncertainty avoidance (UAI) on the perceived EMP; the impact of UAI on the perceived CMP; the mediating effect of CS on the relationship between the perceived CMP and CL; and finally, the impact of the perceived DEP on CL. The perceived CMP, linked to perceived efficiency and effectiveness, is the theme that most closely relates to CL in the mobile technology industry. Marketers in the UK and Taiwan should focus on developing features and applications that enable efficient and effective lifestyles for consumers. Marketing communication strategies should focus on explicitly demonstrating potential improvements in lifestyle. The perceived dependence, despite its negative attribute, also has a positive impact on consumer loyalty in both countries. Taiwanese consumers have significantly higher perceived dependence than their UK counterparts, and it cannot be explained by cultural dimensions. Further research is required on this aspect.
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Bengtsson, Robin. "Security creating technology for elderly care." Thesis, Tekniska Högskolan, Jönköping University, JTH, Industridesign, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-50760.

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The aging population is growing and as more elderly need nursing the demand on elderly care is increasing. There is a risk of not having enough staff in an industry that already lacks educated staff. Many of the employees also complain that they are stressed out. This has led to an increasing number of gadgets and tools used within elderly care but not without problems. The technologies have been criticized for being designed to fit the need of the people in control rather than the elderly and the caregivers. This thesis has mapped the situation within todays elderly care and provided a solution to those needs and problems found. The focus has been to make a design that is fit for the elderly and the caregivers. The project has been made with a human centered design approach by letting elderly and caregivers participate in the process. A keystone has been to make the solution emit a sense of coherence for the elderly. The result is a radar unit which scans for blood pressure, respiration, pulse, and falls. The radar can be complimented with a camera to provide even more security. The achieved result can bring a sense of coherence for the elderly but needs to be further tested in order to prove it. This work can be used for future studies.
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Bauermeister, E. F. "Implementing a ground penetrating radar user interface in system-on-chip technology." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/5243.

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Ground penetrating radar technology is used to provide a fast and accurate method for target location compare to other geophysical sensing techniques. An existing ground penetrating radar system developed by Open Fuel (Pty) Ltd is used in the detection and avoidance of obstacles for a sub-surface horizontal directional drill mechanism. This ground penetrating radar system could be implemented as a portable surface-based version of the system for geophysical applications. A factor limiting its implementation is a personal or a laptop computer required to execute the human-machine interface software package for the radar system. Thus, there exists a need to produce a radar user interface to replace the computer required by the current ground penetrating radar system, while maintaining the original functionality of the radar system, while maintaining the original functionality of the radar system. The purpose of this design project was to develop a user interface for a ground penetrating radar system in hardware. The radar user interface had to allow for the autonomous operation of the ground penetrating radar system and the human-machine interface application software.
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Lindblom, Sebastian, and David Johansson. "Automatic System Tests on Airborne Radar Systems." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-340345.

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The aim of this master thesis was to create automated system tests on airborne radar systems. Automated tests can reduce time spent on repetitive and monotone work and instead create time for exploratory testing and customer criteria testing. Nightly builds and well designed tests can improve robustness and create a more stable system for the user. The project started with a pre-study, which consisted of researching the system in question, researching the possibilities of automated tests on said system and different tools that could be used in the project. Furthermore the pre-study contained interviews, visits and workshops within SAAB, with topics including automated tests, automation software and the SAAB GlobalEye system. The solution included two separated tests, one regression test and one startup test. The regression test verifies that selected standard functions works with the new soft/hardware updates and the Startup test verifies that the starting sequences for selected subsystems are executed correctly. Both of these tests were installed in the test laboratory. The tests were separated in to two parts; one control part and one analysis part. By recording the data being sent on the different interfaces while performing the tests, it's made possible to analyze the recorded data. This method enables many tests to be performed on the same set of data. The control part was solved with a third party software, called Squish, from a German company named Froglogic. The analysis part was written in MATLAB, where the test results were presented as well. The chain of events was set up and executed by Jenkins (an open source automation software), which also served as a scheduler, to enable nightly builds.
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Galyean, Christina Pilkey. "Investigation and characterization of a thermal infrared all-sky imager." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/28004.

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Parpis, Lucas. "Weight reduction of radar platform : Concept development, analysis and evaluation." Thesis, KTH, Lättkonstruktioner, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-228204.

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The aim of this master thesis has been to produce and evaluate a set of lightweight concepts for a radar system mounting platform. The evaluation aims to cover relevant aspects specifically regarding the Saab Arthur weapon locating system, as well as the Saab Giraffe 4A multifunctional radar system. By request of Saab, weight reduction is the main performance gain of interest and this is therefore given high emphasis in the concept evaluation performed. Four concepts are developed through brainstorming and current market studies. These four concepts are briefly evaluated and two carbon fibre reinforced plastic (CFRP) based concepts are deemed the most promising. The remaining concepts are therefore disregarded in order to allow for more in-depth evaluation of the more promising CFRP concepts. The main structural evaluation is performed with the help of finite element analysis (FEA) that is preprocessed, solved and post processed in PTC Creo Simulate 3.0. The computer assisted design model (CAD-model) that is used as a basis for the FEA-model is created in PTC Creo 3.0. Due to the structural complexity of the current radar platforms, considerable simplifications of the structural geometry in the CAD-model and subsequently the FEA-model is necessary. In order to ensure proper benchmarking in a comparative study against current design of the radar platform, all cad- and FEA-models are modelled with the same simplifications. This ensures comparable results between the concepts being evaluated and the current design. The composite based concepts give rise to certain issues that require new solutions such as electromagnetic interference (EMI) shielding, joining of CFRP laminates and mounting equipment on CFRP laminates. In order to gain a sense of how problematic these issues are, solutions are identified through a study of currently used methods in other areas within Saab such as the Visby corvette [1] as well as external literature. In depth investigation such as FEA analysis and testing of such solutions is however outside the scope of this thesis and needs to be performed at a later stage if further resources towards realization are committed by Saab. The final conclusion of this work marks a balance between cost and performance gains. Carbon fibre reinforced plastic is expensive and manufacturing requires new methods, but the gains can be very significant in form of considerable weight savings of up to 35%. The identified issues with a composite radar platform such as EMI shielding do have realistic solutions but require significant further work.
Avsikten med detta examensarbete har varit att utveckla och utvärdera en uppsättning lättviktskoncept for en monteringsplattform till ett radarsystem. Utvarderingen har for avsikt att behandla relevanta aspekter sarskilt angående Saab Arthur vapenlokaliseringssystemet och Saab Giraffe 4A multifunktionsradarsystemet. For Saab ar viktbesparing den huvudsakliga förbättringen som eftersträvas och det har därför givits stor vikt i utvarderingsfasen i detta arbete. Fyra koncept tas fram genom brainstorming och undersökning av dagens marknad. Dessa fyra koncept utvärderas och två kolfiberarmerade plastkompositbaserad (CFRP) koncept bedöms vara mest lovande. De återstående koncepten utvärderas inte for att möjliggöra djupare analys av de mer lovande CFRP koncepten. Den strukturella analysen utfors med hjälp av en finita element analys (FEA) som förbehandlas, löses och efterbehandlas i mjukvaran PTC Creo Simulate 3.0. CAD-modellen (computer assisted design) som används som bas for FEA-modellen ritas i PTC Creo 3.0. Pa grund av den strukturella komplexiteten hos de nuvarande radarplattformarna har väsentliga förenklingar av den strukturella geometrin i CAD modellen och därmed     FEA modellen varit nödvändiga. I syfte att kunna jämföra koncepten i en jämförelsestudie har både CAD- och FEA-modellerna ritats med samma förenklingar. Detta möjliggör jämförbara resultat mellan de koncept som utvärderas och den nuvarande designen. De kompositbaserade koncepten ger upphov till nya problem som kräver att lösningar hittas, t.ex. elektromagnetiskt strålningsskydd (EMI) och sammanfogning av paneler och fastelement i kolfiberlaminat. I syfte att fa en bild av dessa problem och dess omfattning undersöks nuvarande lösningar på jämförbara problem som används inom andra områden av Saab, sa som Visby korvetterna [1] men aven extern litteratur har använts. Noggrann analys och utvardering av sådana lösningar ar däremot utanför ramarna for detta examensarbete och bor istället göras vid ett senare stadium om beslut tas att gå vidare med detta arbete. Slutsatsen av detta arbete landar i en balans mellan kostnad och egenskaps förbättringar. Kolfiberarmerade plaster ar dyra och produktion kräver nya metoder men fördelarna kan vara mycket signifikanta, sarskilt inom viktbesparing dar upp till 35% viktreducering kan nås. De identifierade problemen med en radarplattform i komposit sa som EMI-skydd har realistiska lösningar men mycket arbete kravs innan realisering.
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Jungner, Andreas. "Ground-Based Synthetic Aperture Radar Data processing for Deformation Measurement." Thesis, KTH, Geodesi och satellitpositionering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199677.

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This thesis describes a first hands-on experience working with a Ground-Based Synthetic Aperture Radar (GB-SAR) at the Institute of Geomatics in Castelldefels (Barcelona, Spain), used to exploit radar interferometry usually employed on space borne platforms. We describe the key concepts of a GB-SAR as well as the data processing procedure to obtain deformation measurements. A large part of the thesis work have been devoted to development of GB-SAR processing tools such as coherence and interferogram generation, automating the co-registration process, geocoding of GB-SAR data and the adaption of existing satellite SAR tools to GB-SAR data. Finally a series of field campaigns have been conducted to test the instrument in different environments to collect data necessary to develop GB-SAR processing tools as well as to discover capabilities and limitations of the instrument.   The key outcome of the field campaigns is that high coherence necessary to conduct interferometric measurements can be obtained with a long temporal baseline. Several factors that affect the result are discussed, such as the reflectivity of the observed scene, the image co-registration and the illuminating geometry.
Det här examensarbetet bygger på erfarenheter av arbete med en mark-baserad syntetisk apertur radar (GB-SAR) vid Geomatiska Institutet i Castelldefels (Barcelona, Spanien). SAR tekniken tillåter radar interferometri som är en vanligt förekommande teknik både på satellit och flygburna platformar. Det här arbetet beskriver instrumentets tekniska egenskaper samt behandlingen av data for att uppmäta deformationer. En stor del av arbetet har ägnats åt utveckling av GB-SAR data applikationer som koherens och interferogram beräkning, automatisering av bild matchning med skript, geokodning av GB-SAR data samt anpassning av befintliga SAR program till GB-SAR data. Slutligen har mätningar gjorts i fält for att samla in data nödvändiga for GB-SAR applikations utvecklingen samt få erfarenhet av instrumentets egenskaper och begränsningar.   Huvudresultatet av fältmätningarna är att hög koherens nödvändig för interferometriska mätningar går att uppnå med relativ lång tid mellan mätepokerna. Flera faktorer som påverkar resultatet diskuteras, som det observerade områdets reflektivitet, radar bild matchningen och den illuminerande geometrin.
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Dahlbäck, Niklas. "Implementation of a fast method for reconstruction of ISAR images." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2073.

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By analyzing ISAR images, the characteristics of military platforms with respect to radar visibility can be evaluated. The method, which is based on the Discrete-Time Fourier Transform (DTFT), that is currently used to calculate the ISAR images requires large computations efforts. This thesis investigates the possibility to replace the DTFT with the Fast Fourier Transform (FFT). Such a replacement is not trivial since the DTFT is able to compute a contribution anywhere along the spatial axis while the FFT delivers output data at fixed sampling, which requires subsequent interpolation. The interpolation leads to a difference in the ISAR image compared to the ISAR image obtained by DTFT. On the other hand, the FFT is much faster. In this quality-and-time trade-off, the objective is to minimize the error while keeping high computational efficiency.

The FFT-approach is evaluated by studying execution time and image error when generating ISAR images for an aircraft model in a controlled environment. The FFT method shows good results. The execution speed is increased significantly without any visible differences in the ISAR images. The speed-up- factor depends on different parameters: image size, degree of zero-padding when calculating the FFT and the number of frequencies in the input data.

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Wang, Haikou Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "Evaluation of insect monitoring radar technology for monitoring locust migrations in inland Eastern Australia." Awarded by:University of New South Wales - Australian Defence Force Academy, 2008. http://handle.unsw.edu.au/1959.4/38923.

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To evaluate the utility of insect monitoring radar (IMR) technology for long-term monitoring of insect migration, a mini-network of two IMR units in Bourke, NSW, and Thargomindah, Qld, and a base-station server in Canberra, ACT, was set up in eastern Australia. The IMR operated automatically every night under the control of a personal computer that also conducted data acquisition and processing. Digitisation of radar signals, their analysis (delimitation of echoes from background noise and adjoining echoes, followed by extraction of estimates for each target's speed, displacement direction, body alignment, radar cross-section, and wingbeat frequency and modulation pattern), and generation of observation summaries were implemented as a fully automated procedure. Wingbeat frequency was found to be retrievable from the IMR's rotary-beam signals, and this allowed each individual target to be characterised by its wingbeat as well as its size and shape. By drawing on ancillary information from the Australian Plague Locust Commission's database of field survey and light trap records, the echo characters indicative of Australian plague locust, Chortoicetes terminifera (Walker), were identified. Using these, about 140 nights with detectable plague locust migrations were identified for the Bourke IMR site during 1998 - 2001 and 31 nights for Thargomindah during 1999 - 2000. Analysis of these nights confirmed that C. terminifera migrates in association with disturbed weather, especially tropical troughs, in eastern Australia. Trajectory simulation based on IMR-derived displacement directions and flight speeds allowed the identification of population movements likely to reach favourable habitats and thus to develop rapidly and possibly cause a plague. The outbreak during 1999 - 2001 most likely originated from the southeastern agricultural belt after migrations and multiplications over several generations. The IMR observations demonstrated that C. terminifera migrates over long distances with the wind at night and indicated that it may have an orientation behaviour that prevents it from being taken too far into the arid inland, a trait that could be highly adaptive in this environment. The two IMRs were operational for more than 85% of scheduled time during the study period and provided a wealth of information of potential value for locust management and migration research
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Fisher-Høyrem, Stefan Tørnquist. "Time machines : technology, temporality, and the Victorian social imaginary." Thesis, Oxford Brookes University, 2012. http://radar.brookes.ac.uk/radar/items/eb70c917-81dc-fbd4-1ba8-4e36eb61b95a/1.

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Drawing on the conceptual framework developed by Charles Taylor in his A Secular Age (2007), this thesis seeks to recast the question of Victorian ‘secularization’ – a notion largely abandoned by historians. It does so by analysing the temporal dimension of three Victorian social imaginaries and their technological performance: railways and the establishment of a uniform national time; newspapers and the public sphere; and Bank of England paper notes and the integration of a national economy. It argues that in all three cases, a concept of secular time was actively invested and embedded on the level of the social imaginary and its material mediation. This allows historians again to speak of a process of secularization, albeit only on this particular level. However—and contrary to Taylor—the thesis argues that the temporal structure of Victorian modernity comprised two kinds of time at this very level, articulated together in a dialectic fashion: a secular time conceived as isochronic, abstract, and independent of motion; and a historical time conceived as pure qualitative duration. In this way, the thesis contributes towards the development of a genuinely postsecular paradigm for future research into the nature of Victorian modernity.
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Sigonius, Marc. "Speed and yaw rate estimation in autonomous vehicles using Doppler radar measurements." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240369.

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One of the key elements for model-based autonomous drivingis the ability of the vehicle to accurately predict its ownmotion. Knowledge about the motion can then be widelyused, e.g. for localization, planning and control.This thesis presents an algorithm that estimates thevelocity and the yaw rate based on Doppler radar measurements.This system uses an Unscented Kalman filterto extract the motion of the vehicle from multiple Dopplerradar sensors mounted on the vehicle. The estimation ofthese quantities is shown to be critically dependent on outlierdetection and the vehicle’s center of rotation. Thiswork presents a framework for detecting dynamical objects,as well as estimating the center of rotation of the vehicleeffectively.In tests, the proposed implementation shows better rootmeansquared error performance than the current employedalgorithm by 28.8% and 22.4% for velocity and yaw rate,respectively.
Ett krav för att kunna köra ett modellbaserat autonomt fordon är att fordonet kan prediktera sin rörelse. Dess rö- relse kan vidare användas i många olika applikationer, till exempel lokalisering, plannering och reglering. Denna masteruppsats presenterar ett algoritm som es- timerar hastighet och vinkelhastighet baserat på mätningar från radarsensorer. Algoritmen använder sig av ett unscen- ted Kalman filter som extraherar rörelsen från flera radar- sensorer som är placerade på fordonet. Skattningen av has- tigheten och vinkelhastigheten har visat sig vara kritiskt beroende på detektion av felaktiga mätningar samt for- donets rotationscentrum. Denna masteruppsats presenterar ett ramverk för att filtrera ut dynamiska objekt samt ett sätt för att skatta fordonets rotationscentrum. Den föreslagna algoritmen har visat sig ge lägre RMSE- värden med 28,8% för hastigheten och 22,4 kelhas- tigheten jämfört med nuvarande algoritm.
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Choudhary, Vipin. "Nondestructive testing and antenna measurements using UWB radar in industrial applications." Licentiate thesis, KTH, Teknisk informationsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291129.

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Many industries are rapidly substituting the manual test operations and move towards automated operations using modern technologies.Modern technologies such as digital cameras, sonic sensors, infrared sensors, and radar and lidar systems are used for non-destructive testingoperations. Among all the different sensors, radar systems have theability to penetrate built structures (dielectric materials), which makes them flexible and suitable for a wide range of industrial and military applications in non-destructive sensing. Such examples are the detection of damages in goods manufacturing, monitoring the health of manystructures, object detection through the wall for security purposes, etc.In particular, ultra-wide-band (UWB) radar systems are beneficial inproviding high measurement accuracy and simultaneously reduced sensitivityto passive interference (such as rain, smoke, mist etc.), immunity to external radiation and noise.The objectives of this thesis are: I) to investigate electrically small concealed structures using synthetic aperture radar (SAR), II) to determinethe complex refractive index of objects using an UWB radar system,and III) to answer to the question how we can reduce the mutual coupling (cross talk) in an UWB radar system with collocated transmitand receive antennae. In objective I, the aim is non-destructive testing of built structures, such as in concrete slab manufacturing or for use in the renovation process. In addition electrically small periodic meshes,and their orientation, could not be distinguished in conventional SAR images. The proposed polarimetric analysis method demonstrates the usefulness of the singular value decomposition (SVD) using back projection algorithm (BPA) in extracting information about shape and for classifying an electrically small object. Further in this thesis for objective II, a new method for determining the complex refractive index (or equivalently the complex relative permittivity) of objects with planar interfaces is presented. The proposed method is relatively insensitive to hardware-impairments such as frequency-dependence of antennas and analog front end. The objects can be finite in size and at a finite distance. The limits in size and distance for the method to be valid are experimentally investigated. Hence, the method is designed for industrial in-line measurements onobjects on conveyor belts. Furthermore, in the following parts of this thesis −objective III− we investigate and show how a microwave metamaterial based absorber can be used to improve the performance of aradar system for short range applications, when positioned between the transmit and receive antennas. As results, the error in estimated target distance is reduced and clutter reduction is improved.
Många branscher ersätter snabbt de manuella testoperationerna och går mot automatiserad drift med modern teknik. Modern teknik såsom digitalkameror, soniska sensorer, infraröda sensorer och radar och lidarsystem används för i icke-förstörande tester. Bland alla olika sensorerhar radarsystem förmågan att tränga igenom byggda strukturer (dielektriskmaterial), vilket gör dem flexibla och lämpliga för ett brettspektrum av industriella och militära applikationer vid icke-förstörande avkänning. Sådana exempel är upptäckt av skador vid tillverkning av varor, övervakning av hälsa hos många strukturer, detektering av objekt genom väggen av säkerhetsskäl etc. Speciellt är radarsystem med ultrabredband (UWB) fördelaktiga då de ger hög mätnoggrannhet och samtidigt minskad känslighet mot passiva störningar (såsom regn, rök,dimma etc.), och immunitet mot yttre strålning och buller. Syftet med denna avhandling är : I) att undersöka elektriskt små dolda struktur med syntetisk bländaradar (SAR), II) att bestämma komplex brytningsindex för objekt som använder UWB radarsystem, ochIII) att svar på frågan hur vi kan minska den ömsesidiga kopplingen(överhörning) i ett UWB radarsystem med sändar- och mottagarantenner nära varandra. I mål I, är målet icke-förstörande provning avbyggda struktures såsom vid tillverkning av betongplattor eller vid renovering. I tillägg kunde inte elektriskt små strukturer och deras inre struktur urskiljas i konventionella SAR-bilder. Den föreslagna polarimetriskaanalysmetoden visar på hur användbar singulärvärdesuppdelning(SVD) med bakåtprojektion (BPA) är för att få information om och för att klassificera elektriskt små objekt.Vidare i denna avhandling visas för mål II en ny metod för att bestämma komplexa brytningsindex (eller motsvarande komplexa relativa permittiviteten) hos objekt med plana ytor. Den föreslagna metoden är relativt okänslig för svagheter hos hårdvaran, såsom frekvensberoende hos antennener och analog front-end. Objekten kan vara av ändlig storlek och på ändligt avstånd. Begränsningarna i storlek och avstånd för metoden att vara giltig undersöktes experimentellt. Sålunda är metoden utformad för industriella mätningar på föremål på transportband. I de följande delarna av avhandlingen - mål III - undersöker och visar vi dessutom hur en absorbator för mikrovågor, baserad på metamaterial, kan användas för att förbättra prestanda hos ett radarsystem för korta avstånd, när absorbatorn placeras mellan sändar- och mottagantenner. Resultatet blir att felet i det bestämda avståndet till målet minskar och undertryckning av klotter ökar.

QC 20210309

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Aamir, Latif Muhammad. "Radar scattering from bodies of revolution using an efficient partial differential equation algorithm." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19120.

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A technique is presented for solving the problem of scattering by a three-dimensional body of revolution using a partial differential equation (PDE) technique, employed in conjunction with radiation boundary condition applied in the Fresnel region of the scatterer. The radiation boundary condition, which is used to truncate the PDE mesh, is based upon an asymptotic expansion derived by Wilcox. Numerical results illustrating the procedure and verifying the accuracy of the results are included. These results are compared with other theoretical calculations for perfectly conducting bodies of revolution of arbitrary shape.
Uppsatsnivå: D
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27

Sakiotis, Emmanouil. "Recent advances in the technology of microwave devices employed in radar systems, and the impact of these technologies on potential improvements to radar system performance." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA313696.

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Wikingsson, Jon. "Prediktering av radarvågutbredning i troposfären : en smal sak för den taktiske chefen?" Thesis, Swedish National Defence College, Swedish National Defence College, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-192.

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Detta självständiga arbete i militärteknik behandlar två simuleringsprogram för radarvågutbredning i syfte att undersöka konsekvenserna av dess nyttjande för den taktiske chefen till sjöss. Simuleringsprogrammens användbarhet mäts kvalitativt genom att respektive simuleringsprograms egenskaper ställs mot den taktiske chefens krav. Simulerings-programmen beskrivs utifrån teoretiska egenskaper i respektive program och utvärderas genom simuleringar av en typradar i tre olika vädertypfall. Den taktiske chefens krav grundas på personliga erfarenheter som fartygschef på korvett. Resultatet presenteras i form av positiva och negativa konsekvenser för den taktiske chefen vid nyttjande av respektive program.

 


This is a bachelor thesis in Military Technology which deals with two radar wave propagation simulation programs. The purpose is to examine the consequences of their use for the tactical commander at sea. The simulation programs usability is estimated qualitative by the programs quality and attribute versus the tactical commander demands. The simulation programs are described from their theoretical quality and attribute respectively and evaluated by three simulations of the study’s specific radar in three different weather cases. The tactical commander demands are based on personal experiences as commanding officer of a corvette. The result is presented as positive and negative consequences for the tactical commander when using the simulation programs respectively.

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Cardoso, Adilson S. "Design of high-isolation and wideband RF switches in SiGe BiCMOS technology for radar applications." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43694.

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RF switches are an essential building block in numerous applications, including tactical radar systems, satellite communications, global positioning systems (GPS), automotive radars, wireless communications, radio astronomy, radar transceivers, and various instrumentation systems. For many of these applications the circuits have to operate reliably under extreme operating conditions, including conditions outside the domain of commercial military specifications. The objective of this thesis is to present the design procedure, simulation, and measurement results for Radio Frequency (RF) switches in 130 nm Silicon Germanium (SiGe) BiCMOS process technology. The novelty of this work lies in the proposed new topology of an ultrahigh-isolation single-pole, single-throw (SPST) and a single pole, four-throw (SP4T) nMOS based switch for multiband microwave radar systems. The analysis of cryogenic temperature effects on these circuits and devices are discussed in this work. The results shows that several key-figures-of-merits of a switch, like insertion loss, isolation, and power handling capability (P1dB) improve at cryogenic temperatures. These results are important for several applications, including space-based extreme environment application where FET based circuits would need to operate reliably across a wide-range of temperature.
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Zilberman, Eric R. "Autonomous time-frequency cropping and feature-extraction algorithms for classification of LPI radar modulations." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FZilberman.pdf.

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31

Nordström, Mikael. "Atmosfärens påverkan på det taktiska utnyttjandet av elektromagnetisk vågutbredning för radar och optiska sensorer?" Thesis, Försvarshögskolan, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-1814.

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Huvudsyftet med denna uppsats är att visa på hur olika atmosfärsförhållanden kan påverka dettaktiska utnyttjandet av elektromagnetisk vågutbredning och behovet för en operatör att kunnaförstå och bedöma denna påverkan.Sensorer som använder det elektromagnetiska spektret utnyttjas mer och mer i våra militärasystem. Vädret och atmosfären påverkar transmissionen och vågutbredningen avelektromagnetiska vågor. Olika atmosfärs- och väderfenomen påverkar sensorernas frekvenseroch våglängder och skapar begränsningar i utnyttjandet. Utnyttjandet av sensorer och systemför att upptäcka och följa mål och hot kräver kunskapen att kunna bedöma hur sensorn ochsystemet påverkas när de används i olika klimat och väderförhållanden. Behovet av detta ärstort och kommer i framtiden att öka då vi mer och mer förlitar oss på tekniska hjälpmedel föratt kunna upptäcka och bekämpa mål i en stridsmiljö. Framtidens mer skiftande miljö medinternationella insatser i klimat som är mycket olikt det svenska kommer ytterligare attpåverka utprovningar och den kunskap som krävs. Uppsatsen beskriver situationer där vädrethar inverkan på utnyttjandet av elektromagnetiska vågor för radar och optiska sensorer.Uppsatsen ser också till behovet av utbildning i meteorologi och väderpåverkan.
The main purpose with this paper is to show how different atmospheric conditions have aninfluence on the tactical utilization of the electromagnetic propagation and the necessity for anoperator to understand and make an assessment of the effects.Sensors that use the electromagnetic spectra are more and more common in our militarysystems. Weather and the atmosphere effect the transmission and the propagation ofelectromagnetic waves. Different atmospheric and weather phenomena effect the choice offrequencies and wavelength of the sensors and create restraints in utilization. Utilization ofsensors and systems to detect and track targets and threats demands knowledge in how toassess how the sensors or the systems are affected when they are used in different climatic andweather conditions. The need for this is great and in the future it will increase when we willmore and more be relying on the technical expedient to detect and destroy a target in combatenvironment. In the future, a changing environment with international commitments in aclimate that is very different from the Swedish climate, will further influence the tests and theknowledge that is required. The paper describes situations where weather has an influence onutilization of electromagnetic waves for radar and optical sensors. The paper also looks intothe need for education in meteorology and weather influence.
Avdelning: ALB - Slutet Mag 3 C-upps.Hylla: Upps. ChP T 01-03
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Young, Steven D. "On The Development Of In-Flight Autonomous Integrity Monitoring Of Stored Geo-Spatial Data Using Forward-Looking Remote Sensing Technology." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1113854420.

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Habrman, Robert. "Creating a Database and a User Interface for Storing Test Data for Radar Equipment." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137889.

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Försvarets materielverk- test och evaluering (FMV T&E) are using an Excel application to store test data for radar equipment. This storing solution has some flaws as for accessibility, the way that the data is handled, and the way that the data is displayed. FMV T&E would like a new solution of displaying, storing, and accessing the data using a web browser. This thesis will therefore describe how a database and its user interface can be designed and implemented. This thesis also describes how this can be done in the best way regarding usability. The new solution can be accessed from anywhere due to the fact that it is going to be placed on a server which then can be accessed from a web browser. This new solution will exclude the flaws that the Excel application currently holds.
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Persson, Daniel. "Efficient Calculations of Two-Dimensional Radar Cross-Section Using DGFEM." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424009.

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A two-dimensional discontinuous Galerkin finite element method algorithm in the time domain was developed for calculation of the radar cross-section of an arbitrary object. The algorithm was formed using local nodal basis functions in each element and coupling them via numerical upwind flux. Both transverse electric and transverse magnetic polarization, as well as three different dispersive material models, were handled. The computational domain was effectively truncated with low reflections using the uniaxial perfectly matched layer method. Two different time stepping methods were used, low-storage explicit Runge-Kutta and Leap-Frog, to allow for flexibility in the time step and application of a stabilization method. The algorithm was verified with geometries, which have analytical expressions, and an existing validated code. The algorithm was also compared to an existing algorithm, which utilized the continuous finite element method with implicit time stepping, and showed outstanding performance regarding computation time and memory allocation. Since the developed algorithm had explicit time stepping could no general conclusions favoring any of the methods beyond these specific algorithms be made. The results still encouraged continued development of the DGFEM algorithm, where the expansion into three dimensions and optimizations could be explored further.
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Souder, William Dai Foster. "A low power 10 GHz phase locked loop for radar applications implemented in 0.13 um SiGe technology." Auburn, Ala, 2009. http://hdl.handle.net/10415/1631.

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36

Bassi, Matteo. "Analysis and Design of Radio Frequency Integrated Circuits for Breast Cancer Radar Imaging in CMOS Technology." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426174.

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Breast cancer is by far the most incident tumor among female population. Early stage prevention is a key factor in delivering long term survival of breast cancer patients. X-ray mammography is the most commonly used diagnostic technique to detect non-palpable tumors. However, 10-30% of tumors are missed by mammography and ionizing radiations together with breast compression do not lead to comfort in patient treatment. In this context, ultrawideband microwave radar technology is an attractive alternative. It relies on the dielectric contrast of normal and malignant tissues at microwave frequencies to detect and locate tumors inside the breast. This work presents the analysis and design of radio frequency integrated circuits for breast cancer imaging in CMOS technology. The first part of the thesis concerns the system analysis. A behavioral model of two different transceiver architectures for UWB breast cancer imaging employing a SFCW radar system are presented. A mathematical model of the direct conversion and super heterodyne architectures together with a numerical breast phantom are developed. FDTD simulations data are used to on the behavioral model to investigate the limits of both architectures from a circuit-level point of view. Insight is given into I/Q phase inaccuracies and their impact on the quality of the final reconstructed images. The result is that the simplicity of the direct conversion architecture makes the receiver more robust toward the critical impairments for this application. The second part of the thesis is dedicated to the circuit design. The main achievement is a 65nm CMOS 2-16GHz stepped frequency radar transceiver for medical imaging. The RX features 36dB conversion gain, >29dBm compression point, 7dB noise figure, and 30Hz 1/f noise corner. The TX outputs 14dBm with >40dBc harmonic rejection and <109dBc/Hz phase noise at 1MHz offset. Overall power dissipation is 204mW from 1.2V supply. The radar achieves 3mm resolution within the body, and 107dB dynamic range, a performance enabling the use for breast cancer diagnostic imaging. To further assess the capabilities of the proposed radar, a physical breast phantom was synthesized and two targets mimicking two tumors were buried inside the breast. The targets are clearly identified and correctly located, effectively proving the performance of the designed radar as a possible tool for breast cancer detection.
Il tumore al seno e' di gran lunga il piu' comune tumore nella popolazione femminile. La mammografia a raggi X e' la tecnica diagnostica piu' utilizzata e copre un ruolo chiave nella prevenzione, elemento fondamentale per assicurare la cura e la sopravvivenza dei pazienti. La mammografia presenta pero' importanti limitazioni, quali la necessita' di comprimere il seno durante l'esame, l'esposizione a radiazioni ionizzanti e l'alta percentuale di falsi negativi. In questo contesto, sembra interessante poter affiancare alla mammografia nuove tecniche diagnostiche, quali le tecnologie di imaging a radar nel range delle microonde, che si basano sull'intrinseco contrasto dielettrico presente tra tessuti benigni e maligni nel range delle microonde. Questo lavoro presenta quindi l'analisi e il progettazione di circuiti integrati in radio frequenza per l'imaging del tumore al seno in tecnologia CMOS. Nella prima parte della tesi vengono analizzati i modelli comportamentali di due diverse architetture di ricetrasmissione per l'imaging del tumore al seno. Vengono sviluppati dei modelli di ricetrasmettitori a conversione diretta e a super eterodina basati su radar SFCW e un modello numerico del seno. Simulazioni FDTD vengono utilizzate per investigare i limiti delle architetture considerate e individuare i punti critici nel design circuitale. Particolare attenzione viene dedicata ai mismatch tra i canali I e Q del ricetrasmettitore e al loro impatto sulla qualita' finale dell'immagine. Il risultato e' che la semplicita' della conversione diretta rende il ricetrasmettitore piu' robusto alle piu' critiche non-idealita' circuitali per questa applicazione. Nella seconda parte viene presentato un ritrasmettitore SFCW operante da 2 a 16GHz per imaging medicale realizzato in tecnologia CMOS 65nm. Il ricevitore ha un guadagno di conversione di 36dB, punto di compressione >29dBm, figura di rumore di 7dB e corner 1/f a 30Hz. Il trasmettitore ha una potenza di uscita di 14dBm, con reiezione delle armoniche di >40dBc e rumore di fase <109dBc/Hz ad un offset di 1MHz. Il sistema completo consuma 204mW. Il radar presentato raggiunge una risoluzione di 3mm dentro al corpo umano con un range dinamico di 107dB. Per dimostrarne l'efficacia, e' stato realizzato un seno sintetico dentro al quale sono stati inclusi due tumori. Il radar ha evidenziato correttamente i due tumori nella giusta posizione, a dimostrazione della sua efficacia come possibile strumento diagnostico.
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Steins, Dax. "Smart technology for telerehabilitation : a smart device inertial-sensing method for gait analysis." Thesis, Oxford Brookes University, 2016. https://radar.brookes.ac.uk/radar/items/adbc3997-d0bf-46ce-b72f-e6e616d204ec/1/.

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The aim of this work was to develop and validate an iPod Touch (4th generation) as a potential ambulatory monitoring system for clinical and non-clinical gait analysis. This thesis comprises four interrelated studies, the first overviews the current available literature on wearable accelerometry-based technology (AT) able to assess mobility-related functional activities in subjects with neurological conditions in home and community settings. The second study focuses on the detection of time-accurate and robust gait features from a single inertial measurement unit (IMU) on the lower back, establishing a reference framework in the process. The third study presents a simple step length algorithm for straight-line walking and the fourth and final study addresses the accuracy of an iPod’s inertial-sensing capabilities, more specifically, the validity of an inertial-sensing method (integrated in an iPod) to obtain time-accurate vertical lower trunk displacement measures. The systematic review revealed that present research primarily focuses on the development of accurate methods able to identify and distinguish different functional activities. While these are important aims, much of the conducted work remains in laboratory environments, with relatively little research moving from the “bench to the bedside.” This review only identified a few studies that explored AT’s potential outside of laboratory settings, indicating that clinical and real-world research significantly lags behind its engineering counterpart. In addition, AT methods are largely based on machine-learning algorithms that rely on a feature selection process. However, extracted features depend on the signal output being measured, which is seldom described. It is, therefore, difficult to determine the accuracy of AT methods without characterizing gait signals first. Furthermore, much variability exists among approaches (including the numbers of body-fixed sensors and sensor locations) to obtain useful data to analyze human movement. From an end-user’s perspective, reducing the amount of sensors to one instrument that is attached to a single location on the body would greatly simplify the design and use of the system. With this in mind, the accuracy of formerly identified or gait events from a single IMU attached to the lower trunk was explored. The study’s analysis of the trunk’s vertical and anterior-posterior acceleration pattern (and of their integrands) demonstrates, that a combination of both signals may provide more nuanced information regarding a person’s gait cycle, ultimately permitting more clinically relevant gait features to be extracted. Going one step further, a modified step length algorithm based on a pendulum model of the swing leg was proposed. By incorporating the trunk’s anterior-posterior displacement, more accurate predictions of mean step length can be made in healthy subjects at self-selected walking speeds. Experimental results indicate that the proposed algorithm estimates step length with errors less than 3% (mean error of 0.80 ± 2.01cm). The performance of this algorithm, however, still needs to be verified for those suffering from gait disturbances. Having established a referential framework for the extraction of temporal gait parameters as well as an algorithm for step length estimations from one instrument attached to the lower trunk, the fourth and final study explored the inertial-sensing capabilities of an iPod Touch. With the help of Dr. Ian Sheret and Oxford Brookes’ spin-off company ‘Wildknowledge’, a smart application for the iPod Touch was developed. The study results demonstrate that the proposed inertial-sensing method can reliably derive lower trunk vertical displacement (intraclass correlations ranging from .80 to .96) with similar agreement measurement levels to those gathered by a conventional inertial sensor (small systematic error of 2.2mm and a typical error of 3mm). By incorporating the aforementioned methods, an iPod Touch can potentially serve as a novel ambulatory monitor system capable of assessing gait in clinical and non-clinical environments.
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38

Mennie, James J. "A Culture/Climate Examination of Autonomous Vehicle Technology In The United States." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7546.

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Autonomous Vehicle are coming. But mass adoption is at least ten years away according to consensus compiled from interviews conducted with industry thought lenders. Questions remain as to what technology those vehicles will contain as there is no universal platform for autonomous vehicle technology, since manufacturers, hardware and software companies are developing their own proprietary products. A/V technology is expected to improve productivity, and provide a plethora of societal benefits, but while we await the closure of the time gap the US will lose almost 40,000 citizens each year with traffic fatalities. Connected vehicle technology, which is currently completing pilot studies, has been shown to reduce automobile accidents. This technology is not as complex as autonomous vehicle technology and is available now. Semi-autonomous vehicles which is Level 1 through Level 3 on the Society of Automobile Executives (SAE) scale is available on American automobiles today and has proven to be very popular amongst consumers. Technology convergence of semi-autonomous vehicle and connected vehicles can bridge the time gap until mass adoption of autonomous vehicle and contribute to reducing annual traffic fatalities. Combining these technologies will give drivers additional safety features thus providing them with the opportunity of making better decisions.
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Gratz, Joel Benjamin. "Unlocking the treasure chest: A study of technology transfer in the case of level-II radar data." Diss., Connect to online resource, 2005. 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:1433461.

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40

Schultz, Johan. "Sensordatafusion av IR- och radarbilder." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2193.

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Den här rapporten beskriver och utvärderar ett antal algoritmer för multisensordatafusion av radar och IR/TV-data på rådatanivå. Med rådatafusion menas att fusionen ska ske innan attribut- eller objektextrahering. Attributextrahering kan medföra att information går förlorad som skulle kunna förbättra fusionen. Om fusionen sker på rådatanivå finns mer information tillgänglig och skulle kunna leda till en förbättrad attributextrahering i ett senare steg. Två tillvägagångssätt presenteras. Den ena metoden projicerar radarbilden till IR-vyn och vice versa. Fusionen utförs sedan på de par av bilder med samma dimensioner. Den andra metoden fusionerar de två ursprungliga bilderna till en volym. Volymen spänns upp av de tre dimensionerna representerade i ursprungsbilderna. Metoden utökas också genom att utnyttja stereoseende. Resultaten visar att det kan vara givande att utnyttja stereoseende då den extra informationen underlättar fusionen samt ger en mer generell lösning på problemet.


This thesis describes and evaluates a number of algorithms for multi sensor fusion of radar and IR/TV data. The fusion is performed on raw data level, that is prior to attribute extraction. The idea is that less information will be lost compared to attribute level fusion. Two methods are presented. The first method transforms the radar image to the IR-view and vice versa. The images sharing the same dimension are then fused together. The second method fuses the original images to a three dimensional volume. Another version is also presented, where stereo vision is used. The results show that stereo vision can be used with good performance and gives a more general solution to the problem.

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Wichers, Ragnar. "A GUI Application for Controlling Handheld Radar Devices via Bluetooth and a Suitability Study of ZigBee." Thesis, Linköpings universitet, Kommunikationssystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70412.

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The CPR3 is a handheld radar device. This device is capable of detecting movement through walls and is mainly intended for police and military use. It is equipped with a Bluetooth module that enables remote control. To enhance the mobility of the users that utilize this functionality, a Windows Mobile application is developed. This application is meant to replace the already existing Windows application used for remotely controlling these radar devices. Furthermore, a small evaluation of the framework used for the development of the application is performed. Also, a theoretical performance analysis is performed on the ZigBee standard. The goal is to find out whether or not ZigBee is a suitable replacement technology for Bluetooth as the primary means of communication within the system.
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42

GUIDONI, GIANLUCA. "Coexistence issues for ultra-wideband radio technology." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/977.

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The goal of this Thesis is the assessment of the radio-coexistence between Ultra-wideband radio technology (UWB-RT) and some of the most important legacy narrow-band systems: Fixed Wireless Access (FWA), Point to Point (PP), Fixed Satellite Service (FSS) and Primary Radars operating in the 2.7-2.9 GHz band. UWB-RT is the most promising alternative for current medium-range communications technologies, best suited to short range applications in personal area networking. The versatility of this technology ranges from high data rate applications as USB cable replacement to location and tracking solutions in wireless sensor networks. But UWB concept is significantly different from traditional narrow-band radio systems and spread spectrum technologies: it uses a low peak power spread over an extremely wide bandwidth so overlapping the frequency bands already assigned to other systems. The high likelihood of a wide spreading of UWB devices linked to other properties such as low power consumption, small physical size of chips (requirement for next-generation consumer electronic devices like PDA, cell phone, ...) together with seamless connectivity and the multiple access, makes the UWB interference a big issue for peaceful radio coexistence with present and future narrow-band radiosystems. To make a fair appraisal about the UWB interference effects, this work has considered several facets of this issue starting from analyzing the features of UWB signals up to the integration of these characteristics within a communication system architecture; the requirements on the correct operation of the potential victim systems have been perused basing on ITU documents and detecting a criterion to measure the degradation of the performances due to UWB interference. Two reference scenarios have been identified to measure the UWB aggregate interference received by the generic victim receiver and how this UWB power is dependent on several parameters (some related to the adopted UWB signals and system such as modulation techniques or presence of a power control algorithm, some else linked to the features of the antenna and/or the operative centre frequency of the victim receiver, others associated with the propagation models)
Il fine di questa Tesi `e la valutazione della coesistenza radio tra la tecnologia radio Ultra-wideband (UWB-RT) e alcuni tra i pi`u importanti sistemi a banda stretta in vigore: Fixed Wireless Access (FWA), Point to Point (PP), Fixed Satellite Service (FSS) e Radar primari operatanti nella banda di frequenza 2.7-2.9 GHz. UWB-RT `e la pi`u promettente alternativa per le presenti tecnologie di comunicazioni a medio raggio, assai ben adatta ad applicazioni su corto raggio nel networking in area personale. La versatilità di questa tecnologia spazia da applicazioni ad alto ritmo di dati come la sostituzione dei cavi USB fino a soluzioni di localizzazione e tracciamento in reti wireless di sensori. Tuttavia il concetto UWB differisce significativamente dalle tecnologie tradizionali a spettro espanso e dei sistemi radio a banda stretta: esso usa un basso picco di potenza distribuito sopra una banda estremamente larga sovrapponendosi così alle bande di frequenza già assegnate ad altri sistemi. L’alta probabilità di una vasta diffusione di dispositivi UWB collegata ad altre proprietà quali il basso consumo di potenza, la piccola dimensione dei chip (requisito per la prossima generazione di dispositivi elettronici di consumo come il palmare, il telefono cellulare, ...) insieme alla connettività continua e l’accesso multiplo, rende l’interfrenza da UWB una grande questione per la pacifica coesistenza radio con gli attuali e futu- ri radiosistemi a banda stretta. Per fare una equa valutazione sugli effetti dell’interferenza UWB, questo lavoro ha considerato parecchi lati di questa questione dall’analizzare le caratteristiche dei segnali UWB fino all’integrazione di tali caratteristiche all’interno di un’architettura per un sistema di comunicazione; i requisiti sul corretto funzionamento dei potenziali sistemi vittima sono stati studiati con attenzione basandosi sui documenti ITU ed individuando il criterio per misurare la degradazione delle prestazioni dovute all’interferenza UWB. Due scenari di riferimento sono stati identificati per misurare l’interferenza aggregata UWB ricevuta dal generico ricevitore vittima e come tale potenza UWB dipenda da parecchi parametri (alcuni relativi al sistema e ai segnali UWB adottati quali tecniche di modulazione o presenza di un algoritmo di controllo della potenza, qualcun altro collegato alle caratteristiche dell’antenna e/o della frequenza centrale operativa del ricevitore vittima, altri associati ai modelli di propagazione).
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43

Thrivikraman, Tushar. "Analysis and Design of Low-Noise Amplifiers in Silicon-Germanium Hetrojunction Bipolar Technology for Radar and Communication Systems." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19755.

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This thesis presents an overview of the simulation, design, and measurement of state-of-the-art Silicon-Germanium Hetro-Junction Bipolar Transistor (SiGe HBT) low-noise amplifiers (LNAs). The LNA design trade-off space is presented and methods for achieving an optimized design are discussed. In Chapter 1, we review the importance of LNAs and the benefits of SiGe HBT technology in high frequency amplifier design. Chapter 2 introduces LNA design and basic noise theory. A graphical LNA design approach is presented to aid in understanding of the high-frequency LNA design process. Chapter 3 presents an LNA design optimization method for power constrained applications. Measured results using this design technique are highlighted and shown to have record performance. Lastly, in Chapter 4, we highlight cryogenic noise performance and present measured results from cryogenic operation of SiGe HBT LNAs. We demonstrate in this thesis that SiGe HBT LNAs have the capability to meet the demanding needs for next generation wireless systems. The aim of the analysis presented herein is to provide designers with the fundamentals of designing SiGe HBT LNAs through relevant design examples and measured results.
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44

Samarah, Ashraf [Verfasser]. "A novel approach for generating digital chirp signals using FPGA technology for synthetic aperture radar applications / Ashraf Samarah." Siegen : Universitätsbibliothek der Universität Siegen, 2012. http://d-nb.info/1023156792/34.

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45

Braun, Andreas [Verfasser], and Volker [Akademischer Betreuer] Hochschild. "Radar satellite imagery for humanitarian response. Bridging the gap between technology and application / Andreas Braun ; Betreuer: Volker Hochschild." Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/1192751515/34.

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46

Birch, K. "Biotechnology value chains as a case study of the knowledge economy : the relationship between knowledge, space and technology." Thesis, Oxford Brookes University, 2006. http://radar.brookes.ac.uk/radar/items/a4ec217f-9f14-7586-b422-bfeed5810dec/1.

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The overall scope of this thesis is to consider the relationship between knowledge, space and technology in the ‘knowledge economy’ by drawing upon biotechnology value chains as a case study of the knowledge economy. Central to this is the claim that although biotechnology is an internationally distributed sector, it is also concentrated in specific places because those locations provide an advantage through dynamic innovation processes. Such processes are embedded in places because those places have a particular set of knowledge inputs and provide access to other knowledge inputs outwith those places. In this sense, the knowledge economy can be seen as dependent upon different places and scales that all contribute to the innovation process and therefore necessitate relationships within and between different and diverse locations. The major contribution to knowledge that the thesis provides is the development of a new conceptual understanding of innovation processes called the knowledge-space dynamic that focuses on the knowledge and spatial features of the innovation process rather than assuming that the concentration of innovation necessarily entails specific knowledge and spatial characteristics. Consequently the thesis picks apart the current emphasis on certain types of knowledge (e.g. tacit and explicit) to explore the ways in which these are combined in the innovation process and embedded in particular places. Thus the research approach in the thesis adopts a new methdological framework to collect and analyse secondary and primary data that has not been previously undertaken. Overall the thesis conclusion is that the knowledge economy – and especially the biotech industry – may not represent the best method for regional development.
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47

Newmeyer, Luke Oliver. "Efficient FPGA SoC Processing Design for a Small UAV Radar." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7057.

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Modern radar technology relies heavily on digital signal processing. As radar technology pushes the boundaries of miniaturization, computational systems must be developed to support the processing demand. One particular application for small radar technology is in modern drone systems. Many drone applications are currently inhibited by safety concerns of autonomous vehicles navigating shared airspace. Research in radar based Detect and Avoid (DAA) attempts to address these concerns by using radar to detect nearby aircraft and choosing an alternative flight path. Implementation of radar on small Unmanned Air Vehicles (UAV), however, requires a lightweight and power efficient design. Likewise, the radar processing system must also be small and efficient. This thesis presents the design of the processing system for a small Frequency Modulated Continuous Wave (FMCW) phased array radar. The radar and processing is designed to be light-weight and low-power in order to fly onboard a UAV less than 25 kg in weight. The radar algorithms for this design include a parallelized Fast Fourier Transform (FFT), cross correlation, and beamforming. Target detection algorithms are also implemented. All of the computation is performed in real-time on a Xilinx Zynq 7010 System on Chip (SoC) processor utilizing both FPGA and CPU resources. The radar system (excluding antennas) has dimensions of 2.25 x 4 x 1.5 in3, weighs 120 g, and consumes 8 W of power of which the processing system occupies 2.6 W. The processing system performs over 652 million arithmetic operations per second and is capable of performing the full processing in real-time. The radar has also been tested in several scenarios both airborne on small UAVs as well as on the ground. Small UAVs have been detected to ranges of 350 m and larger aircraft up to 800 m. This thesis will describe the radar design architecture, the custom designed radar hardware, the FPGA based processing implementations, and conclude with an evaluation of the system's effectiveness and performance.
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48

Kao, Yu-Hsien, and 高侑賢. "Broadband Radar System in CMOS Technology." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/pkky8g.

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49

Corvelo, Rui Paulo de Morais Évora e. Resendes. "Vigilância Radar." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/89527.

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50

Hsu, Chih-Fan, and 許志釩. "A CMAC-Based Airplane Radar Recognition Technology." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/52120688334652896250.

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碩士
中華大學
電機工程學系(所)
98
Data fusion is mainly by integrating the information from a variety of sensors. It can obtain correct and useful information than by a single sensor source. In Modern high-tech electronic warfare, electronic intelligence reconnaissance systems (ELINT) and electronic support systems (ESM) are combined and used for information fusion and related decision-making. It can help gathering the information of the enemy and providing the commander to maximize the chance of win in combat. In the modern electronic warfare, radar plays a decisive role. From the radar model, parameters and information, it can determine where the characteristics of their platform and operating conditions. However, the conventional electronic intelligence reconnaissance systems (ELINT) obtain information only through a single platform, or the radar sensor to detect the sources of information. Therefore, in this thesis, a fusion of attributes is adopted for feature extraction. The experiments have shown that CMAC can proved good performance in data fusion system.
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