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Dissertations / Theses on the topic 'Frequency of collisions'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Carvajal, Alexander. "Temporal and spatial dependency of high frequency wave collisions in rat somatosensory cortex." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/A_Carvajal_062208.pdf.

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Fayed, Hassan El-Hady Hassan. "Particles and Bubbles Collisions Frequency in Homogeneous Turbulence and Applications to Minerals Flotation Machines." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/24910.

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The collisions frequency of dispersed phases (particles, droplets, bubbles) in a turbulent carrier phase is a fundamental quantity that is needed for modeling multiphase flows with applications to chemical processes, minerals flotation, food science, and many other industries. In this dissertation, numerical simulations are performed to determine collisions frequency of bi-dispersed particles (solid particles and bubbles) in homogeneous isotropic turbulence. Both direct numerical simulations (DNS) and Large Eddy simulations (LES) are conducted to determine velocity fluctuations of the carrier

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3

Bryant, Paul M. "Investigations of electropositive and electronegative RF discharges." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365857.

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4

Rivenq, Atika. "Etude de systèmes anti-collision basés sur les techniques radar pour véhicules routiers." Valenciennes, 1996. https://ged.uphf.fr/nuxeo/site/esupversions/08c0d176-22f2-43e1-9790-c2656a116cac.

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L’objectif de ce travail est de concevoir un radar anticollision micro-onde qui sera embarqué sur les véhicules pour renforcer la sécurité routière. Deux technologies radars ont été testées : le radar à impulsions et le radar à modulation de fréquence. Les deux radars sont adaptés à la détection d'obstacles, mais ne permettent pas la détection de certains intervalles de distances. La solution a été d'associer ces deux radars dans un seul ensemble que nous appelons radar bi mode. Ce dernier a été ainsi réalisé et teste avec succès en temps réel. Dans cette étude, nous nous sommes intéressés aux

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Clarke, Bryan Russell. "Frequency Modulated Continuous Waveform Radar for Collision Prevention in Large Vehicles." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14034.

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The drivers of large vehicles can have very limited visibility, which contributes to poor situation awareness and an increased risk of collision with other agents. This thesis is focused on the development of reliable sensing for this close proximity problem in large vehicles operating in harsh environmental conditions. It emphasises the use of in-depth knowledge of a sensor’s physics and performance characteristics to develop effective mathematical models for use in different mapping algorithms. An analysis of the close proximity problem and the demands it poses on sensing technologies is pre

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Mäkiharju, Simo Aleksi. "Aerosol dynamics in a turbulent jet." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1122929507.

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Pupunwiwat, Prapassara. "Tag Anti-Collision Resolution for Improved Quality of RFID Data Streams." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/367855.

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Radio Frequency Identication (RFID) is a technology that allows automatic identication of people or objects by incorporating the use of radio frequency waves to transmit data between networked electromagnetic readers and tags. RFID is considered an emerging technology for advancing a wide range of applications, such as supply chain management and distribution. However, despite the extensive development of the RFID technology in many areas, the RFID tags collision problems remain a serious issue. Collision problems occur due to the simultaneous presence of multiple numbers of tags within the re

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8

Rohatgi, Anil. "Implementation and Applications of an Anti-Collision Differential-Offset Spread Spectrum RFID System." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13946.

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This report documents the design, construction, and implementation of a differential-offset spread spectrum RFID system, to avoid the problem of anti-collision interference from multiple RFID tags. Currently in industry, this problem is handled by establishing a two way communication link between the tags and the interrogator. The proposed system eliminates the need for the excessive hardware use to create this link, and therefore drastically reduces the cost of each tag. Not only is this system cheaper to implement but it is faster, requires less power, and by the nature of the design contai

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Kamineni, Neelima. "A Study of Anti-collision Multi-tag Identification Algorithms for Passive RFID Systems." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28439/.

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The major advantages of radio frequency identification (RFID) technology over barcodes are that the RFID-tagged objects do not require to be in line-of-sight with the reader for their identification and multiple objects can be read simultaneously. But when multiple objects are read simultaneously there is always a problem of collision which reduces the efficiency of the system. This thesis presents a comprehensive study of the dynamic framed slotted ALOHA (DFSA)-based anti-collision multi-tag identification algorithms for passive RFID system. Performance of various DFSA algorithms is compared

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10

Alagappan, Azhagammai. "Studies of collisional energy transfer in the CN radical by frequency-modulated spectroscopy." Thesis, Heriot-Watt University, 2007. http://hdl.handle.net/10399/62.

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11

Killian, Thomas Charles 1969. "1S-2S spectroscopy of trapped hydrogen : the cold collision frequency shift and studies of BEC." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85260.

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Bhogal, Varun. "Analysis of BFSA Based Anti-Collision Protocol in LF, HF, and UHF RFID Environments." UNF Digital Commons, 2014. http://digitalcommons.unf.edu/etd/511.

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Over the years, RFID (radio frequency identification) technology has gained popularity in a number of applications. The decreased cost of hardware components along with the recognition and implementation of international RFID standards have led to the rise of this technology. One of the major factors associated with the implementation of RFID infrastructure is the cost of tags. Low frequency (LF) RFID tags are widely used because they are the least expensive. The drawbacks of LF RFID tags include low data rate and low range. Most studies that have been carried out focus on one frequency band o

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13

Lin, Yuan. "Bat swarming as an inspiration for multi-agent systems: predation success, active sensing, and collision avoidance." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64858.

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Many species of bats primarily use echolocation, a type of active sensing wherein bats emit ultrasonic pulses and listen to echoes, for guidance and navigation. Swarms of such bats are a unique type of multi-agent systems that feature bats's echolocation and flight behaviors. In the work of this dissertation, we used bat swarming as an inspiration for multi-agent systems to study various topics which include predation success, active sensing, and collision avoidance. To investigate the predation success, we modeled a group of bats hunting a number of collectively behaving prey. The modeling re

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Tolias, Panagiotis. "The Klimontovich description of complex plasma systems : Low frequency electrostatic modes, spectral densities of fluctuations and collision integrals." Doctoral thesis, KTH, Rymd- och plasmafysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91506.

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Plasmas seeded with solid particulates of nanometer to micron sizes (complex plasma systems) are a ubiquitous feature of intergalactic, interstellar and planetary environments but also of plasma processing applications or even fusion devices. Their novel aspects compared with ideal multi-component plasmas stem from (i) the large number of elementary charges residing on the grain surface, (ii) the variability of the charge over mass ratio of the dust component, (iii) the inherent openness and dissipative nature of such systems. Their statistical description presents a major challenge; On one

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Patra, Swadesh. "Electron Density and Electron Neutral Collision Frequency in the Ionosphere Using Plasma Impedance Probe Measurements on Sounding Rockets." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/363.

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The Plasma Impedance Probe (PIP) is an RF-instrument that is used to measure plasma electron density and electron neutral collision Frequency. Radio Frequency probe techniques for the determination of plasma parameters are attractive especially because the RF response is not susceptible to spacecraft charging problems at frequencies above the electron plasma frequency where ion sheath effects are negligible. The work done in this thesis is presented as a compendium of two papers, the first paper dealing with PIP measurements on a sounding rocket mission and the second being a qualitative study

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16

Bačík, Martin. "Simulátor funkce FM-CW dálkoměru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219875.

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This thesis describes design of Simulator FM-CW range finders. It is choosing the optimal method of realization and inform about basic properties of continuous working radar. The work includes an analysis of errors in real rangefinder and a numerical estimate of the maximum error in real devices. Contains detailed block diagram of simulator FM-CW range-finder and computer simulation of function generator frequency modulated signal, demodulator. Further work includes the complete construction documents for the preparation and implementation of basic functional verification

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Khanna, Nikita. "A Novel Update to Dynamic Q Algorithm and a Frequency-fold Analysis for Aloha-based RFID Anti-Collision Protocols." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5844.

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Radio frequency identification (RFID) systems are increasingly used for a wide range of applications from supply chain management to mobile payment systems. In a typical RFID system, there is a reader/interrogator and multiple tags/transponders, which can communicate with the reader. If more than one tag tries to communicate with the reader at the same time, a collision occurs resulting in failed communications, which becomes a significantly more important challenge as the number of tags in the environment increases. Collision reduction has been studied extensively in the literature with a var

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18

Sherrell, Ian M. "Development of a Flotation Rate Equation from First Principles under Turbulent Flow Conditions." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29943.

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A flotation model has been proposed that is applicable in a turbulent environment. It is the first turbulent model that takes into account hydrodynamics of the flotation cell as well as all relevant surface forces (van der Waals, electrostatic, and hydrophobic) by use of the Extended DLVO theory. The model includes probabilities for attachment, detachment, and froth recovery as well as a collision frequency. A review of the effects fluids have on the flotation process has also been given. This includes collision frequencies, attachment and detachment energies, and how the energies of the turbu

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Makarov, Maria. "Contribution à la modélisation et la commande robuste de robots manipulateurs à articulations flexibles. Applications à la robotique interactive." Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-00844738.

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La problématique traitée dans cette thèse concerne la commande de robots manipulateurs à articulations flexibles. Les méthodes développées visent à satisfaire les spécifications de performance et de robustesse en suivi de trajectoire, ainsi qu'à assurer un niveau de sécurité compatible avec un scénario de fonctionnement interactif dans lequel l'homme et le robot partagent un même espace de travail. Seules les mesures moteur sont utilisées dans un contexte d'instrumentation réduite. Le premier objectif de performance de la commande de mouvement est atteint grâce à l'identification expérimentale

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Sengupta, Abhinav, and Alexey Gurov. "Evaluating the effectiveness of collisionavoidance functions using state-of-the-artsimulation tools for vehicle dynamics." Thesis, KTH, Fordonsdynamik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-159262.

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The main goal of this work is to gain knowledge of how and to what extent state-of-the-artsimulation tools can be used in a conceptual development phase for vehicle dynamics control atVolvo Car Corporation (VCC).The first part of the thesis deals with an evaluation of vehicle dynamics simulation tools and theiruses. The three simulation tools selected for the study, namely Mechanical Simulation CarSim 8.2.1,IPG CarMaker 4.0.5, and VI-Grade CarRealTime V14, are briefly described and discussed. In order toevaluate and compare these tools with respect to application for vehicle dynamics control,

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Pust, Radim. "Možnosti kódového zabezpečení stanic s kmitočtovým skákáním." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233571.

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The doctoral thesis deals with design of coding for frequency hopping stations in band with intensive jamming. In digital modulations erroneous determination of the modulation state occurs due to jam at the receiver side. The result is erroneously transferred symbols of the message. Errors created during the transmission can be eliminated by using error control systems. It is also possible to prevent these errors by using algorithms (techniques) of frequency hopping which select the appropriate channel. Appropriate communication channel is a channel with a lower probability of erroneous symbol

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Waag, Austin G. "A Novel Approach to Assessing Abundance and Behavior in Summer Populations of Little Brown Myotis in Yellowstone National Park." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1543850035971551.

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23

Akkizová, Dinara. "Simulátor provozu stanic s kmitočtovým skákáním a vyhýbáním se kolizí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219000.

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The master's thesis aims to introduce and study the issue of frequency hopping with collsion avoidance (FH/CA). On this basis, design a computer program for simulating the operation of a radio systém FHCA, who works in the band used by other systems FH/CA . This simulation programm using MATLAB software to implement verify the correctness of programs. Use simulator to obtain date about the intensity of interference systems FH/CA for the chosen scenario. This work consists of five parts: the first part consists of describing the queuing system, the second part of the description of the radio fr

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Zubrvalčík, Jan. "Současný stav a směry rozvoje metod a technického zabezpečení navigace civilních letadel po ploše letiště." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443773.

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This diploma thesis deals with navigation on airport surface. In thesis there are described main surveillance systems, which are used for navigation on airport surface and systems for prediction and avoiding collisions. For all systems is listed principle of action, their usage, advantages and disadvantages and informations, which are provided by these systems. In last chapter there are compared properties of main surveillance systems.

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Černoch, Adam. "Vybrané způsoby zlepšení orientace řidiče v dopravním prostoru." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-233053.

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The aim of this thesis is to find suitable measures which will lead to the improvement of driver orientation in traffic spaceleading to lower the accident rate in the area. The theoretical part describes the traffic surveys that relate to the topic. Furthermore, the work mentioned detectors used for the implementation of automated traffic surveys. The theoretical part also describes methods that can be used to analyze the selected location and then design the ideal modification. At the end gives an overview of the various measures. In the practical part are different methodologies used for the

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Ameziane, El Hassani Chama. "Contribution à la réalisation d’un oscillateur push-push 80GHz synchronisé par un signal subharmonique pour des applications radars anticollisions." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14025/document.

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Ce travail de thèse s’inscrit dans le cadre d’un projet Français « VéLo » qui est une collaboration entre l’industriel STMicroelectronics et plusieurs laboratoires dont les laboratoires IMS-bordeaux et LAAS. Le but du projet est de concevoir un prototype de radar anticollision millimétrique. Dans ce travail un synthétiseur de fréquence est implémenté. Ce dernier sera intégré dans la chaine de réception du démonstrateur. Une étude bibliographique des architectures classiques de système de radiocommunication a été réalisée. Des exemples d’architectures rencontrées dans le domaine millimétrique o

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Cibulková, Helena. "Kolizní vývoj hlavního pásu asteroidů po dobu 4 miliard let." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-324617.

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In this work, we constructed a new model for the collisional evolution of the Main Asteroid Belt. Our goals are to test the scaling law from the work of Benz & Asphaug (1999) and ascertain if it can be used for the whole belt. We want to find initial size-frequency distributions (SFDs) for the considered six parts of the belt, and to verify if the number of asteroid families created during the simulation matches the number of observed families as well. We used new observational data from the WISE satellite (Masiero et al., 2011) to construct the observed SFDs. We simulated mutual collisions of

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Wu, Guei-Long, and 吳桂瓏. "Analysis of Frequency Collision of Frequency Hopping Communication Network." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04249314910966539781.

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碩士<br>中華科技大學<br>電子工程研究所碩士班<br>98<br>FH communications network uses the changing of FH carrier frequency to form the FH communication network, which can allow many users on line in a wide frequency band. This thesis is pertaining to the frequency hopping sequence and networking in frequency-hopping communication network (FHCN). The technology of FHCN includes frequency hopping sequences, FH networking, and FH synchronization. The touched issues are: the design of pseudo random code, performance analysis of frequency collision and the control of hopping frequency changing. The purpose is to redu

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Shaheed, Gurjeet Singh. "Investigating and modeling traffic collision frequency and possibility for Edmonton." Master's thesis, 2011. http://hdl.handle.net/10048/1812.

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This study was conducted to investigate and model the high traffic collision frequencies in the City of Edmonton, Canada. Consistent collision spikes were observed on Fridays compared to the other days of the week. The first Negative Binomial model was formulated to establish a relation between the collision frequency and the independent variables. The second Multinomial logistic regression model was formulated to examine the probability of age categories and gender involved in collision for each day of week considering collision has happened. The proposed collision prediction models were fou

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"Tag-collision resolution techniques for RFID systems." 2007. http://library.cuhk.edu.hk/record=b5893347.

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Nie, Jing.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2007.<br>Includes bibliographical references (leaves 73-77).<br>Abstracts in English and Chinese.<br>Abstract --- p.i<br>Abstract (Chinese Version) --- p.iii<br>Acknowledgement --- p.iv<br>Chapter 1 --- Introduction --- p.1<br>Chapter 2 --- Technology Overview --- p.4<br>Chapter 2.1 --- History --- p.5<br>Chapter 2.2 --- RFID Systems --- p.7<br>Chapter 2.2.1 --- Tag --- p.8<br>Chapter 2.2.2 --- Reader --- p.10<br>Chapter 2.2.3 --- Software system --- p.12<br>Chapter 2.2.4 --- Communication infrastructure --- p.13<br>Ch

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Huang, Shin Li, and 黃新立. "Analysis of Frequency Hopping Collision in Bluetooth Networks." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/09869804470869078583.

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碩士<br>義守大學<br>資訊工程學系<br>91<br>Bluetooth is an open specification for short-range wireless communication and networking, mainly intended to be a cable replacement among electronic devices, such as cellular phones, notebook computers, PDAs, and mobile devices. The key features of Bluetooth that distinguish it from other wireless standards are robustness, low power, low cost and low complexity. The Bluetooth system operates in the unlicensed 2.45 GHz ISM band, applies Frequency Hop Spread Spectrum (FHSS) over 79 carriers 1 MHz spaced and Master driven Time Division Duplex (TDD) in which each pico

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"Anti-collision techniques for RFID systems." 2006. http://library.cuhk.edu.hk/record=b5892992.

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Chiang Kong Wa.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2006.<br>Includes bibliographical references (leaves 74-79).<br>Abstracts in English and Chinese.<br>Chapter 1 --- Introduction --- p.1<br>Chapter 2 --- Technology Overview --- p.4<br>Chapter 2.1 --- Components of RFID Systems --- p.5<br>Chapter 2.1.1 --- Tag --- p.6<br>Chapter 2.1.2 --- Reader --- p.9<br>Chapter 2.1.3 --- Software systems --- p.10<br>Chapter 2.1.4 --- Communication infrastructure --- p.11<br>Chapter 2.2 --- Frequency Regulations and Standards --- p.11<br>Chapter 2.2.1 --- RFID frequency bands --- p

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"A theory of RFID anti-collision mechanisms." Thesis, 2010. http://library.cuhk.edu.hk/record=b6075265.

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Due to the recent advances in semiconductor technology, the Radio Frequency Identification (RFID) technology is approaching the critical point for inventory application in global supply chain logistics. Its unique advantage to identify multiple tags simultaneously can remove large amount of labor-intensive scanning for inventory control and checkout process. To realize multiple-tag-identification, the tag collision problem, which is due to the signal collision of simultaneous transmission by multiple tags, needs to be solved.<br>Over the years, many different RFID systems and anti-collision al

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Lin, Guan-Hung, and 林冠宏. "Study for Anti-collision of Radio Frequency Identification System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/18620088379049991465.

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碩士<br>國立成功大學<br>電信管理研究所<br>94<br>Radio frequency identification (RFID) technology is becoming increasingly attractive because of high storage capacity and reprogrammed capability. Recently, RFID systems have become very popular in many industries. For example, Wal-Mark announced that they will lead RFID systems to their business model. There is a challenge to be overcome when a reader needs to read a number of tags within the reader’s interrogation zone at the same time. However, there are very little researches about Anti-collision protocol in the RFID system at present and manufacturers don’

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Hsu, Yu-Hao, and 許祐豪. "A Frequency Synthesizer Implementation of Collision Avoidance Radar Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/21759803488381121562.

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Beidler, Craig D. "Helical ripple transport in stellarators at low collision frequency." 1987. http://catalog.hathitrust.org/api/volumes/oclc/17881319.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1987.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 246-250).

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Greig, Amelia Diane. "Pocket Rocket: An electrothermal plasma micro-thruster." Phd thesis, 2015. http://hdl.handle.net/1885/104495.

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Recently, an increase in use of micro-satellites constructed from commercial off the shelf (COTS) components has developed, to address the large costs associated with designing, testing and launching satellites. One particular type of micro-satellite of interest are CubeSats, which are modular 10 cm cubic satellites with total weight less than 1.33 kg. To assist with orbit boosting and attitude control of CubeSats, micro-propulsion systems are required, but are currently limited. A potential electrothermal plasma micro-thruster for use with CubeSats

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Ciou, Jheng-peng, and 邱振鵬. "Tag Collision Avoidance Using a Multi-Carrier Radio Frequency Identification System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/84935340277685965871.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>97<br>The present passive Radio frequency identification (RFID) system uses time division multiple access (TDMA) techniques to acquire tag identification. The tag collision problem is a major factor results in low tag identification rates. Multi-carrier RFID system incorporates the frequency division multiple access (FDMA) technique with the TDMA technique to enhance the tag read rate, in which a multiple-carrier reader can receive multiple tag backscatter signals in different frequency bands simultaneously. Due to current EPCglobal Class-1 Generation-2 (Gen2) standa

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Matout, Nagham. "Estimation of the Influence of Artificial Roadway Lighting on Road Collision Frequency." Thesis, 2013. http://spectrum.library.concordia.ca/978051/1/Matout_MASc_S2014.pdf.

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Road accidents in Quebec registered a total of 104,070 collisions with 39,541 victims of injuries and 436 fatalities in 2012 alone. Driving in dark environments increases the risk of accident likelihood for which artificial roadway lighting is typically seen as a countermeasure. However, it is unknown if non-standard levels of lighting help in reducing collision frequency, representing the case for many inconsistently illuminated roads under municipal jurisdiction. This research collected illuminance measurements for the Arthabasca region in Quebec. The collected data was combined with availab

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Lin, Zhi-chien, and 林智謙. "An Anti-collision Algorithm with Interference Cancellation in Radio Frequency Identification Systems." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/quudhj.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>95<br>In this thesis, we propose a new anti-collision algorithm: Spread Partial-Q Slot-Count (SPSC) algorithm which contains a novel multiple access method, Passive power division multiple access (Passive-PDMA) systems for Radio Frequency Identification (RIFD) systems to enhance identification rate. We use the way of “Signal Processing” and “Signal Communication” to improve the performance of the anti-collision algorithm. It has different aspects with existing anti-collision algorithms now. We observe that the throughput of the present anti-collision algorithms in RF

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Liu, Pong-Che, and 劉邦哲. "A 24-GHz Fractional-N Frequency Synthesizer and Microwave Anti-collision RADAR Module." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/59637387963302985888.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>99<br>In this thesis, a fully-integrated fractional-N synthesizer operating at 24 GHz which is fabricated in 65-nm TSMC CMOS technology has been realized. The synthesizer achieve the phase noise of -88.47 dBc/Hz at 1-MHz offset, the reference spurs of -49 dBc and the fractional spurs -50 dBc, consuming 84mW from 1.4-V supply. Utilizing a delta-sigma fractional-N synthesizer as the FMCW generator, the synthesizer linearly modulates the carrier frequency across a range of 220 MHz. Further integration has been made with the transceiver front-end as well as an FFT-based

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Li, Yi-An, and 李翼安. "A 77-GHz Fractional-N Frequency Synthesizer and Millimeter Wave Anti-collision Radar System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/73704697465833703909.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>98<br>In this thesis, a fully-integrated fractional-N synthesizer for automotive applications operating at 77 GHz has been realized. Fabricated in 65-nm CMOS technology, the synthesizer achieve the phase noise of -85.3 dBc/Hz at 1-MHz offset, the reference spurs of -55 dBc and the fractional spurs -40 dBc, consuming 73mW from 1.2-V supply. Utilizing a sigma-delta fractional-N synthesizer as the FMCW generator, the synthesizer linearly modulates the carrier frequency across a range of 700 MHz, with the RMS error less than 300 kHz. Further integration has been made wi

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Wang, Chih-Hui, and 王志揮. "Design and Implementation of Frequency Synthesizer for Millimeter Wave Automotive Collision Avoidance Radar System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/55768413899544681719.

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碩士<br>國立中興大學<br>電機工程學系所<br>102<br>In this thesis, design of signal generator in automotive collision avoidance radar system is presented. For individual circuit, we describe its structure and principles, and finally discuss the results of simulation and measurement. First, the introduction and the application of the automotive collision avoidance radar system are presented in chapter one. In chapter two, the concept of phase lock loop will be discussed in detail. We introduce principle and architecture for each circuit block respectively. In chapter three, a voltage controlled oscillation cir

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Lai, Kuei-An, and 賴奎安. "A Comparison of Integrated Regression Models for Crash Frequency, Severity and Collision Type in Freeway Contexts." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41255428000691967440.

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碩士<br>國立交通大學<br>運輸與物流管理學系<br>101<br>Crash frequency (number of crashes), severity (e.g. fatality, injury, and property damage only) and collision type (e.g. rear-end, head-on, swipe…) are three key target variables in accident analysis. Numerous studies attempted to separately or jointly model the these three target variables with various statistic methods. However, most of models ignored potential correlation of crash frequency with other variable, which led to low estimation efficiency and biased estimated parameters. In order to better capture the correlation of crash frequency with other v

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Jiang, Tzu-Yang, та 江子揚. "FMCW Vehicle Collision Warning Radar with design and Analysis of 77GHz CMOS ΔΣ Fractional-N Frequency Synthesizer". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/88682143855548067676.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>101<br>Between radio frequency radar applications, 76GHz~81GHz band has been dedicated to short range radar in Europe. Japan is also looking forward to this as well. Therefore, first of all 77GHz short range radar’s development, background and motivation will be discussed. After that, the following is specification, application, and system requirement of 77GHz car radar introduction. This kind of car radar mainly applies FMCW radar system. About FMCW radar system, there will also be a careful explanation. Besides, what the more important is how to put the theory int

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Yang, Yunqiang. "Time-resolved measurements of plasma electron number density and electron-neutral collision frequency using a microwave diagnostic method." 2004. http://etd.utk.edu/2004/YangYunqiang.pdf.

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Thesis (M.S.)--University of Tennessee, Knoxville, 2004.<br>Title from title page screen (viewed May 13, 2004). Thesis advisor: M. Mostofa Howlader. Document formatted into pages (vi, 61 p. : ill. (some col.)). Vita. Includes bibliographical references (p. 56-60).

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Lin, Jian-An, and 林建安. "Design of Broadband Image Rejection Down-Conversion Mixer and Frequency Synthesizer for 77GHz Anti-Collision Automotive Radar and SATAⅢ Applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/16591413872939486926.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>102<br>Mixers and frequency synthesizers (FS) are important circuit components in radio frequency transceivers. Broadband image rejection mixer is an crucial design issues in modern direct-down receiver. Mixers with good image rejection can avoid the image signal in-band interference in IF ports. The W-band FS correspond to new specifications of anti-collision automotive radar and EMI problems resulted from high power and high frequency clock generated by FS are urgent problems. By use of the complementary metal oxide semiconductor manufacturing process , a broadban

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Huang, Hsiang-Ting, and 黃湘婷. "Design and Analysis of W-Band Transformer-coupled Frequency Tripler and Phase-Locked Loops for Automotive Collision Avoidance and Vital Sign Detection Radar Applications." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/80881521210855019340.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>103<br>In this thesis, we present the design, analysis, and implement for three CMOS millimeter-wave integrated circuits. Including W-Band transformer-coupled frequency tripler, K-band LO generator for automotive collision avoidance and X-band phase-locked loops vital sign detection radar applications. In chapter 2, the W-band injection-locked frequency tripler using bandwidth-enhanced transformer-coupled technique is proposed. Smart cars are the future application trend, which require the internet of vehicles (IOV) and autopilot functions. Through a Marchand bal

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Lang, Sandra Marianne [Verfasser]. "Reactions of cationic gold clusters in a radio frequency ion trap under multi-collision conditions : coadsorption phenomena and activation of molecular oxygen and methane / vorgelegt von Sandra Marianne Lang." 2009. http://d-nb.info/997014911/34.

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