Thèses sur le sujet « RF communication systems »
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Cho, SeongHwan 1974. « Energy efficient RF communication systems for wireless microsensors ». Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29240.
Texte intégralIncludes bibliographical references (p. 131-137).
Emerging distributed wireless microsensor networks will enable the reliable and fault tolerant monitoring of the environment. Microsensors are required to operate for years from a small energy source while maintaining a reliable communication link to the base station. In order to reduce the energy consumption of the sensor network, two aspects of the system design hierarchy are explored: design of the communication protocol and implementation of the RF transmitter. In the first part of the thesis, energy efficient communication protocols for a coordinated static sensor network are proposed. A detailed communication energy model, obtained from measurements, is introduced that incorporates the non-ideal behavior of the physical layer electronics. This includes the frequency errors and start-up energy costs of the radio, which dominate energy consumption for short packet, low duty cycle communication. Using this model, various communication protocols are proposed from an energy perspective, such as MAC protocols, bandwidth allocation methods and modulation schemes. In the second part of the thesis, design methodologies for an energy efficient transmitter are presented for a low power, fast start-up and high data rate radio.
(cont.) The transmitter is based on a [Epsilon]-[Delta] fractional-N synthesizer that exploits trade-offs between the analog and digital components to reduce the power consumption. The transmitter employs closed loop direct VCO modulation for high data rate FSK modulation and a variable loop bandwidth technique to achieve fast start-up time. A prototype transmitter that demonstrates these techniques is implemented using 0.25[mu]m CMOS. The test chip achieves 20[mu]s is start-up time with an effective data rate of 2.5Mbps while consuming 22mW.
by SeongHwan Cho.
Ph.D.
An, Kyu Hwan. « CMOS RF power amplifiers for mobile wireless communications ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31717.
Texte intégralCommittee Chair: Laskar, Joy; Committee Member: Cressler, John; Committee Member: Kohl, Paul; Committee Member: Kornegay, Kevin; Committee Member: Tentzeris, Emmanouil. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Li, Kuo-Hui. « RF beamformers for high-speed wireless communications ». Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14768.
Texte intégralLópez, Méndez Joan Lluís. « Application of CMOS-MEMS integrated resonators to RF communication systems ». Doctoral thesis, Universitat Autònoma de Barcelona, 2009. http://hdl.handle.net/10803/5364.
Texte intégralAquesta tesi es centra en algunes de les aplicacions dels dispositius MEMS en el domini de RF: referències de freqüència per oscil·ladors, filtres i mescladors. Els resonadors que es presenten en aquesta tesi s'han fabricat completament en tecnologies CMOS comercials per aprofitar la integració de MEMS i circuiteria complementària i el baix cost de fabricació d'aquestes tecnologies.
Diferents tipus de ressonadors MEMS s'han dissenyat i fabricat a fi d'avaluar les seves prestacions en diferents propietats. La validesa de la tècnica emprada per fabricar els MEMS en tecnologies CMOS futures s'ha demostrat fabricant i testant amb èxit resonadors MEMS en dos tecnologies diferents: de diferents fàbriques i nodes tecnològics (0.35um i 0.18um). La freqüència de ressonància d'aquests dispositius mecànics es troben a les bandes de HF i VHF. Tots aquests dispositius basats en bigues flexurals, presenten un major factor de qualitat Q que els tancs LC integrats i són a més a més sintonizables en freqüència, amb una mida inferior a la dels citats tancs LC. Els ressonadors MEMS-CMOS descrita a la tesi presenten un valor de Qxf en el rang entre 1GHz i els 10GHz mesurats a l'aire. Aquests valors es milloren mesurant al buit arribant als 100GHz, majors a qualsevol altre ressonador basat en tecnologia CMOS.
Les aplicacions de mesclat i filtrat de senyals també s'estudien. Dins d'aquestes aplicacions, la meta és definir una banda passant plana combinant diferents ressonadors. El prototipus d'un filtre paral·lel basat en ponts i un amplificador diferencial CMOS monolític presenta una banda passant plana de 200kHz a una freqüència central de 21.66MHz quan es mesura a l'aire. També es demostra el filtrat emprant un únic ressonador del tipus tuning fork. Com a mesclador, és destacable la possibilitat de convertir a alta i baixa senyals de 1GHz amb un ressonador de 22MHz
Com a oscil·ladors monolítics, es mostra un oscil·lador operatiu per tensions DC baixes (<5V), gràcies a la reducció del gap del ressonador. L'oscil·lador basat en un tuning fork aconsegueix valors de soroll de fase de -87dBc/Hz@10kHz i -98.7dBc/Hz@100kHz, millor que altres oscil·ladors CMOS monolític reportats.
MEMS devices demonstrated a wide range of sensing and actuation applications. These mechanical elements present nowadays extension to the RF world as key elements for highly reconfigurable systems, frequency references and signal processors.
This thesis focuses on some of the applications of MEMS devices in the RF domain: frequency references for oscillators, filters and mixers. The resonators presented in this thesis are completely fabricated in commercial CMOS technologies to take profit of monolithic MEMS and complementary circuitry integration and low cost fabrication inherent of these technologies.
Several kinds of MEMS resonators (clamped-clamped beams, free-free beams and double ended tuning forks) were designed and fabricated to evaluate their performance according to different properties. Two different CMOS technologies, from two different foundries and also different technological node (0.35um and 0.18um) were successfully used to validate the monolithic fabrication approach on future CMOS technologies. The resonance frequencies of these resonators are located on the HF and VHF range. All these devices, based on flexural beams, show superior Q than integrated LC tanks and are also tunable. Moreover, their size is significatively lower than the one of the aforementioned LC tanks. The CMOS-MEMS resonators reported in this thesis show a Qxf value in the range between 1GHz and 10GHz in air and these values are further improved in vacuum up to 100GHz, higher than any other reported resonator based on CMOS technology.
Filtering and mixing applications were also studied. The goal in these applications was to define a flat band-pass combining different resonators. A prototype of parallel filter was measured using two CC-beams and a monolithic CMOS differential amplifier. The filter shows a flat bandpass up to 200kHz in air at a center frequency of 21.66MHz. Filtering with a single resonator was also demostrated with a DETF. A mixer based on a 22MHz CC-beam resonator was able to up and downconvert a signal from/to 1GHz.
Monolithic oscillators with MEMS elements as frequency references have shown oscillation with a reduced applied DC voltage (<5V) thanks to the reduction of the gap. The DETF based oscillator shows good phase noise performance of -87dBc/Hz@10kHz and -98.7dBc/Hz@100kHz better than previously reported monolithic oscillators whereas operating at a lower DC voltage.
Zou, Qiyue. « Signal processing for RF distortion compensation in wireless communication systems ». Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1693067881&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Texte intégralParikh, Hemish K. « An RF system design for an ultra wideband indoor positioning system ». Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-031108-203800/.
Texte intégralPalvai, Anoop Kumar. « Passive RF localization based on RSSI using non-linear Bayesian estimation ». Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3407.
Texte intégralVita: p. 89. Thesis director: Bijan Jabbari. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering. Title from PDF t.p. (viewed Mar. 17, 2009). Includes bibliographical references (p. 87-88). Also issued in print.
Ku, Hyunchul. « Behavioral modeling of nonlinear RF power amplifiers for digital wireless communication systems with implications for predistortion linearization systems ». Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04052004-180035/unrestricted/ku%5Fhyunchul%5F200312%5Fphd.pdf.
Texte intégralSun, Wei-Long. « Data set simulation and RF path modeling of a QPSK radio communication system ». Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2112.
Texte intégralXia, Kejun Niu Guofu. « Improved RF noise modeling for silicon-germanium heterojunction bipolar transistors ». Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Dissertations/XIA_KEJUN_35.pdf.
Texte intégralThanachayanont, Apinunt. « Continuous-time integrated filters and oscillators for IF/RF applications ». Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325356.
Texte intégralChen, Cheng. « Simultaneous transmission of baseband signal and in band RF signal ». Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708805.
Texte intégralOllars, Emil. « Design and characterization of a radio receiver for satellite communication ». Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-87007.
Texte intégralZheng, Rong. « Photonic RF signal processors ». Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2004. https://ro.ecu.edu.au/theses/812.
Texte intégralTsui, Kenneth Kin Pun. « RF characterization and modeling of MOSFET power amplifier in wireless communication / ». View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202003%20TSUI.
Texte intégralWoo, Wangmyong. « Hybrid Digital/RF Envelope Predistortion Linearization for High Power Amplifiers in Wireless Communication Systems ». Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6924.
Texte intégralShah, Alam Huhmmad. « RF modelling of deep-submicron CMOS and heterojunction bipolar transistor for wireless communication systems ». Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269173.
Texte intégralZhang, Xiuyin. « Novel RF resonators and bandpass filters for wireless communications : theory, design and application / ». access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-ee-b23750832f.pdf.
Texte intégral"Submitted to the Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 141-158)
Moon, Sung Tae. « Design of high performance frequency synthesizers in communication systems ». Texas A&M University, 2005. http://hdl.handle.net/1969.1/2329.
Texte intégralKashif, Ahsan-Ullah. « Optimization of LDMOS Transistor in Power Amplifiers for Communication Systems ». Doctoral thesis, Linköpings universitet, Halvledarmaterial, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-61599.
Texte intégralLou, Shuzuo. « Design of CMOS RF low-noise amplifiers and mixer for wireless applications / ». View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?ECED%202007%20LOU.
Texte intégralHaque, Muhammad Fahim Ul. « Pulse-Width Modulated RF Transmitters ». Doctoral thesis, Linköpings universitet, Datorteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134023.
Texte intégralMetreaud, Leon T. « An RF-isolated real-time multipath testbed for performance analysis of WLANs ». Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-082206-234807/.
Texte intégralZheng, Guizhen. « Low power reconfigurable microwave circuits using RF MEMS switches for wireless systems ». Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-05242005-135940/.
Texte intégralJohn Papapolymerou, Committee Chair ; Joy Laskar, Committee Member ; John Cressler, Committee Member ; Alan Doolittle, Committee Member ; Clifford Henderson, Committee Member.
Qureshi, Abdul Qader Ahsan. « Multilayer Micromachined RF MEMS Filters at Ka and L/S Band For On-Board Satellite Communication Systems ». Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368469.
Texte intégralQureshi, Abdul Qader Ahsan. « Multilayer Micromachined RF MEMS Filters at Ka and L/S Band For On-Board Satellite Communication Systems ». Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1018/1/AQAhsan-PhD-Thesis-updated-version-18-12-2013.pdf.
Texte intégralWoo, Sang Hyun. « Low noise RF CMOS receiver integrated circuits ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50127.
Texte intégralChen, Chih-Hung Deen M. Jamal. « Noise characterization and modeling of MOSFETs for RF IC applications / ». *McMaster only, 2002.
Trouver le texte intégralCresci, David John. « On-wafer characterization of ground vias in multilayer FR-4 printed circuit boards at RF/microwave frequencies ». Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15806.
Texte intégralMorris, Matthew Leon. « The Impact of Antenna and RF System Characteristics on MIMO System Capacity ». Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd978.pdf.
Texte intégralPatterson, Chad E. « Exploration of liquid crystal polymer packaging techniques for rf wireless systems ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44800.
Texte intégralDevarakond, Shyam Kumar. « Signature driven low cost test, diagnosis and tuning of wireless systems ». Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47594.
Texte intégralGoyal, Abhilash. « Methodologies for low-cost testing and self-healing of rf systems ». Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44705.
Texte intégralCarlowitz, Christian, Thomas Girg, Hatem Ghaleb et Xuan-Quang Du. « Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS) ». De Gruyter, 2017. https://tud.qucosa.de/id/qucosa%3A38596.
Texte intégralZheng, Guizhen. « Low Power Reconfigurable Microwave Circuts Using RF MEMS Switches for Wireless Systems ». Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11656.
Texte intégralCui, Yan Niu Guofu. « High frequency noise modeling and microscopic noise simulation for SiGe HBT and RF CMOS ». Auburn, Ala., 2006. http://repo.lib.auburn.edu/Send%2012-15-07/CUI_YAN_8.pdf.
Texte intégralSonalkar, Prachi Santosh. « Development of an Implantable Data Acquisition System ». See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2005. http://www.ohiolink.edu/etd/view.cgi?toledo1122671274.
Texte intégralTypescript. "A thesis [submitted] as partial fulfillment of the requirements of the Master of Science degree in Bioengineering." Bibliography: leaves 73-75.
Chung, David. « Development of system level integration of compact RF components on multilayer liquid crystal polymer (LCP) ». Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42763.
Texte intégralIyer, Gopal Balakrishnan. « Digital communication and control circuits for 60ghz fully integrated CMOS digital radio ». Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39589.
Texte intégralCook, Benjamin Stassen. « Vertical integration of inkjet-printed RF circuits and systems (VIPRE) for wireless sensing and inter/intra-chip communication applications ». Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51844.
Texte intégralPelteku, Altin E. « Adaptive Suppression of Interfering Signals in Communication Systems ». Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/138.
Texte intégralVenugopalan, Nair Jalajakumari Aravind. « Power and spectrally efficient integrated high-speed LED drivers for visible light communication ». Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/28995.
Texte intégralSrirattana, Nuttapong. « High-Efficiency Linear RF Power Amplifiers Development ». Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6899.
Texte intégralAndraud, Martin. « Solutions pour l'auto-adaptation des systèmes sans fil ». Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT037/document.
Texte intégralThe current demand on ubiquitous connectivity imposes stringent requirements on the fabrication of Radio-Frequency (RF) circuits. Designs are consequently transferred to the most advanced CMOS technologies that were initially introduced to improve digital performance. In addition, as technology scales down, RF circuits are more and more susceptible to a lot of variations during their lifetime, as manufacturing process variability, temperature, environmental conditions, aging… As a result, the usual worst-case circuit design is leading to sub-optimal conditions, in terms of power and/or performance most of the time for the circuit. In order to counteract these variations, increasing the performances and also reduce power consumption, adaptation strategies must be put in place.More importantly, the fabrication process introduces more and more performance variability, which can have a dramatic impact on the fabrication yield. That is why RF designs are not easily fabricated in the most advanced CMOS technologies, as 32nm or 22nm nodes for instance. In this context, the performances of RF circuits need to be calibrated after fabrication so as to take these variations into account and recover yield loss.This thesis work is presenting on a post-fabrication calibration technique for RF circuits. This technique is performed during production testing with minimum extra cost, which is critical since the cost of test can be comparable to the cost of fabrication concerning RF circuits and cannot be further raised. Calibration is enabled by equipping the circuit with tuning knobs and sensors. Optimal tuning knob identification is achieved in one-shot based on a single test step that involves measuring the sensor outputs once. For this purpose, we rely on variation-aware sensors which provide measurements that remain invariant under tuning knob changes. As an auxiliary benefit, the variation-aware sensors are non-intrusive and totally transparent to the circuit.Our proposed methodology has first been demonstrated with simulation data with an RF power amplifier as a case study. Afterwards, a silicon demonstrator has then been fabricated in a 65nm technology in order to fully demonstrate the methodology. The fabricated dataset of circuits is extracted from typical and corner wafers. This feature is very important since corner circuits are the worst design cases and therefore the most difficult to calibrate. In our case, corner circuits represent more than the two third of the overall dataset and the calibration can still be proven. In details, fabrication yield based on 3 sigma performance specifications is increased from 21% to 93%. This is a major performance of the technique, knowing that worst case circuits are very rare in industrial fabrication
Hamilton, Benjamin Russell. « Applications of bayesian filtering in wireless networks : clock synchronization, localization, and rf tomography ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44707.
Texte intégralKhlif, Wassim. « Design of Tunable Low-Noise Amplifier in 0.13um CMOS Technology for Multistandard RF Transceivers ». Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-theses/714.
Texte intégralBushyager, Nathan Adam. « Novel adaptive time-domain techniques for the modeling and design of complex RF and wireless structures ». Diss., Available online, Georgia Institute of Technology, 2005, 2004. http://etd.gatech.edu/theses/available/etd-11182004-145238/.
Texte intégralTentzeris, Manos, Committee Chair ; Laskar, Joy, Committee Member ; Peterson, Andrew, Committee Member ; Papapolymerou, Ioannis, Committee Member ; Sotiropoulos, Fotis, Committee Member. Vita. Includes bibliographical references.
Cha, Jeongwon. « A CMOS radio-frequency front-end for multi-standard wireless communications ». Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37250.
Texte intégralKok, Wing Hang (Ronald). « Development of a wireless MEMS inertial system for health monitoring of structures ». Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-11244-122741/.
Texte intégralKeywords: angular rate; cantilever; wireless; RF; microcontroller; tilt and rotation; health monitoring; inertial sensors; MEMS. Includes bibliographical references (p. 139-145).
Rida, Amin Hassan. « Integrated RF modules and passives on low-cost flexible materials for applications up to the mm-wave frequency range ». Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39552.
Texte intégral