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Dissertations / Theses on the topic 'Channel tracking'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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1

Mohanty, Nirode. "Phase Tracking Error in a Fading Channel." International Foundation for Telemetering, 1987. http://hdl.handle.net/10150/615322.

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International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, California<br>The phase tracking error of the reception of a QPSK signal transmitted in a severe fading environment is derived. The phase estimate derived from the phase lock loop (PLL) will be used by a binary phase shift keying (BPSK) receiver for the recovery of the data. The resultant probability of bit error is analyzed, and is shoen to be significantly improved when the phase of the transmitted signal is tracked by a PLL separately and utilized in the coherent detection.

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2

Kho, Yau Hee. "MIMO Receiver Structures with Integrated Channel Estimation and Tracking." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/1264.

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This thesis looks at the problem of channel estimation and equalization in a multiple-input multiple-output (MIMO) dispersive fading environments. Two classes of MIMO receiver structure are proposed with integrated channel estimation and tracking. One is a symbol-by-symbol based receiver using a MIMO minimum mean square error (MMSE) decision feedback equalizer (DFE), and the other is a sequence-based receiver using a partitioned Viterbi algorithm (PVA) which approaches the performance of maximum likelihood sequence estimation (MLSE). A MIMO channel estimator capable of tracking the time and fr

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3

Mongol, Bayarpurev, Takaya Yamazato, and Masaaki Katayama. "Channel Estimation and Tracking Schemes for the Pulse-Shaping OFDM Systems." IEEE, 2009. http://hdl.handle.net/2237/13975.

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4

Tu, Chao-Cheng. "Subspace-based blind channel estimation and tracking for MIMO-OFDM systems." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=94926.

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Multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) is now widely considered as a favored technology for emerging and future generation wireless systems. MIMO-OFDM aims to achieve increased channel capacity limit by exploiting the use of multiple antennas in combination with multi-carrier orthogonal modulation. While the possibility of achieving this limit is bestowed on the invention of capacity-achieving coding and decoding techniques, in reality, this prospect relies heavily on the existence and use of advanced channel estimation techniques. To facilitate

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5

David, Radu Alin. "Improving Channel Estimation and Tracking Performance in Distributed MIMO Communication Systems." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/229.

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This dissertation develops and analyzes several techniques for improving channel estimation and tracking performance in distributed multi-input multi-output (D-MIMO) wireless communication systems. D-MIMO communication systems have been studied for the last decade and are known to offer the benefits of antenna arrays, e.g., improved range and data rates, to systems of single-antenna devices. D-MIMO communication systems are considered a promising technology for future wireless standards including advanced cellular communication systems. This dissertation considers problems related to channel e

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6

Atapattu, Lakmali Nadisha Kumari. "Channel tracking in SDMA-based multi-user MIMO-OFDM communications systems." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/65272/1/Lakmali_Atapattu_Thesis.pdf.

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Capacity of current and future high data rate wireless communications depend significantly on how well changes in the wireless channel are predicted and tracked. Generally, this can be estimated by transmitting known symbols. However, this increases overheads if the channel varies over time. Given today’s bandwidth demand and the increased necessity for mobile wireless devices, the contributions of this research are very significant. This study has developed a novel and efficient channel tracking algorithm that can recursively update the channel estimation for wireless broadband communications

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7

Gupte, Abhishek. "A Method for Tracking the Accuracy of Channel Estimates in MIMO Receivers." International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/605996.

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ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>Multiple input multiple output communication systems offer significant advantages, but only if the receiver has an accurate estimate of the channel state information (CSI). To obtain a CSI estimate, the transmitter must stop sending data, and instead send a training sequence. To maximize throughput, the time spent sending training data should be minimized. This paper describes a method which a

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8

Sung-hoon, Jang, Han Sung-hee, and Kim Heung-bum. "Auto-tracking antenna pattern effects on multipath channel model at test range." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607672.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Telemetry propagation channel is modeled to predict PCM/FM telemetry receiving signal level at APG(Anheung Proving Ground), ADD(Agency for Defense Development). Channel model is composed of direct wave and reflected wave in sea surface, so-called 2-ray model. Our 2-ray model includes transmitting antenna radiation pattern, auto-tracking antenna radiation pattern, sea surface reflection coefficient and phase depending on incident angle. Vertical and horizontal pola

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9

Champion, James. "A 3-CHANNEL MONOPULSE TRACKING RECEIVER SYSTEM USING COMMERCIAL OFF-THE-SHELF EQUIPMENT." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607375.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>Three-channel monopulse tracking receiver systems are commonly used for high performance tracking of satellites, missiles, or aircraft to maximize the reception of data. Typically, the receiver in such systems are custom designed for their end purpose. This results in a high cost to cover the development, service, and support of a highly specialized piece of equipment. This paper covers the requirements and performance of a 3-channel monopul

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10

Hayman, Rebecca. "A DSP Algorithm for Multi-Channel Maximum Power Point Tracking in Photovoltaic Systems." Honors in the Major Thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/719.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf<br>Bachelors<br>Engineering and Computer Science<br>Electrical Engineering

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11

Ehsani, Ali Reza 1963. "Design of a microprocessor based auto sun-tracking multi-channel solar radiometer system." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278092.

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A microprocessor controlled auto sun-tracking 10-channel solar radiometer system has been designed and fabricated. The instrument measurements are employed in determining the atmospheric optical depths at 10 discrete wavelengths through the visible and near IR regions. The solar radiometer consists of 10 parallel Field Of View (FOV) telescopes which are all pointed towards the sun via an active auto sun-tracking system. Each channel consists of a geometrical aperture-defined telescope, interference filter and silicon photodiode/op amp combination. The data is collected by a Data Acquisition Sy

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12

Rey, Micolau Francesc. "Feedback-Channel and adaptative mimo coded-modulations." Doctoral thesis, Universitat Politècnica de Catalunya, 2006. http://hdl.handle.net/10803/6899.

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En els sistemes de comunicacions on el transmissor disposa de certa informació sobre l'estat del canal (CSI), es possible dissenyar esquemes lineals de precodificació que assignin la potència de manera òptima induint guanys considerables, sigui en termes de capacitat, sigui en termes de la fiabilitat de l'enllaç de comunicacions. A la pràctica, aquest coneixement del canal mai és perfecte i, per tant, el senyal transmès es veurà degradat degut al desajust entre la informació que el transmissor disposi del canal i el seu estat real.<br/><br/>En aquest context, aquesta tesi estudia dos probleme

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13

Yeh, ShihYuan. "Development of a digital tracking array with single-channel RSNS and monopulse digital beamforming." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/4956.

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Approved for public release; distribution is unlimited<br>Unmanned aerial vehicles (UAVs) are widely used in military applications, and one of the most common missions is remote sensing. Remote sensing requires UAVs equipped with different kinds of sensors. Information collected by remote sensors must be transmitted back to a ground control station (GCS) to conduct analysis. The majority of UAVs are controlled directly by GCS personnel using radio frequency (RF), line-of-sight (LOS) links. The ground antenna must acquire and then track the UAV signal. A digital phased array allows signal p

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14

Sanzhong, Li, Zhang Qishan, and L. L. Cheng. "DESIGN OF A PARALLEL MULTI-CHANNEL BPSK DIRECT-SEQUENCE SPREAD-SPECTRUM RECEIVER." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/609680.

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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>A parallel multi-channel receiver for binary phase shift keyed (BPSK) direct-sequence (DS) spread-spectrum (SS) is introduced in this paper. It adopts a Costas carrier frequency-tracking loop which maintains frequency lock rather than phase lock, and the delay-lock error can be noncoherently obtained to track the PN code. For airborne applications, this method will extend effectively the receiver’s tracking dynamics range for the carrier Doppler shift. A erasable

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15

Jain, Monika. "Regularized ensemble correlation filter tracking." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/229266/1/Monika_Jain_Thesis.pdf.

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Visual Object Tracking is the task of tracking an object within a video. Broadly, most tracking algorithms can be classified into neural network based, correlation filter based, and hybrid. This thesis investigates various methods to improve tracking using correlation filters. The thesis contributes four novel trackers. The first tracker uses an appearance model pool to avoid faulty filter updates. Next, the appearance feature channel weights are learned using the graph-based similarity followed by modelling sparse spatio-temporal variations. At last, non-linearity of the appearance features i

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16

Gurel, Ilker. "Channel Estimation For Ofdm Systems." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606940/index.pdf.

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In this thesis, various pilot symbol aided channel estimation and tracking methods are investigated and their performances are compared for an OFDM system with packet based communication on HF channel. For the HF channel, Watterson HF channel model is used. The compared methods are least squares (LS) channel estimation, linear minimum mean square error (LMMSE) channel estimation, least mean squares (LMS) channel tracking, recursive least squares (RLS) channel tracking, constant position model based Kalman filter channel tracking, and constant velocity model based Kalman filter channel tracking

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17

Hankin, Barry Gwyn. "Modelling the dispersion of a passive tracer in complex open channel flows using random walk, particle tracking techniques." Thesis, Lancaster University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296886.

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18

Wu, Mingyang. "Pitch tracking and speech enhancement in noisy and reverberant environments." Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1064341479.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xvi, 149 p.; also includes graphics. Includes abstract and vita. Advisor: DeLiang Wang, Dept. of Computer and Information Science. Includes bibliographical references (p. 136-149).

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19

Jakubisin, Daniel J. "Array Processing for Mobile Wireless Communication in the 60 GHz Band." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31130.

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In 2001, the Federal Communications Commission made available a large block of spectrum known as the 60 GHz band. The 60 GHz band is attractive because it provides the opportunity of multi-Gbps data rates with unlicensed commercial use. One of the main challenges facing the use of this band is poor propagation characteristics including high path loss and strong attenuation due to oxygen absorption. Antenna arrays have been proposed as a means of combating these effects. This thesis provides an analysis of array processing for communication systems operating in the 60 GHz band. Based on measure

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20

Feldman, Chris R. "Evolutionary Genetics of Tetrodotoxin (TTX) Resistance in Snakes: Tracking a Feeding Adaptation from Populations Through Clades." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/159.

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Understanding the nature of adaptive evolution has been the recent focus of research detailing the genetic basis of adaptation and theoretical work describing the mechanics of adaptive evolution. Nevertheless, key questions regarding the process of adaptive evolution remain. Ultimately, a detailed description of the ecological context, evolutionary history, and genetic basis of adaptations is required to advance our understanding of adaptive evolution. To address some of the contemporary issues surrounding adaptive evolution, I examine phenotypic and genotypic changes in a snake feeding ada

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21

Shah, Anant Pankaj. "Development and application of a dispersed two-phase flow capability in a general multi-block Navier Stokes solver." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/36101.

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Gas turbines for military applications, when operating in harsh environments like deserts often encounter unexpected operation faults. Such performance deterioration of the gas turbine decreases the mission readiness of the Air Force and simultaneously increases the maintenance costs. Some of the major factors responsible for the reduced performance are ingestion of debris during take off and landing, distorted intake flows during low altitude maneuvers, and hot gas ingestion during artillery firing. The focus of this thesis is to study ingestion of debris; specifically sand. The region of int

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22

Stynsberg, John. "Incorporating Scene Depth in Discriminative Correlation Filters for Visual Tracking." Thesis, Linköpings universitet, Datorseende, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-153110.

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Visual tracking is a computer vision problem where the task is to follow a targetthrough a video sequence. Tracking has many important real-world applications in several fields such as autonomous vehicles and robot-vision. Since visual tracking does not assume any prior knowledge about the target, it faces different challenges such occlusion, appearance change, background clutter and scale change. In this thesis we try to improve the capabilities of tracking frameworks using discriminative correlation filters by incorporating scene depth information. We utilize scene depth information on three

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Celik, Ahmet Ozan. "Experimental Investigation of the Role of Turbulence Fluctuations on Incipient Motion of Sediment." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/28731.

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The movement of granular material along a streambed has been a challenging subject for researchers for more than a century. Predicting the limiting case of nearly zero bedload transport, usually referred to as threshold of motion or critical condition, is even more challenging due to the highly fluctuating nature of turbulent flow. Numerous works have advocated that the peak turbulent forces, randomly occurring in time and space with magnitudes higher than the average, initiate the bed material motion. More recent findings have shown that not only the magnitude of the peak turbulent forces act

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24

Shuaieb, Wafa S. A. "Radio-Location Techniques for Localization and Monitoring Applications. A study of localisation techniques, using OFDM system under adverse channel conditions and radio frequency identification for object identification and movement tracking." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/18185.

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A wide range of services and applications become possible when accurate position information for a radio terminal is available. These include: location-based services; navigation; safety and security applications. The commercial, industrial and military value of radio-location is such that considerable research effort has been directed towards developing related technologies, using satellite, cellular or local area network infrastructures or stand-alone equipment. This work studies and investigates two location techniques. The first one presents an implementation scheme for a wide

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Melle, Christophe, David Chaimbault, Fabien Peleau, and Alain Karas. "A Tri-Band L, S, C Prime Focus Feed: Concept, Design and Performance." International Foundation for Telemetering, 2013. http://hdl.handle.net/10150/579680.

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ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV<br>The flight test mission services need higher data rates due to increased system complexity and the need for more accurate, higher rate, and better data acquisition. The existing L or S band frequency spectrum allocation was a limiting factor to meet this increased data rate requirement. The World Radio-communication Conference (WRC 2007) attributed new additional frequency spectrum allocations in

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26

Kerndl, Michal. "Automatický systém pro sledování polohy pohybujících se objektů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220084.

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There is suggestion of obtaining exact position in this work, based on GPS and GSM modules controlled by PIC microcontroller. Layout of this work is electronic schematic, PCB footprint and theoretical analysis of used modules. The practical part of work is also dealing with software for both microprocessor and web interface. The function prototype will be created and tested in next phases of this project.

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Shang, Lei, and lei shang@ieee org. "Modelling of Mobile Fading Channels with Fading Mitigation Techniques." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061222.113303.

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This thesis aims to contribute to the developments of wireless communication systems. The work generally consists of three parts: the first part is a discussion on general digital communication systems, the second part focuses on wireless channel modelling and fading mitigation techniques, and in the third part we discuss the possible application of advanced digital signal processing, especially time-frequency representation and blind source separation, to wireless communication systems. The first part considers general digital communication systems which will be incorporated i

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28

Li, Weichang. "Estimation and tracking of rapidly time-varying broadband acoustic communication channels /." Cambridge, Mass. : Woods Hole, Mass. : Massachusetts Institute of Technology ; Woods Hole Oceanographic Institution, 2006. http://hdl.handle.net/1912/1509.

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Originally issued as the author's thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006.<br>"February 2006". "Doctoral dissertation." "Department of origin: Applied Ocean Physics and Engineering." "Joint Program in Oceanography/Applied Ocean Science and Engineering"--Cover. Bibliography: p. 197-206.

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Eitel, Emna [Verfasser]. "Tracking of Time-Varying Multiple Input Multiple Output Channels / Emna Eitel." München : Verlag Dr. Hut, 2014. http://d-nb.info/1047994879/34.

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Li, Weichang 1972. "Estimation and tracking of rapidly time-varying broadband acoustic communication channels." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/39205.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2006.<br>Includes bibliographical references (p. 197-206).<br>This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; limited number of degrees of freedom (DOF) due to resolvable paths and inter-path correlations; and rapid fluctuat

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31

Cohen, Tal. "A data approach to tracking and evaluating engineering changes." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17971.

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32

Segkos, Michail. "Advanced techniques to improve the performance of OFDM Wireless LAN." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FSegkos.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Applied Physics)--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): Tri T. Ha, Brett H. Borden. Includes bibliographical references (p. 107-109). Also available online.

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Harrington, Edward, and edwardharrington@homemail com au. "Aspects of Online Learning." The Australian National University. Research School of Information Sciences and Engineering, 2004. http://thesis.anu.edu.au./public/adt-ANU20060328.160810.

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Online learning algorithms have several key advantages compared to their batch learning algorithm counterparts: they are generally more memory efficient, and computationally mor efficient; they are simpler to implement; and they are able to adapt to changes where the learning model is time varying. Online algorithms because of their simplicity are very appealing to practitioners. his thesis investigates several online learning algorithms and their application. The thesis has an underlying theme of the idea of combining several simple algorithms to give better performance. In this thesis we inv

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Heusser, Peter Andreas. "Modelling and simulation of boiling channels with a general front tracking approach /." [S.l.] : [s.n.], 1996. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11736.

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Norouzi, Mehdi. "Tracking Long-Term Changes in Bridges using Multivariate Correlational Data Analysis." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416570591.

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Kaiser, Julius A., and Fredrick W. Herold. "Simultaneous Tracking of Multiple Signals Using a Thinned Array Antenna System." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606413.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Multiple same-frequency signals including direct/multipath signals are distinguished and individually tracked by measuring phase differences between sum and error channels of thinned array systems.

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Feng, Xiaoming. "On-line tracking of external topology changes using tie-line flow measurements." Ohio : Ohio University, 1986. http://www.ohiolink.edu/etd/view.cgi?ohiou1183131338.

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Wu, Yating. "Code tracking for direct-sequence spread-spectrum systems under multiuser environment and multipath fading channels /." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-ee-b30082602f.pdf.

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Thesis (Ph.D.)--City University of Hong Kong, 2009.<br>"Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 105-111)

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Lassami, Nacerredine. "Représentations parcimonieuses et analyse multidimensionnelle : méthodes aveugles et adaptatives." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2019. http://www.theses.fr/2019IMTA0139.

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Au cours de la dernière décennie, l’étude mathématique et statistique des représentations parcimonieuses de signaux et de leurs applications en traitement du signal audio, en traitement d’image, en vidéo et en séparation de sources a connu une activité intensive. Cependant, l'exploitation de la parcimonie dans des contextes de traitement multidimensionnel comme les communications numériques reste largement ouverte. Au même temps, les méthodes aveugles semblent être la réponse à énormément de problèmes rencontrés récemment par la communauté du traitement du signal et des communications numériqu

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Nandikotkur, Giridhar. "Tracking spectral changes in blazars with the energetic gamma ray experiment telescope (EGRET)." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7747.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Lami, Pietro. "Verso la convergenza tra Operational Transformation e Change Tracking." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16813/.

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In questa tesi sono state analizzate le fondamenta teoriche di Operational Transformation e Change Tracking che sono state successivamente confrontate sia teoricamente sia tramite l'implementazione e la discussione dell'editor collaborativo DOTT (Document Operational Transformation Tracking). Questa analisi è stata eseguita al fine di dimostrare che Operational Transformation e Change Tracking siano fondamentalmente modi diversi per rappresentare una stessa organizzazione dei dati basata sulla rappresentazione sequenziale delle operazioni su un documento.

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Alhakim, Rshdee. "Optimisation des performances de réseaux de capteurs dynamiques par le contrôle de synchronisation dans les systèmes ultra large bande." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENT101/document.

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Dans cette thèse nous nous sommes principalement concentrés sur les transmissions impulsion radio Ultra Large Bande (UWB-IR) qui a plusieurs avantages grâce à la nature de sa bande très large (entre 3.1GHZ et 10.6GHz) qui permet un débit élevé et une très bonne résolution temporelle. Ainsi, la très courte durée des impulsions émises assure une transmission robuste dans un canal multi-trajets dense. Enfin la faible densité spectrale de puissance du signal permet au système UWB de coexister avec les applications existantes. En raison de toutes ces caractéristiques, la technologie UWB a été consi

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Gaspar, Fontes Elaine. "Tracking the effects of limnological changes using chironomids and Chaoborus from Lake Annie, Florida." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/3333.

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Water transparency decrease and dissolved oxygen concentration are some of the limnological trends observed in Lake Annie. Chemical and physical alterations are well documented; associations between environmental variables and the aquatic biota are however unknown. The goal of this research is to assess the relationships of physical variables with chironomids and Chaoborus. During a period of one year, samples were collected every month from 2 sites, and t-tests and correlations were used to compare the assembled data. A sediment core dating back to 1938 was also analyzed for midge remains. Ch

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Smith, Dana-Jean C. "A pentadic analysis of Alaskan reality television| Tracking the changes within America's frontier myth." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527588.

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<p> Utilizing Kenneth Burke's dramatistic pentad, I argue that the rhetoric of Alaskan reality television produces a new strain of the American frontier myth wherein agents struggle to live within an omnipotent scene. After tracing the evolution of the pentadic elements in literature and film embodying the eastern and western variations of the myth, I analyze <i>Deadliest Catch, Flying Wild Alaska</i>, and <i>Gold Rush</i> and thereby discover that the discourse does not revive older versions, but instead formulates a contemporary iteration that diminishes tension between the dialectical value

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Sadowski, Pawel Grzegorz. "Dynamic LOPIT, new proteomics tool for tracking changes in sub-cellular localisation of proteins." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608797.

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Huang, Sheng-Yeh, and 黃聖曄. "Subspace-Tracking Channel Estimation for IEEE 802.11p." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9dmw83.

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碩士<br>國立交通大學<br>電子研究所<br>106<br>In this thesis, we study downlink channel estimation based on the IEEE 802.11p system designed for vehicular communications. We investigate the performance of subspace-tracking channel estimation method in a IEEE 802.11p downlink system. And we simulate the channel estimation method with MATLAB. We use subspace-tracking channel estimation method as an intermediate step after obtaining the least-squares (LS) estimate over the pilot subcarriers, whose purpose is to increase the accuracy of the estimate over the pilot subcarriers. And this preliminary estimate is

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Hsu, Yu-Hao, and 許育豪. "Aanlysis of Complex Code Tracking with Channel Estimation in Bandlimited Rayleigh Fading Channels." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/46398150184767396833.

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碩士<br>國立交通大學<br>電信工程系<br>89<br>This thesis investigates the structures and performance of coherent bandlimited digital delay-locked loops (BL-DDLL) for complex-spread direct sequence spread spectrum (DS/SS) signals in either AWGN and Rayleigh fading channels. These loops use either the pilot channel alone or the pilot channel plus other data or control channels that are separated by orthogonal Walsh channelization codes. We consider a RAKE receiver with each RAKE finger suffers from independent Jakes flat Rayleigh fading. Tracking in the presence fading necessitates an auxiliary cir

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Lin, Wen-Jun, and 林玟君. "A Rapid Channel-Tracking Structure for TH-UWB Systems over Time-Varying Multipath Channels." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/50683846754940847492.

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碩士<br>國立中正大學<br>通訊工程研究所<br>93<br>In this thesis, we will focus on the multiuser detection of UWB systems. In the multiuser transmission environment, multiple access interference (MAI) becomes a serious issue and results in the degradation of system performance. To efficiently suppress MAI, a subspace-based blind adaptive linear detector which was first proposed by H.V. Poor is chosen. Besides, since the UWB system is mainly operated in an indoor environment, it also causes a serious inter-symbol interference (ISI). Therefore, the Rake receiver is adopted in this thesis to mitigate the multipat

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Tsou, Tien-Chi, and 鄒典齊. "An Efficient Channel Tracking Method for Mobile OFDM System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/96332095128201070953.

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碩士<br>元智大學<br>通訊工程學系<br>95<br>The channel variation and Doppler Effect should be solved in a mobile communication environment. Two methods of channel estimation have been proposed from two facts in this thesis. First, an efficient channel tracking method is proposed to estimate the channel variation in the vehicle to vehicle communication environment under the IEEE 802.11p standard. Second, we proposed an iterative method which joints channel estimation and LDPC decoding by using Expectation Maximization (EM) and Sum-Product Algorithm (SPA). In our simulation that based on normalized Doppler e

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WU, CHIA-MU, and 吳珈穆. "The OFDM System with a Semi-Blind Channel Tracking Algorithm." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/54138595340853363385.

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碩士<br>國立中央大學<br>通訊工程研究所<br>96<br>To deal with the channel effect in an OFDM time-varying channel, channel tracking is an important issue. We can have two methods to solve the channel effect problem. First, we use pilots to be inserted in transmitted signals, which significantly reduce the bandwidth efficiency. Second, we use a preamble along with decision feedback methods, which has better bandwidth efficiency than the first method. However, the drawback of the latter method is the requirement of a preamble between two successive data payloads. If the length of the frame is small, the bandwidt

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