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Dissertations / Theses on the topic 'Frequency spectrum and efficient transmission'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Koike, Toshiaki. "Space-time-frequency signal processing for spectrum-efficient multiple-antenna wireless transmission systems." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144509.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(情報学)<br>甲第11908号<br>情博第180号<br>新制||情||40(附属図書館)<br>23688<br>UT51-2005-N742<br>京都大学大学院情報学研究科通信情報システム専攻<br>(主査)教授吉田進, 教授酒井英昭, 教授佐藤亨<br>学位規則第4条第1項該当

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2

Bury, Andreas. "Efficient multi-carrier spread spectrum transmission /." Düsseldorf : VDI-Verl, 2001. http://www.gbv.de/dms/bs/toc/339637714.pdf.

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3

Sivarajan, Kumar N. McEliece Robert J. McEliece Robert J. "Spectrum efficient frequency assignment for cellular radio /." Diss., Pasadena, Calif. : California Institute of Technology, 1990. http://resolver.caltech.edu/CaltechETD:etd-11082007-105043.

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4

Barton, Taylor Wallis. "Phase manipulation for efficient radio frequency transmission." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78474.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 109-112).<br>Power amplifiers (PAs) for microwave communications are generally the most power-hungry element of a transmitter. High linearity is required for modern digital communications standards, and often is achieved at the expense of efficiency. Outphasing architectures, which combine multiple nonlinear but efficient switching PAs into a system with an overall linear response, represent a pro

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5

Madon, Phiroz H., Shrirang Gadgil, Daniel J. Harasty, Heechang Kim, Anthony A. Triolo, and Robert A. Ziegler. "A Spectrum Management Tool to Aid Efficient Frequency Assignments at Test Ranges." International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581624.

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ITC/USA 2012 Conference Proceedings / The Forty-Eighth Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2012 / Town and Country Resort & Convention Center, San Diego, California<br>Increasing demands for telemetry bandwidth in conjunction with commercial encroachments on telemetry spectrum have created a need for test range operations personnel to make frequency assignments in the most efficient manner possible. The Spectrum Management System (SMS) project researches a potential tool to bring advanced capabilities to the assistance of test range operations

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6

Graf, Patrick Anthony. "Efficient bit encoding in backscatter wireless systems." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33946.

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As the size and power consumption of microelectronic circuits continues to decrease, passively-powered sensors promise to come to the forefront of commercial electronics. One of the most promising technologies that could realize this goal is backscatter sensing. Backscatter sensors could harvest power from and modulate data onto an impinging carrier waveform. Currently radio frequency identification (RFID) technology passively powers itself and transmits statically stored data. However, this technology has two major weaknesses: lack of resiliency against narrowband interference and slow data r

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7

El, Moutaouakkil Zakaria. "Spectrum-efficient cognitive MIMO relaying : a practical design perspective." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0092.

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Le relayage cognitif multiple-input multiple-output (MIMO) hérite l’efficacité spectrale de la radiocognitive et les systèmes de relayage MIMO, apportant ainsi des gains prometteurs en termes de débit dedonnées et de fiabilité pour les futures communications sans fil et mobiles. Dans cette thèse, nous concevons et évaluons des schémas pratiques d’émetteurs et de récepteurs pour des systèmes de relayage MIMO cognitifs qui peuvent être mis en oeuvre à moindre coût. Tout d'abord, nous réduisons l'affaiblissement du débit du mode half-duplex du relayage MIMO amplify-and-forward non-orthogonale(NAF

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8

Nilsson, Martin. "On Efficient Transmission Balancing Operation : Capturing the Normal State Frequency and Active Power Dynamics." Licentiate thesis, KTH, Elkraftteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221221.

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In an electric power system, there will always be an electric balance. Nevertheless, System Operators (SOs) often uses the term imbalance. Here, the term imbalance refers to the difference between trades and real-time measurements. This thesis defines the term imbalance and develops a framework helping SOs in finding better decisions controlling these imbalances. Imbalances are controlled by many decisions made at various stages before real-time. A decision can be to increase the flexibility in production and consumption. However, this is not the only decision affecting real-time balancing op

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9

Sen, Indranil. "Bandwidth Efficient Reduced-Complexity MT-DS-SS via Reduced Subcarrier Frequency Spacing." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1091107331.

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10

Nguyen, Tien M., Hung H. Nguyen, James Yoh, Dean J. Sklar, and Thomas Eng. "BANDWIDTH EFFICIENT MODULATION SCHEMES FOR FUTURE TT&C APPLICATIONS." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607603.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>This paper presents initial results of an investigation on bandwidth efficient waveforms for telemetry, tracking and commands (TT&C). Included in the investigation are waveforms that are currently being considered by the International Consultative Committee for Space Data Systems (CCSDS) and American Institute of Aeronautics and Astronautics (AIAA) for standards, advanced waveforms and others that have the potential to become future standards. The goal of this inv

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11

Le, Bidan Raphaël. "Turbo-equalization for bandwidth-efficient digital communications over frequency-selective channels." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0012.

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Cette thèse traite de la combinaison des fonctions d'égalisation et décodage pour les transmissions haut-débits avec modulations codées sur canaux sélectifs en fréquence. Nous considérons la Turbo-Egalisation, qui instaure un échange itératif d'information entre l'égaliseur et le décodeur. Nous étudions dans un premier temps le turbo-égaliseur reposant sur le critère maximum-a-posteriori, et montrons que ce récepteur offre des gains de performances importants en comparaison avec les récepteurs traditionnels. Nous considérons ensuite une seconde classe de turbo-égaliseurs de moindre complexité

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12

Aldrovandi, Ariele. "Design of a highly-efficient multi-frequency system for power and information transmission deploying a resonant coupling mechanism." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This thesis discusses an application of Wireless Power Transfer: it describes the design of planar coils for power and communication transmission between a BTM and an Eurobalise in a train traffic monitoring environment.

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13

Cui, Xian. "Efficient radio frequency power amplifiers for wireless communications." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195652135.

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14

吳萬雄 and Man-hung Ng. "Bandwidth-efficient pilot-symbol-aided techniques for fading estimation in multipath fading channels." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31242212.

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15

Aldosari, Mansour. "Design and analysis of green mobile communication networks." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/design-and-analysis-of-green-mobile-communication-networks(37b5278a-45da-4a81-b89c-54c7d876586a).html.

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Increasing energy consumption is a result of the rapid growth in cellular communication technologies and a massive increase in the number of mobile terminals (MTs) and communication sites. In cellular communication networks, energy efficiency (EE) and spectral efficiency (SE) are two of the most important criteria employed to evaluate the performance of networks. A compromise between these two conflicting criteria is therefore required, in order to achieve the best cellular network performance. Fractional frequency reuse (FFR), classed as either strict FFR or soft frequency reuse (SFR), is an

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16

Kim, Eung Jung. "Highly efficient supply modulator for mobile communication systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41058.

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Switching frequency modulation techniques, an inductor current sensing circuit for fast switching converter, and a dual converter are proposed, and the simulation results and experimental results are drawn. The experimental results for monotonic and pseudo-random modulation techniques show that the switching noise peak was effectively reduced as much as -19 dBc. The inductor current sensing circuit accurately tracks the output current of the switching converter that switches up to 30MHz. This current sensing circuit is used to drive the slow converter in the dual converter. The dual converter

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17

Mungara, Ratheesh Kumar. "System-level performance of interference-aware spatial frequency reuse." Doctoral thesis, Universitat Pompeu Fabra, 2016. http://hdl.handle.net/10803/400869.

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Spatial frequency reuse is a long-established approach for enhancing the capacity of wireless systems through increased spectral efficiency (bits per second per unit bandwidth). The future 5th generation of wireless systems is expected to incorporate various forms of frequency reuse. This includes multiple-input multiple-output (MIMO) communication enabling frequency reuse across antennas, device-to-device (D2D)-based densification allowing spectrum reuse across direct communication links, and full duplexing utilizing the same spectrum for communication in the transmit and receive directions.

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18

Holguín-Sánchez, Fausto Daniel. "Spectral Shape Division Multiplexing (SSDM): Apparatus, Transmitter, Receiver and Detection." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/800.

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Wireless communication companies require to use the frequency spectrum to operate. Both frequency licenses and infrastructure to reuse frequencies are costly resources subject to increasing demand. This work introduces a novel multiplexing method that saves spectrum called Spectral Shape Division Multiplexing (SSDM). Under certain configurations, SSDM displays higher flexibility and throughput than other spectrally efficient methods. SSDM defines the structure of a wireless multi-carrier by software. It is similar to Orthogonal Frequency Division Multiplexing (OFDM) in that both use overlapped

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19

Wang, Yunli. "Etude expérimentale et numérique des oscillations hydrodynamiques en milieux poreux partiellement saturés." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0127/document.

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Cette thèse vise à étudier expérimentalement, analytiquement et numériquement, les conséquences de variations et d'oscillations hydrodynamiques à forte variabilité temporelle en milieux poreux partiellement saturés. Les problèmes que nous étudions comportent des surfaces libres tant à l'extérieur qu'à l'intérieur des milieux poreux, celles-ci étant définies comme des isosurfaces de pression d'eau égale à la pression atmosphérique (Pwater = Patm). Les différentes études expérimentales réalisées en laboratoire sont, respectivement : une expérience d'imbibition dans une boite à sable avec effets

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20

Sivarajan, Kumar N. "Spectrum efficient frequency assignment for cellular radio." Thesis, 1990. https://thesis.library.caltech.edu/4463/1/Sivarajan_kn_1990.pdf.

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NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. In this thesis, we first describe some results on the following generalized chromatic number problem that has its origin in cellular radio (the frequency assignment problem with co-channel constraints only): Given a graph G with vertices V = [...] and an n-vector M = [...] of nonnegative integers (the requirement vector), find the minimum number of colors, [...](G, M), required to assign [...] distinct colors to vertex [...], [...], such that adjacent vertices are assigned disjoi

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21

Li, Ling Y. "Efficient analysis of interconnect networks with frequency dependent lossy transmission lines." 2005. http://hdl.handle.net/1993/18061.

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22

Wei-YuLin and 林韋佑. "Efficient Schemes for Channel Estimation in Single-Carrier Block Transmission with Frequency-Domain Equalization." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/80079271349324532475.

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碩士<br>國立成功大學<br>電腦與通信工程研究所<br>103<br>The Single-Carrier (SC) block transmission (BT) system enables low-complexity frequency-domain(FD) equalization, as the orthogonal frequency-division multiplexing (OFDM) system. Comparing the OFDM system, the SCBT system has much lower peak-to-average power ratio (PAPR), which is harmful to the communication system. The SC system is implemented in the uplink transmission of Long Term Evolution (LTE).In addition to low PAPR, the multipath diversity is another benefit of the SC system, while the OFDM system does not have the multipath diversity. For t

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23

Liu, Wei. "Efficient detection and scheduling for MIMO-OFDM systems." Thesis, 2012. http://hdl.handle.net/1957/34736.

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Multiple-input multiple-output (MIMO) antennas can be exploited to provide high data rate using a limited bandwidth through multiplexing gain. MIMO combined with orthogonal frequency division multiplexing (OFDM) could potentially provide high data rate and high spectral efficiency in frequency-selective fading channels. MIMO-OFDM technology has been widely employed in modern communication systems, such as Wireless Local Area Network (WLAN), Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX). However, most of the conventional schemes either are computationally

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24

Bhat, Ritesh Ashok. "Efficient, High power Precision RF and mmWave Digital Transmitter Architectures." Thesis, 2018. https://doi.org/10.7916/D8Z620XN.

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Digital transmitters offer several advantages over conventional analog transmitters such as reconfigurability, elimination of scaling-unfriendly, power hungry and bulky analog blocks and portability across technology. The rapid advancement of technology in CMOS processes also enables integration of complex digital signal processing circuitry on the same die as the digital transmitter to compensate for their non-idealities. The use of this digital assistance can, for instance, enable the use of highly efficient but nonlinear switching-class power amplifiers by compensating for their severe nonl

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25

Hsieh, Ji-Tao, and 謝季陶. "Designs of Efficient Sample Timing/Carrier Frequency Tracking Algorithms Based on a New Signal-Power Weighting Technique and an Improved Modified Golay Code Correlator for the Single-Carrier Block Transmission System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74400597279925934337.

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碩士<br>國立交通大學<br>電子研究所<br>99<br>802.15.3c is a new indoor wireless communication technique. It operates at the 60Ghz unlicensed band and provides high data rates of more than 1.5 Gbps to satisfy the command of high-speed data transmission such as high definition video stream transmission. There are two transmission modes in 802.15.3c: OFDM mode and SCBT mode. The sampling timing/carrier frequency tracking part of SCBT mode has been designed in this thesis according to the frame format and the characteristics of the channel environment at 60GHz. The main contents in this thesis are carrier frequ

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