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Dissertations / Theses on the topic 'Modified frequency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Tingyan, Yao, Zhao Weigang, and Zhang Qishan. "A MODIFIED FOUR-QUADRANT FREQUENCY DISCRIMINATOR FOR CARRIER FREQUENCY ACQUISITION OF GPS RECEIVERS." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/605031.

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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>The four-quadrant frequency discriminator (FQFD) plays an important role in GPS receivers for carrier synchronization. This paper presents a detailed study of the operating principle of the FQFD, and the acquisition performance degradation due to the gain fluctuation of the FQFD is discussed. A modified FQFD called the enveloped-four-quadrant frequency discriminator (Enveloped-FQFD) is propose

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Lopes, David Manuel Baptista. "Signal reconstruction from partial or modified linear time frequency representations." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364726.

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Mohamed, Salma Darwish Abd Elaziz. "Modified Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (MACO-OFDM) system." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25820.

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A modification to the Asymmetrically Clipped Optical OFDM (ACO-OFDM) technique, a well reported non-coherent optical implementation is proposed. A Modified ACO-OFDM (MACO-OFDM) system is developed to improve system performance at the expense of spectral efficiency. A MACO-OFDM system model is defined underpinned by a detailed mathematical framework verified through Monte Carlo simulations. System performance is compared to that of conventional ACO-OFDM. A 1.5 dB saving is achieved in the Bit Error Rate (BER) performance of 4-QAM ACO-OFDM after applying the proposed modification; the theoretica

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Qasem, Nidal. "Enhancing wireless communication system performance through modified indoor environments." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14802.

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This thesis reports the methods, the deployment strategies and the resulting system performance improvement of in-building environmental modification. With the increasing use of mobile computing devices such as PDAs, laptops, and the expansion of wireless local area networks (WLANs), there is growing interest in increasing productivity and efficiency through enhancing received signal power. This thesis proposes the deployment of waveguides consisting of frequency selective surfaces (FSSs) in indoor wireless environments and investigates their effect on radio wave propagation. The received powe

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Holroyd, Chloe. "Broadband vibrational sum frequency spectroscopy (VSFS) of modified graphene and polymeric thin films." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/broadband-vibrational-sum-frequency-spectroscopy-vsfs-of-modified-graphene-and-polymeric-thin-films(1b1abe44-8679-4384-993f-f9547f41f450).html.

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The surface-specific technique of vibrational sum frequency spectroscopy (VSFS) can provide vibrational information about chemical bonds at surfaces and interfaces. Two photons, of visible and infrared frequency, are spatially and temporally overlapped at a surface/interface to produce a photon at the sum frequency (SF) of the two input photons. As well as this process only being allowed in non-centrosymmetric media (i.e. VSFS is surface/interface specific), the SF process is enhanced when the IR beam is resonant with vibrational resonances. Broadband VSFS has been used in this project to stud

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Iyer, Karthik S. "Iterative equalization and decoding for modified D-BLAST in frequency selective MIMO channels." Ann Arbor, Mich. : ProQuest, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1432940.

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Thesis (M.S. in Electrical Engineering)--S.M.U.<br>Title from PDF title page (viewed July 9, 2007). Source: Masters Abstracts International, Volume: 44-04, page: 1928. Adviser: Dinesh Rajan. Includes bibliographical references.

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Kushwaha, Alpa. "Frequency dependent properties of modified CVD grown PbTiO₃ and La-doped PbTiO₃ thin films." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/20832.

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Li, Ying Qi Winnie. "Evaluation of a modified food frequency questionnaire to measure lignans in Australian men and women." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1665.

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Phytoestrogens are plant compounds that possess estrogenic and biological properties that have been postulated to protect against chronic diseases. Isoflavonoids and lignans are two main classes of phytoestrogen that have been investigated for their estrogenic efficacy and occurrence in the human diet. Isoflavonoids are found in soy and related products, whereas lignans are found in a wider range of plant-based foods, such as cereals, vegetables, fruits, legumes, nuts and seeds; and in beverages such as tea, coffee and wine. In Western populations with low dietary intake of soy products, compa

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Barker, Kane McKinney. "Adhesion of nano-objects to chemically modified surfaces." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31837.

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Thesis (Ph.D)--Chemistry and Biochemistry, Georgia Institute of Technology, 2010.<br>Committee Chair: Lawrence A. Bottomley; Committee Member: Aldo A. Ferri; Committee Member: Andrew Lyon; Committee Member: Jean-Luc Bredas; Committee Member: Robert L. Whetten. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Odabas, Erinc. "Predictions On Absorption And Scattering Characteristics Of Acoustic Scatterers Modified With Micro-perforated Panels." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614938/index.pdf.

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In this study, the basic absorption and scattering characteristics of acoustic scatterers, specifically Schroeder Diffusers, are investigated. Schroeder Diffusers are one of the most widely used acoustic scatterers in which the scattering phenomenon is predictable due to the geometry of the diffuser, based on a particular mathematical sequence. It is shown that it is possible to increase the amount of absorption by modifying the diffuser structure by means of adding perforated panels into the wells or narrowing diffuser wells. In room acoustics applications, diffusers are conventionally mounte

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Parthasarathy, Meghana. "Analyzing Warehouse-Retailer Interaction using a Modified Economic Order Quantity (EOQ) Model." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1103228627.

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12

Hou, Jianlin Vispoel Walter P. "Effectiveness of the hybrid Levine equipercentile and modified frequency estimation equating methods under the common-item nonequivalent groups design." Iowa City : University of Iowa, 2007. http://ir.uiowa.edu/etd/339.

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13

Gilliland, Stanley E. III. "Modified Seed Growth of Iron Oxide Nanoparticles in Benzyl Alcohol: Magnetic Nanoparticles for Radio Frequency Hyperthermia Treatment of Cancer." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3611.

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Iron oxide nanoparticles have received sustained interest for biomedical applications as synthetic approaches are continually developed for precise control of nanoparticle properties. This thesis presents an investigation of parameters in the benzyl alcohol synthesis of iron oxide nanoparticles. A modified seed growth method was designed for obtaining optimal nanoparticle properties for magnetic fluid hyperthermia. With a one or two addition process, iron oxide nanoparticles were produced with crystallite sizes ranging from 5-20 nm using only benzyl alcohol and iron precursor. The effects of r

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Hou, Jianlin. "Effectiveness of the hybrid Levine equipercentile and modified frequency estimation equating methods under the common-item nonequivalent groups design." Diss., University of Iowa, 2007. https://ir.uiowa.edu/etd/339.

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The purpose of this study was to evaluate the effectiveness of the hybrid Levine equipercentile (Hybrid LE) and modified frequency estimation (MFE) equating methods in improving accuracy of equating as compared to the percentile rank frequency estimation (FE), kernel frequency estimation (Kernel FE) and percentile rank chained equipercentile (CE) equating methods under the common-item nonequivalent groups (CINEG) design. The methods were compared under a wide variety of simulated conditions with log-linear pre-smoothing. The simulated conditions reflected differences in sample size, group prof

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Pedholla, Prashanth Kumar. "Rheological and mechanical analysis of bituminous mixtures modified with recycled crumb rubber by wet technology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Road construction and maintenance is not only expensive, but it also has a huge impact on the environment. Being context sensitive in finding the material for the asphalt pavement with a superior quality have been always a challenge. The use of recycled material might be a good solution for reducing the overall impact of the road infrastructures. This report studied the effect of using crumb rubber in the asphalt mixture. The research was based on a practical experience of using crumb rubber modified mixture in Zola Predosa, Bologna (Italy). The mixtures were also having limestone filler as

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Sucic, Victor. "Parameters selection for optimising time-frequency distributions and measurements of time-frequency characteristics of nonstationary signals." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15834/1/Victor_Sucic_Thesis.pdf.

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The quadratic class of time-frequency distributions (TFDs) forms a set of tools which allow to effectively extract important information from a nonstationary signal. To determine which TFD best represents the given signal, it is a common practice to visually compare different TFDs' time-frequency plots, and select as best the TFD with the most appealing plot. This visual comparison is not only subjective, but also difficult and unreliable especially when signal components are closely-spaced in the time-frequency plane. To objectively compare TFDs, a quantitative performance measure should be u

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Sucic, Victor. "Parameters Selection for Optimising Time-Frequency Distributions and Measurements of Time-Frequency Characteristics of Nonstationary Signals." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15834/.

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The quadratic class of time-frequency distributions (TFDs) forms a set of tools which allow to effectively extract important information from a nonstationary signal. To determine which TFD best represents the given signal, it is a common practice to visually compare different TFDs' time-frequency plots, and select as best the TFD with the most appealing plot. This visual comparison is not only subjective, but also difficult and unreliable especially when signal components are closely-spaced in the time-frequency plane. To objectively compare TFDs, a quantitative performance measure should be u

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18

Arioz, Umut. "Developing Subject-specific Frequency Lowering Algorithms With Simulated Hearing Loss For The Enhancement Of Sensorineural Hearing Loss." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614929/index.pdf.

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The hearing and understanding problems of the people with high frequency hearing loss are covered within the scope of this thesis. For overcoming these problems, two main studies, developing hearing loss simulation (HLS) and applying new frequency lowering methods (FLMs) were carried out. HLS was developed with the suprathreshold effects and new FLMs were applied with different combinations of the FLMs. For evaluating the studies, modified rhyme test (MRT) and speech intelligibility index (SII) were used as subjective and objective measures, respectively. Before both of the studies, offline st

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Ivan, Pinćjer. "Razvoj dinamičkog modela kontrole procesnih parametara postupaka rastriranja i njihov uticaj na otisak kao stimulus." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=96011&source=NDLTD&language=en.

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U disertaciji su prikazana istraživanja vezana za objektivnu i subjektivnu,psihofizičku metodu koja u eksperimentu utvrđuje koliki uticaj imaju različitiparametri rasterizacije kao i dimenzija posmatrane slike na percepcijurealističnog prikaza i zrnaste strukture uz poređenje sa objektivnim metodamaobuhvaćenim eksperimentalnim merenjima. U metodologiji istraživanja sukorišćeni uzorci rastrirani sa dva različita tipa rastera frekventnomodularni i amplitudno modularni. Poznatim i priznatim naučnim metodimaobrade podataka došlo se do relevantnih rezultata koji potvrđuju različitostposmatranih rep

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GOGI, VAMSHI KIRAN. "New Insights into Topological Phases in (Na2O)x(P2O5)100-x glasses from Enthalpy of Relaxation at Tg from Modulated-DSC and LO- and TO- mode frequency splitting from IR reflectance." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1593268824449037.

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Chaour, Issam. "Efficiency Improvement of RF Energy Transfer by a Modified Voltage Multiplier RF DC Converter." Universitätsverlag Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A33143.

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Radio Frequency (RF) energy transfer is getting increasingly importance in new generations of wireless sensor networks and this trend is tremendously supported by the modern trends to Internet of things (IoT). This promising technology enables proactive energy replenishment for wireless devices. With RF energy, transmission long distances between the energy source and the receiver can be overbridged. The main challenge thereby is the power conversion efficiency from a low level RF input power to a Direct Current (DC) voltage which is able to supply the mobile system. For this purpose, a novel

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Iaccarino, Hannah Frances. "Gamma frequency entrainment attenuates amyloid load and modifies microglia." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/109020.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Brain and Cognitive Sciences, February 2017.<br>Cataloged from PDF version of thesis. "January 2016."<br>Includes bibliographical references (pages 101-107).<br>Gamma oscillations (20-50 Hz), a common local field potential signature in many brain regions, are generated by a resonant circuit between fast-spiking (FS)-parvalbumin (PV)-interneurons and pyramidal cells. Changes in gamma oscillations have been observed in several neurological disorders. However, the relationship between gamma oscillations and cellular pathologies

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Lawrence, Emma Jane. "Identifying natural modifiers of meiotic crossover frequency in Arabidopsis thaliana." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/289733.

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During meiosis, homologous chromosomes pair and undergo reciprocal genetic exchange, producing crossovers. This generates genetic diversity and is required for balanced homolog segregation. Despite the critical functions of crossovers, their frequency and distribution varies extensively within and between species. This crossover variation can be caused by trans-modifiers within populations, which encode diffusible molecules that influence crossover formation elsewhere in the genome. This project utilised natural accessions of Arabidopsis thaliana to identify trans-modifying loci underlying cro

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Griffin, Catherine Helen. "Investigation of natural genetic modifiers of meiotic crossover frequency in Arabidopsis thaliana." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/277143.

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Meiotic recombination, known as crossover, is a vital mechanism for generating genetic diversity in sexually reproducing populations. Recombination events are non-uniform across the genome, due to a variety of influences including chromatin structure, DNA-sequence, epigenetic marks and interference from other recombination events. These known factors do not fully explain the distribution of recombination events, and additionally do not account for all the variability in recombination frequency observed both between and within species. Furthermore, of the mechanisms that have been identified, m

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Majumder, Ritwik. "Modeling, stability analysis and control of microgrid." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/37670/1/Ritwik_Majumder_Thesis.pdf.

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With the increase in the level of global warming, renewable energy based distributed generators (DGs) will increasingly play a dominant role in electricity production. Distributed generation based on solar energy (photovoltaic and solar thermal), wind, biomass, mini-hydro along with use of fuel cells and micro turbines will gain considerable momentum in the near future. A microgrid consists of clusters of load and distributed generators that operate as a single controllable system. The interconnection of the DG to the utility/grid through power electronic converters has raised concern about sa

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Gunnam, Kiran Kumar. "A DSP embedded optical naviagtion system." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969/13.

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Marocci, Francesca. "Studio sperimentale del potenziale di liquefazione e della modifica della risposta in frequenza di un sito in condizioni di liquefazione." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12466/.

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Nel seguente elaborato si effettua l’analisi di alcuni aspetti legati alla liquefazione dei terreni sabbiosi a seguito di sollecitazioni sismiche, presenti lungo il tracciato previsto per l’Autostrada regionale Cispadana che collegherà i caselli di Reggiolo-Rolo sull’A22 e quello di Ferrara Sud sull’A13. L’obiettivo principale del presente lavoro è quello di quantificare il rischio di liquefazione del sito in esame, in termini di stima del potenziale di liquefazione, e di valutare la modifica della risposta in frequenza del sito in condizioni di liquefazione. L’analisi fa riferimento ai dati

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Almeida, Filho Valdez Arag?o de. "Aplica??o de superf?cies seletivas em frequ?ncia para melhoria de resposta de arranjos de antenas planares." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15252.

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Made available in DSpace on 2014-12-17T14:55:20Z (GMT). No. of bitstreams: 1 ValdezAAF_TESE.pdf: 2001050 bytes, checksum: d0f0b88178102c3f48880303c1c6d765 (MD5) Previous issue date: 2014-03-12<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>This work aims to show how the application of frequency selective surfaces (FSS) in planar antenna arrays become an alternative to obtain desired radiation characteristics from changes in radiation parameters of the arrays, such as bandwidth, gain and directivity. In addition to analyzing these parameters is also made a study of the mutu

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Elfergani, Issa T., Abubakar S. Hussaini, Raed A. Abd-Alhameed, M. M. Abusitta, and Jonathan Rodriguez. "Modified small PIFA frequency tunable antenna." 2013. http://hdl.handle.net/10454/9645.

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No<br>This paper presents a physically compact, frequency tunable antenna design for use in mobile terminals. The full operating bandwidth is between 1750 MHz and 2400 MHz with good impedance match in the entire tuning range to meet the coverage requirements of the DCS, PCS, UMTS and WLAN bands . The antenna bandwidth is is realized by loading the embedded resonant slot of a PIFA, with a varactor diode, with an equivalent capacitance range of 0.5 pF to 2.5 pF.

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Tsai, Lin Chung, and 蔡林忠. "Instantaneous Frequency Estimation with Modified Trench's Method." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/46294972300596587372.

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碩士<br>國立中山大學<br>電機工程研究所<br>82<br>The problem of estimating the frequency content of signals is very important in many digital signal processing applications. In this thesis, we are concerned with the problem of estimat- ing and tracking the instantaneous frequency of the sinusoidal signal together with additive white noise. Its solution has im- portant applications in the fields of vibration measurements, Doppler radar returns, passive sonar systems, and formant frequency estimation

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Chou, Shao-Wen, and 周少文. "A Modified Kaczmarz Algorithm for Single-Frequency PPP." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5fraz2.

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碩士<br>國立臺灣海洋大學<br>通訊與導航工程學系<br>105<br>For the GNSS receivers, usually the least-squares algorithm is used in positioning. In this paper, a modified Kaczmarz algorithm is proposed for single-frequency Precise Point Positioning (PPP) to improve positioning accuracy. Originally, Kaczmarz algorithm is a method which could be used to find the solution of a linear equations systems. When applying the traditional Kaczmarz algorithm in PPP, we find the results are not satisfactory. Therefore, we offer a modified Kaczmarz algorithm to improve the positioning accuracy. From the results of the experiment

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Hsieh, Chung-Han, and 謝忠翰. "Modified Finite-Difference Frequency-Domain Method and Its Applications." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/36851438191431774940.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>94<br>In this thesis, we propose a modified finite-difference frequency-domain method, by taking account of the boundary condition at the interface of different media. We also extend further the formulas to overcome the numerical difficulty of a corner problem where different media are included around the corner. We use the method to simulate the extraordinary transmission phenomenon of periodic metallic structures at long wavelength and discuss its relation to surface plasmons, and other resonant modes of structure. We propose the concept of an optical switch by co

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Hsiao, Wen-Son, and 蕭萬松. "Modified Coded Frequency/Phase Modulation in the Fading Channel." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/91056602813486973416.

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碩士<br>中原大學<br>電子工程學系<br>82<br>We introduce trellis-coded modulation(TCM),used for data communication with the purpose of gaining noise immunity over uncoded transmision without altering the data rate. TCM is a combined coding and modulation scheme for improving the reliability of a digital transmission system without in increasing the transmitted power or the required bandwith. In a power-limited enviroment,the desired system performance should be achived with the smallest possible power.On

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Liang, Jiunn Bin, and 梁俊彬. "An Efficient Implementation of Modified Trench's Method for Frequency Estimation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/42364830390960580277.

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碩士<br>國立中山大學<br>電機工程研究所<br>84<br>In this thesis,an efficient way of implementing of the modified Trench's method with Bauer-Fike theorem for tracking the instantaneous frequency (IF) of the sinusoidal signal together with additive white noise is addressed. To implement the modified Trench's method with Bauer-Fike theorem in an efficient way,we first apply the Gershgorin's theorem to initially locate the upper bound of the maximum eigenvalue.This may save a lot of time during the searching o

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Chen, Li-Jing, and 陳立京. "Area Efficient Direct Digital Frequency Synthesizers using Modified Redundant CORDIC Algorithms." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/37985806052374487785.

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碩士<br>國立交通大學<br>電信工程系<br>90<br>In this thesis, we discuss the CORDIC algorithm and its applications on the direct digital frequency synthesizer (DDFS). The CORDIC algorithm is a well-known iterative method for the vector rotation computations, which can be implemented by regular shifters and adders. However, the throughput of conventional binary arithmetic CORDIC processor is limited by the carry-propagation of the adders. Recent researches have taken advantage of the carry-free characteristic of redundant number arithmetic to speed up CORDIC operations. In this thesis, we propose two efficien

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Harischandrappa, Nagendrappa. "High-frequency transformer isolated fixed-frequency DC-DC resonant power converters for alternative energy applications." Thesis, 2015. http://hdl.handle.net/1828/6456.

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The demand for power converters is on the rise due to their ability to achieve high power conversion efficiency, small size, light weight and reduced cost. DC-DC converters are used in many applications where, the output voltage needs to be regulated for wide variations in the input voltage and the load. They are also used in applications where electrical isolation is required. Power generation from renewable energy sources suffers from highly fluctuating output voltages. Electrical isolation of renewable energy sources from the grid is essential. Therefore, DC-DC converters are used as an int

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Jiang-YongCheng and 承江永. "A Modified Time-Frequency Transform and Its Application to Power Quality Signal Supervision." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/y76822.

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博士<br>國立成功大學<br>電機工程學系<br>104<br>Continuous technological advancement has enabled conventional industries to upgrade into high-tech industries. The emphasis on the quality of supplying power has hence becomes more important than ever. Therefore, this study thoroughly investigated power supply quality signals by using an improved time-frequency transform method. This study first proposed Gabor-Wigner transform to investigate high impedance fault detection. In addition to being applicable to non-stationary signals, Gabor-Wigner transform exhibited major advantages such as considerably high time-

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Kuo, Hsin-Yu, and 郭芯妤. "Modified GLRT Demodulation for OFDM Signal Transmitted Over a Frequency-Selective Fading Channel." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/40516351956000110403.

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碩士<br>國立交通大學<br>電信工程研究所<br>99<br>In this thesis, we propose the so-called Modified GLRT demodulator for combined channel estimation and data correction for OFDM signals transmitted over a frequency selective channel with unknown channel coefficients. Simulation results confirm that the Modified GLRT can achieve an evidently better performance than the traditional GLRT. In order to reduce the demodulation complexity, we further derive the recursive metric formula based on the Modified GLRT criterion for use of the priority-first search algorithm. This results in a much lower demodulation comple

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Murthy, G. S. Ramana. "Design Of Transformers And Inductors At Power-Frequency - A Modified Area-Product Method." Thesis, 1999. https://etd.iisc.ac.in/handle/2005/1641.

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Murthy, G. S. Ramana. "Design Of Transformers And Inductors At Power-Frequency - A Modified Area-Product Method." Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1641.

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KUO, HONG-JHIH, and 郭鴻志. "Carrier Frequency Offsets Estimation Based on Modified Propagator Methods for Interleaved OFDMA Uplink Systems." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5b556a.

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碩士<br>嶺東科技大學<br>資訊科技系碩士班<br>105<br>This thesis deals with simple and effective residual carrier frequency offset (CFO) estimation for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. The goal of research is proceed from the effectiveness and computational complexity of the estimator's objective function, and the computational complexity of the spectrum search. The propagator method (PM) has been dedicated to source localization which is based on the structural algebraic properties of the received data matrix. It has been shown that the PM has low computational

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Huang, Jiun Jia, and 黃俊嘉. "Modified Modulo-N-Based All Digital Frequency Synthesizer with an Arbitrary Adjustable Duty-Cycle." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/00307397119049614206.

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碩士<br>元智大學<br>通訊工程學系<br>96<br>With modulo-N arithmetic and a set of reference square waveforms, a new architecture of high-performance digital frequency synthesizer is devised, where the reference square waveforms with the same frequency but different phases are passed through a multiplexer to obtain the maximal frequency with an incrementer. A Gray encoder is designed to eliminate the glitch problem. Use frequency control word k1、k2 can synthesize arbitrary output frequency and control the duty-cycle of waveform. Pre-layout and post-layout simulation results based on the TSMC 0.18um cell-base

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蒲冠志. "A modified frequency response method for the measurement and identification of synchronous generator parameters." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/83015338867026530355.

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Jen, Chia-Chiang, and 任家強. "Experimental Study of a Modified 1x3 Frequency Re-use in a Frequency Hopping Network and GSM BSS Part Maintenance Query System Design." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/88994915902985338223.

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碩士<br>國立高雄第一科技大學<br>電腦與通訊工程所<br>93<br>Before 3G in service, GSM standard is still main stream of the mobile technologies and it is widely implemented in Taiwan. The GSM network is addressed towards a better quality and more system capacity because the number of subscribers is growing rapidly and the fierce competition between mobile phone service providers. In order to promote the quality of service, we will discuss the feature about synthesizer hopping which is provided by GSM hopping technology. In this paper,we use a modified 1x3 re-used method （M1X3）for allocating frequencies to cells and

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Qian, Jinyu. "Virtual sound localization using head related transfer functions modified in the spectral modulation frequency domain." 2005. http://proquest.umi.com/pqdweb?did=982836581&sid=38&Fmt=2&clientId=39334&RQT=309&VName=PQD.

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Thesis (Ph.D.)--State University of New York at Buffalo, 2005.<br>Title from PDF title page (viewed on Mar. 15, 2006) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Eddins, David A. Includes bibliographical references.

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Huang, Shu-Yi, and 黃舒驛. "EEG Based Motor Imagery Classification using Modified Active Segment Selection Combined with Time and Frequency Features." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/30744354986310140559.

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碩士<br>國立勤益科技大學<br>資訊工程系<br>102<br>Numerous methods for brainwave extraction and analysis have been devised and studied, in which the favorable sections of a continuous visualized EEG signal were analyzed within a fixed timeframe. The results of such method were eventually extended to practical applications; however, this fixed timeframe-based analysis is heavily reliant on the rule of thumb concept. Because the positions of EEG signals are not fixed, researchers have improved the conventional practice based on an active segment approach. The approach proposed in this study was modified based o

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Hazra, Budhaditya. "Hybrid Time and Time-Frequency Blind Source Separation Towards Ambient System Identi cation of Structures." Thesis, 2010. http://hdl.handle.net/10012/5364.

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Blind source separation methods such as independent component analysis (ICA) and second order blind identification (SOBI) have shown considerable potential in the area of ambient vibration system identification. The objective of these methods is to separate the modal responses, or sources, from the measured output responses, without the knowledge of excitation. Several frequency domain and time domain methods have been proposed and successfully implemented in the literature. Whereas frequency-domain methods pose several challenges typical of dealing with signals in the frequency-domain, popula

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See, Chan H., Raed A. Abd-Alhameed, Peter S. Excell, and Dawei Zhou. "Microscopic biological cell level model using modified finite-difference time-domain at mobile radio frequences." 2008. http://hdl.handle.net/10454/815.

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Yes<br>The potentially broad application area in engineering design using Genetic Algorithm (GA) has been widely adopted by many researchers due to its high consistency and accuracy. Presented here is the initial design of a wideband non-dispersive wire bow-tie antenna using GA for breast cancer detection applications. The ultimate goal of this design is to achieve minimal late-time ringing but at higher frequencies such as that located from 4 to 8 GHz, in which is desire to penetrate human tissue for near field imaging. Resistively loading method to reduce minimal ringing caused by the antenn

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Wen, Guo-Shuen, and 溫國舜. "Chirp characterization analysis in ultrashort pulse using frequency-resolved optical gating (FROG) and modified spectrum autointerferometric correlation (MOSAIC)." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/cs7rj9.

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碩士<br>國立臺北科技大學<br>光電工程系研究所<br>99<br>This thesis use frequency-resolved optical gating (FROG) and modified spectrum autointerferometric correlation (MOSAIC) to analyse chirp that pulse through a specific optical elements. According to the principle of FROG, we can calculate the MOSAIC envelope shapes from time delay spectrum which obtained from the experiment, and then we can get the magnitude of chirp quickly, the result we will compare with the intensity and phase that we retrieved from time delay spectrum which obtained from the experiment. In addition, we also calculate the hybrid-MOSAIC s

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Huang, Chi-chun, and 黃祺峻. "Linear LDO Regulator with Modified NMCF Frequency Compensation and Low Noise Amplifier for Neural Signal Sensing and Recording." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/57245093041258368521.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>93<br>This thesis includes two research topics. The first topic is a linear LDO regulator. The second one is a low noise amplifier (LNA). Both of the circuits can be applied to a totally implantable micro-electrical neural interfacing SOC. The linear LDO regulator is enhanced with a novel compensation technology, called modified NMCF (nested Miller compensation with feedforward Gm stage), resulting in that its performance is independent of the off-chip capacitor and its ESR (equivalent series resistor). The proposed compensation method ensures the stability of t

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