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Relevant bibliographies by topics / Frequency demodulation / Dissertations / Theses

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Dissertations / Theses on the topic 'Frequency demodulation'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Cronin, Christopher Joseph. "Digital frequency demodulation for a laser vibrometer." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11102009-020344/.

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2

Brooks, Lane Gearle 1975. "Amplitude and frequency demodulation controller for MEMS accelerometer." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8938.

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Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (p. 121-122).<br>Draper Laboratory is developing a high precision MEMS accelerometer. This thesis describes and analyzes the electronics which produce the acceleration estimate and control the actuators within the sensor. The Vector Readout method of amplitude and frequency demodulation is described and shown to be a high precision, environmentally stable method of demodulation. The Vector Readout method of demodulation uses a Hilbe

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3

Bishop, Daniel W. "GMSK Demodulation Methods and Comparisons." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216081075.

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4

Watson, Stephen M. "Frequency demodulation in the presence of multiplicative speckle noise." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246382.

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5

Lin, Chun-Ching. "Demodulation of Narrowband Radio Frequency Signals by Aliasing Sampling." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/5286.

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The objective of this thesis is to study the demodulation of narrowband radio frequency signals by aliasing sampling in order to reduce the sampling rate. The spectrum can be recreated at the lower frequency position by aliasing sampling. However, if the sampling rate is deviated from the desired one, error will occur. The sensitivity to the frequency error of aliasing sampling is studied. One main reason of the deviation of the sampling rate is the frequency drifting of the local oscillator. Being able to compensate the oscillator drifting errors inexpensively, automatic frequency control (AF

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6

Gibbs, Jonathan Alastair. "Techniques for the synchronisation and demodulation of fast frequency hopped M-ary frequency shift keying." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293202.

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7

Ndovi, Lusungu. "Benefits to processor load for quadrature baseband versus radio frequency demodulation algorithms." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1946.

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8

Yang, Runfeng. "Multiband orthogonal frequency division multiplexing modulation and demodulation for wireless universal serial bus." Thesis, University of Reading, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499368.

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Wireless Universal Serial Bus (W-USB) has been proposed to offer a mechanism in short range and high speed Wireless Personal Area Networks (WPAN). Wireless USB has now been standardized by utilizing the common WiMedia Ultra Wideband (UWB) radio platform to use the services of Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) as the transport mechanism. With regards to the high data rate mode using DCM modulation scheme, different DCM demapping methods resulting in different system performance are presented, which include soft bit demapping, Maximum Likelihood (ML) soft bit demappi

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9

Peng, Song, Zhang XiaoLin, Cao Xue, and Qi Xia. "THE APPLICATION OF DIGITAL DEMODULATION TECHNIQUE FOR FREQUENCY MODULATION SIGNAL IN TELEMETRY RECEIVER." International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/604956.

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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California<br>Combined with an example of digital telemetry receiver design, this paper mainly discusses the application of software radio in telemetry receiver. The paper begins with an introduction of applying high efficiency digital filter and math analysis in quadrature digital frequency modulation and demodulation to digital frequency conversion technique. Next, Simulink/Matlab is used to simulate digital telemetry receiver. The method of simulation, analysis and calculation of perf

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10

Raghu, Swathi. "Combinatorial Modulation and Coherent Demodulation of Bi-orthogonal M-ary Frequency Shift Keying." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1449108844.

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11

Wu, Nan. "Optical Frequency Domain Reflectometry Based Quasi-distributed High Temperature Sensor." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/76905.

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Temperature sensing in harsh environment is desired in many areas, such as coal gasification, aerospace, etc. Single crystal sapphire is an excellent candidate for construction of harsh environment sensors due to its superior mechanical and optical properties even at temperature beyond 1600°C. The temperature inside a coal gasifier can be as high as 1200°C. And there is dramatic temperature gradient between the inner and outer layers of the gasifier refractory. Previous work has been done at Virginia Tech's Center for Photonics Technology to design and fabricate a sapphire wafer based Fabry-Pe

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12

Culha, Onur. "Noncoherent Differential Demodulation Of Cpm Signals With Joint Frequency Offset And Symbol Timing Estimation." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613729/index.pdf.

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In this thesis, noncoherent differential demodulation of CPM signals with joint carrier frequency offset and symbol timing estimation is investigated. CPM is very attractive for wireless communications owing to major properties: good spectral efficiency and a constant envelope property. In order to demodulate the received CPM signal differentially, the symbol timing and the carrier frequency offset have to be estimated accurately. There are numerous methods developed for the purpose. However, we have not encountered studies (which are based on autocorrelation estimation and hence suitable for

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13

Lam, Chan-Tong. "Multi-frequency estimation algorithm for group demodulation of preamble-less NCBFSK modulated short burst messages." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/MQ53002.pdf.

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14

Cirineo, Tony, and Bob Troublefield. "STANDARD INTEROPERABLE DATALINK SYSTEM, ENGINEERING DEVELOPMENT MODEL." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608398.

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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada<br>This paper describes an Engineering Development Model (EDM) for the Standard Interoperable Datalink System (SIDS). This EDM represents an attempt to design and build a programmable system that can be used to test and evaluate various aspects of a modern digital datalink. First, an investigation was started of commercial wireless components and standards that could be used to construct the SIDS datalink. This investigation lead to the construction of an engineering develop

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15

LaCasse, Charles. "Modulated Imaging Polarimetry." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/247279.

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In this work, image processing algorithms are presented for an advanced sensor classification known collectively as imaging modulated polarimetry. The image processing algorithms presented are novel in that they use frequency domain based approaches, in comparison to the data domain based approaches that all previous algorithms have employed. Under the conditions on the data and imaging device derived in this work, the frequency domain based demodulation algorithms will optimally reduced reconstruction artifacts in a least squared sense. This work provides a framework for objectively compari

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16

Firla, Marcin. "Automatic signal processing for wind turbine condition monitoring. Time-frequency cropping, kinematic association, and all-sideband demodulation." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT006/document.

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Cette thèse propose trois méthodes de traitement du signal orientées vers la surveillance d’état et le diagnostic. Les techniques proposées sont surtout adaptées pour la surveillance d’état, effectuée à la base de vibrations, des machines tournantes qui fonctionnent dans des conditions d’opération non-stationnaires comme par exemple les éoliennes mais elles ne sont pas limitées à un tel usage. Toutes les méthodes proposées sont des algorithmes automatiques et gérés par les données.La première technique proposée permet de sélectionner la partie la plus stationnaire d’un signal en cadrant la rep

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17

Campbell, Robert F. "Analysis of Various Algorithmic approaches to Software-Based 1200 Baud Audio Frequency Shift Keying Demodulation for APRS." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1634.

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Digital communications continues to be a relevant Field of study as new technologies appear and old methodologies get revisited or renovated. The goal of this research is to look into the old digital communication scheme of Bell 202 [67] used by APRS and improve software based demodulation performance. Improved performance is defined by being able to correctly decode more packets in an efficient, real time, manner. Most APRS demodulation is currently done using specialized hardware since that yields the best performance. This research shows that through using Sivan Toledo's javAX25 [72] softwa

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18

Hordeski, Theodore J. Jr. "TUNABLE FSK/AM SIGNAL DETECTOR ON A 6U-VME CARD." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/609677.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>The telemetry and aerospace communities require communications equipment providing various modulation and demodulation formats. One format, with application in Space Ground Link Subsystems (SGLS), utilizes a Ternary (tri-tone) Frequency Shift-Keyed (FSK) signal Amplitude Modulated (AM) by a triangle waveform. Historically, SGLS equipment has operated with a fixed tri-tone frequency set (e.g., 65 kHz, 76 kHz and 95 kHz). The need for additional tr

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19

Marzolini, Remo G. A. "Demodulator techniques in satellite communications systems for direct broadcast systems." n.p, 1995. http://ethos.bl.uk/.

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20

M, M. Galib Asadullah. "Robust wireless communications under co-channel interference and jamming." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22571.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Gordon L. Stuber; Committee Member: Alfred D. Andrew; Committee Member: John A. Buck; Committee Member: Steven W. McLaughlin; Committee Member: Ye (Geoffrey) Li.

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21

Acharya, Gyanu R. "Electroconvection and Pattern Formation in Nematic Liquid Crystals." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1239804049.

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22

Monica, G. Della, and E. Tonello. "NEW GENERATION COMMAND RECEIVER FOR SATELLITE USING BENEFITS OF DIGITAL PROCESSING." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607344.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>Presentation of Alcatel Espace last studies and developments regarding TT&C receiver Products for satellite. This document lays on 3 parts: · a technical point of view showing digital demodulation principles used (base band recovery, analytical head, PM or FM demodulation) and their related offered possibilities(digital controlling loop, lock status detection, jammer detection,....) · a technology/design description · a synthesis showing pe

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23

Laha, Soumyasanta. "Analysis & Design of Radio Frequency Wireless Communication Integrated Circuits with Nanoscale Double Gate MOSFETs." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1418730974.

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24

Povalač, Aleš. "Řídicí mikroprocesorový systém s kmitočtovým syntezátorem pro KV radiostanici." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218031.

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The thesis is focused on the development of a radioamateur short-wave transceiver. The basic functions, features and parameters are described in the introduction. The bandplan and appropriate types of emission are also included in the introductory part. The frequency synthesis module is discussed in the second part of the document. Emphasis is placed on the direct digital synthesis method (DDS) using modern Analog Devices circuits. The proposed DDS module includes a high-speed clock source. The description of an intermediate frequency module with a demodulator is also placed there. The final p

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Shaddock, Daniel Anthony, and Daniel Shaddock@jpl nasa gov. "Advanced Interferometry for Gravitational Wave Detection." The Australian National University. Faculty of Science, 2001. http://thesis.anu.edu.au./public/adt-ANU20020227.171850.

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In this thesis we investigate advanced techniques for the readout and control of various interferometers. In particular, we present experimental investigations of interferometer configurations and control techniques to be used in second generation interferometric gravitational wave detectors. We also present a new technique, tilt locking, for the readout and control of optical interferometers. ¶ We report the first experimental demonstration of a Sagnac interferometer with resonant sideband extraction (RSE). We measure the frequency response to modulation of the length of the arms and demonstr

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26

Shaw, Michael D. (Michael David) Carleton University Dissertation Engineering Electrical. "A block demodulator for frequency division multiplexed NCFSK signals." Ottawa, 1987.

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27

Harrington, Riley T. "Frequency shift keying demodulators for low-power FPGA applications." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/35101.

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Master of Science<br>Department of Electrical and Computer Engineering<br>Dwight D. Day<br>Low-power systems implemented on Field Programmable Gate Arrays (FPGA) have become more practical with advancements leading to decreases in FPGA power consumption, physical size, and cost. In systems that may need to operate for an extended time independent of a central power source, low-power FPGA’s are now a reasonable option. Combined with research into energy harvesting solutions, a FPGA-based system could operate independently indefinitely and be cost effective. Four simple demodulator designs were

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28

Murray, Terrence J. "Four frequency-shift keying (4-FSK) spread spectrum modulator and demodulator." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA267433.

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29

Cope, Michael K. "Design, simulation, and implementation of a digital quadrature demodulator for a stepped frequency radar." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/10291.

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Includes bibliographical references.<br>The scope of this thesis project is the design and implementation of a digital quadrature demodulator for a stepped frequency ground penetrating radar. This dissertation presents a theoretical model of the demodulator, simulations characterising the demodulator performance as well as the design, construction, and measurement of the prototype demodulator. The demodulator estimates the amplitude and phase of the intermediate frequency signal of a time-interleaved dual-channel heterodyne radar receiver. A demodulator model is developed from a survey of the

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30

Figueredo, Caio Gomes de. "Full digital BPSK demodulator with supressed carrier for satellite telecommand channel applications." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16729.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>This work presents a new structure for an all-digital BPSK demodulator developed for space communications that performs simultaneously the sampling and down-conversion of the the intermediate frequency signal to the baseband signal. The most important aspect of this work is the design of a new interpolator to retrieve lost samples during the down conversion process, and also to simplify the demodulator implementation. This interpolator correlates the samples of the output signal in such way that it was necessary to design a optimum

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31

Dubbert, Dale F. "The RMS phase error of a phase-locked loop FM demodulator for standard NTSC video." Thesis, Kansas State University, 1986. http://hdl.handle.net/2097/9911.

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Yagüe, Edgar Cámara, and José Manuel Menéndez Carretero. "Transparent Satellite Switching using Flexible Frequency-band Reallocation." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6856.

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<p>The society expects a global interconected digital communication system offering multimedia services, information on demand and interchange of information with a high data rates and low cost. </p><p>All this can not be realized with the terrestrial nets used nowadays cause it is necessary a high economic inversion to get a competitive capacity to interchange information between server and user. The next generation of satellite must have characteristics which improve the current generation, one important requirement is that the same satellite could make a treatment of the different input si

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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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Kroupa, Martin. "Analýza změny zátěže asynchronního motoru z měření statorových proudů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221189.

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This thesis is focused on the evaluation of rotor dynamics of the induction machine, which can be used as a basis for online diagnosis of driven load in the future. It describes the problem of time varying loading torque at its impact to electromagnetic variables in induction machine. Followed by the possible ways of monitoring and diagnostic of loading torque using Fourier analysis on supply current.

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

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

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Дубицька, Марія Сергіївна, Мария Сергеевна Дубицкая та M. S. Dubyts’ka. "Вдосконалення способу прогнозу диз’юнктивних порушень методом акустичної геолокації при відпрацюванні пологозалягаючих вугільних пластів". Thesis, Видавництво НГУ, 2014. http://ir.nmu.org.ua/handle/123456789/3692.

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У дисертації вирішене актуальне науково-технічне завдання підвищення ефективності прогнозу мілкоамплітудних геологічних порушень вугільних пластів методом неруйнівного контролю до 95%. Запропонована і обґрунтована математична модель розповсюдження акустичного хвильового пакету в дисперсійному породному середовищі, заснована на інформаційній амплітудно-фазовій модуляції несучих частот зондуючого сигналу. Розроблено ефективний спосіб прогнозу прихованих диз'юнктивів у вугільних пластах методом неруйнівного контролю. У його основу покладено аналіз особливостей прояву розривних геологічни

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Juřica, Lukáš. "Automatické měření odstupu motorových vozidel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218403.

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This work deals with evaluation of equipment used for non-contact measurement of distance between vehicles. First are discussed various principles of measuring and after the selection of the most appropriate solution is proposed a detailed block diagram of modulation, demodulation and evaluation of the whole system and its mathematical description. Another part is devoted to describing the activities of the microprocessor controller, with which is controlled evaluation part and to the control program. It also analyzes the maximal attainable accuracy of measurement and the errors that affect it

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Martinec, Matěj. "Modulátor a demodulátor pro mikrovlnný spoj." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221252.

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This work is dealing with the design of intermediate part of transmitter and reciever that use digital BPSK and QPSK modulations for microwave link that works in 24 – 26 GHz bands. Besides choosing the suitable modulator and demodulator there was need to provide proper connection of this part with transceiver Nortel CTR26-01M. Input and output of this intermediate part was take out to baseband, where was need to ensure the transfer of diferential inputs of modulator and demodulator to symetric leading for reason of data communication with PC, for which was created the algorithms to provide tra

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Huang, Guan-Ying, and 黃冠穎. "Real time baseband orthogonal frequency division multiplexing demodulation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/45739234969791962374.

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碩士<br>國立交通大學<br>光電工程學系<br>100<br>Due to immunity to delay spread and multipath, resistance to frequency select fading and efficient bandwidth usage, OFDM (Orthogonal Frequency Division Multiplexing) techniques are taken seriously in recent years. However, most of these researches are demonstrated by offline processing which doesn’t allow long-term performance verification and also doesn't consider the limitation of practical hardware. Therefore, evaluating real-time OFDM algorithm is necessary for validating its feasibility in practical. implementation. In this work, we have realized a 157.5

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Chen, William, and 陳廣鈺. "Self-Injection-Locked Radar Using PLL-based Frequency Demodulation Technique." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/92czzp.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>107<br>In this thesis, the signal demodulation mechanism of self-injection-locked radar (SIL RADAR) is studied. The usage of Phase-Locked Loop(PLL) is implemented for frequency demodulation in order to combine with SIL RADAR to realize wireless physiological signal sensing. Compared with the previous researches using IQ de-modulation for SIL radar, a delay unit is needed in those architectures, the PLL-based frequency demodulation technique has the advantages of IC implementability. This thesis is divided into three parts, the first part is research motivation and

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LEE, CHANG-SHUI, and 李長水. "A Study on the Demodulation of Non-Synchronized Frequency Hopping Signals." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/15895733066894028455.

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碩士<br>國防大學中正理工學院<br>電子工程研究所<br>94<br>Frequency Hopping (FH) is an important technique in secret communication of military usage. The electronic counter technologies for FH communications are also vital. To grasp enemy's communication machine parameters will contribute to our jamming and electron counter mission efficiently. There is also great benefit of military intelligence collection if we could recover the messages or audio of the transmitted signal. However, most of the published researches just focus on the applications and the inherent merits of the FH communications. The studies of cou

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TSAI, CHUNG-MING, and 蔡中銘. "Wind Turbine Gearbox Fault Diagnosis by using High Frequency Demodulation Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/m99ncx.

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碩士<br>南臺科技大學<br>機械工程系<br>106<br>The wind turbines gearbox failure has big impact to the turbine operation. In order to avoid gearbox failure and the induced turbine stop, prognosis and monitoring technologies have been developed and deeply researched for the wind turbine. There are many strategies to diagnose the gear vibration signal. The traditional method is with a relative low frequency sampling and then generally using Fourier, Hilbert, Wavelet transform as the analyzing tools. But these low frequency methods are easily influenced by external noise and thus mixed up with the original dama

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Yeh, Yu-Ching, and 葉又菁. "PSK Modulation/Demodulation Circuits and Frequency Synthesizer for mm-Wave Wireless Communication." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/71217059283073292684.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>99<br>In this thesis, four circuit systems which can be applied to mm-wave wireless communication are demonstrated. It includes a 5-Gb/s data rate and 5-GHz carrier rate differential binary phase-shift keying (DBPSK) modulator/demodulator set, a 40-GHz frequency synthesizer, and two W-band wireless transceivers. One of the transceivers utilizes binary phase-shift keying (BPSK) modulation and its carrier frequency is 84 GHz and the other extends to quadrature phase-shift keying (QPSK) modulation at 87 GHz. The 5-Gb/s data rate and 5-GHz carrier rate DBPSK modulator

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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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Kandukuri, Ajay. "Non-data aided parametric based carrier frequency estimators for bursty GMSK communication systems." Thesis, 2003. http://hdl.handle.net/1957/29876.

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Estimating the carrier frequency from a modulated waveform is one of the most important functions of a coherent signal receiver. Good performance and low bit error rates are obtained by coherent demodulation. Therefore, exact knowledge of the received signal carrier frequency is critical for communication systems. Also due to the spectral crowding, a high probability of channel interference can be observed. Under moderate carrier frequency offsets, data-aided estimators have been developed which have a high accuracy of estimation. However, for high frequency offsets the frequency estimator doe

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ZHANG, YU-MING, and 張育銘. "The Application of OSC-ANF in Non-Coherent Demodulation of M-ary Continuously Frequency Modulated Signals." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fj94hw.

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碩士<br>逢甲大學<br>通訊工程學系<br>107<br>FSK (frequency-shift keying) modulation is a commonly used digital signal transmission method. It is also a conventional modulation method used in sig-nal transmission. It has the advantages of easy implementation and good anti-noise performance. It is widely used in data transmission. FSK demodulation can be divided into two modes: coherent and noncoherent. In this paper, non-coherent demodulation is considered.Although the system of non-coherent demodulation is simpler than coherent demodulation, and the computation and complexity are lower. Its performanc

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Chem, Pei-Hsiang, and 陳培祥. "Applying High Frequency Modulation to Reduce Crosstalk Between Multi-Sensors and Using FPGA to Perform Digital PGC Demodulation in Time-Division Multiplexing Interferometric Sensors." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/52273952307042665244.

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碩士<br>國立高雄師範大學<br>光電與通訊工程學系<br>102<br>If the extinction ratio of the optical pulse is low in the time division multiplexing of polarization insensitive fiber optic Michelson interferometric sensors, the sensor system will suffer the crosstalk and noise to degrade the performance. In addition to adjust the extinction ratio of the optical pulse, in this paper, we use a high-frequency current signal direct modulating the laser to generate high-frequency phase signals in the sensor system. As used herein, a laser, a high frequency modulation signal, time difference of the pulse wave and the interf

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Venkitaraman, Arun. "Generalized Analytic Signal Construction and Modulation Analysis." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3316.

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This thesis deals with generalizations of the analytic signal (AS) construction proposed by Gabor. Functional extensions of the fractional Hilbert Transform (FrHT) are proposed using which families of analytic signals are obtained. The construction is further applied in the design of a secure communication scheme. A demodulation scheme is developed based on the generalized AS, motivated by perceptual experiments in binaural hearing. Demodulation is achieved using a signal and its arbitrary phase-shifted version which, in turn translated to demodulation using a pair of flat-top bandpass filter

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Venkitaraman, Arun. "Generalized Analytic Signal Construction and Modulation Analysis." Thesis, 2013. http://etd.iisc.ernet.in/2005/3316.

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Abstract:

This thesis deals with generalizations of the analytic signal (AS) construction proposed by Gabor. Functional extensions of the fractional Hilbert Transform (FrHT) are proposed using which families of analytic signals are obtained. The construction is further applied in the design of a secure communication scheme. A demodulation scheme is developed based on the generalized AS, motivated by perceptual experiments in binaural hearing. Demodulation is achieved using a signal and its arbitrary phase-shifted version which, in turn translated to demodulation using a pair of flat-top bandpass filter

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Shaddock, Daniel. "Advanced Interferometry for Gravitational Wave Detection." Phd thesis, 2000. http://hdl.handle.net/1885/48188.

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In this thesis we investigate advanced techniques for the readout and control of various interferometers. In particular, we present experimental investigations of interferometer configurations and control techniques to be used in second generation interferometric gravitational wave detectors. We also present a new technique, tilt locking, for the readout and control of optical interferometers. ¶ ...

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