Дисертації з теми "Bank of filter trees"
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Akpa, Marcellin. "Tree structure filter bank for wideband signal processing." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10407.
Повний текст джерелаBamberger, Roberto Hugo. "The directional filter bank : a multirate filter bank for the directional decomposition of images." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/15346.
Повний текст джерелаDe, Poret Frédéric. "Filter Bank Multi-Carrier Modulation." Thesis, KTH, Kommunikationsteori, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168383.
Повний текст джерелаUnder senare år har intresset för multi-carrier modulering ökat på grund av dess höga spektrumeffektivitet under antagandet om slät frekvensfäding. Den vanligaste multicarrier moduleringen i praktiken är CP-OFDM. Denna modulering tillåter användning av enkla equalizeringsmetoder och MIMO transkodare vilket behåller ortogonalitet mellan vågformerna. Däremot tillåter den inte någon flexibilitet i val av vågform och är inte heller helt spektraleffektiv. På grund av inflexibilitet i val av vågform är dess prestanda begränsad under till exempel frekvensmultiplexing (FDMA). För att förbättra prestandan hos CP-OFDM ¨ar det viktigt att ha en modulering med möjlighet att en vågform begränsad i både tid och frekvens. Grey analys visar att det enda sättet att uppnå full spektrumeffektivitet, i kombination med vågformer som är väl begränsade i både tid och frekvens, är att ge upp ortogonaliteten i komplexa fältet. Filter Bank Multi-Carrier (FBMC) med Offset-QAM (OQAM) är ett alternativ som uppnår detta. I den här avhandlingen studeras just denna modulation, hur det är möjligt att göra effektiv modulation och demodulation, men också hur dess equalizer, pre-kodare och transkoder används vid multi-tap och MIMO-kanaler. En annan modulation, baserad på FBMC med OQAM, är cyclisk offset-QAM (COQAM). COQAM försöker göra avvägning mellan spektral effektivitet och enkelhet av utjämnings- och transkodrar metoder. I den här avhandlingen studeras både FBMC-baserade modulationer och COQAM i en rad olika scenarios: osynkroniserade multianvändare, osynkroniserad upplänk, flera vägar kanaler, SIMO, MISO och MIMO-kanaler.
Kumar, Bhunesh. "Design of Harmonic Filters for Renewable Energy Applications." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1862.
Повний текст джерелаRahimi, Siavash. "Oversampled perfect reconstruction filter bank transceivers." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123137.
Повний текст джерелаLa modulation à porteuses multiples (MCM) est une technique de transmission efficace pour les communications filaires et sans fil à débit de données élevé, où la bande passante est divisée en plusieurs sous-canaux ayant chacun leur propre fréquence porteuse. Il existe de multiples réalisations possibles pour les systèmes MCM, mais le multiplexage orthogonal par répartition en fréquence (OFDM) est la solution la plus répandue dans les applications et standards présentement en vigueur. Toutefois, en raison de l'utilisation de filtres de synthèse et d'analyse rectangulaires, certaines imperfections causées par le canal de transmission, tels que les interférences à bande étroite (NBI) et le décalage de la fréquence porteuse (CFO), peuvent dégrader de manière significative les performances d'OFDM. Par ailleurs, les futurs réseaux de télécommunication nécessiteront des débits de transmission plus élevés, une plus grande efficacité de la bande passante et plus de flexibilité dans la gestion d'utilisateurs multiples non synchronisés. Les techniques de bancs de filtres à porteuses multiples (FBMC) ont récemment attiré l'attention de nombreux chercheurs.Dans ce contexte, nous proposons tout d'abord une nouvelle méthode pour la conception des bancs de filtres sur-échantillonnés à reconstruction parfaite (OPRFB) basés sur la modulation par transformation de Fourier discrète (DFT), pour les applications de transmultiplexage dans les systèmes MCM. La propriété de reconstruction parfaite (PR) est assurée par l'utilisation d'une famille paramétrique de matrices para-unitaires dans la réalisation des filtres polyphasés utilisés pour la transmission et la réception des données. L'optimisation des paramètres de conception pour la méthode choisie a pour but de minimiser l'énergie des filtres de synthèse et d'analyse dans la bande de coupure, ce qui conduit à une amélioration du confinement spectral. Les résultats d'analyse et de simulations montrent que les bancs de filtres OPRFB donnent lieu à un avantage marqué. En particulier, on constate une réduction significative du taux d'erreurs binaires (BER) lors de la transmission de données au moyen de la structure OPRFB proposée.Notre deuxième contribution porte donc sur le développement et l'analyse d'un nouvel estimateur conjoint des paramètres CFO et la réponse impulsionnelle du canal (CIR) basé sur le principe de la vraisemblance maximale (ML) et utilisant une séquence d'entraînement connue, toujours dans un contexte à usager unique. La borne de Cramer Rao (CRB) sur la variance des estimateurs non-biaisés des paramètres CFO et CIR est également dérivée. La performance du nouvel estimateur ML est soumise à l'étude par l'entremise de simulations numériques dans des conditions réalistes, soit en présence de CFO et de canaux à évanouissements en fréquence sélectifs. Les effets de différents motifs de tonalités pilotes sur la performance de l'estimation sont également. Les résultats démontrent l'excellente performance du nouvel estimateur ML conjoint proposé, qui peut déterminer avec une grande précision les paramètres CFO et CIR inconnus dans les différentes configurations expérimentales soumises à l'étude.Notre troisième et dernière contribution traite de l'extension de ce nouvel estimateur ML au cas d'usagers multiple. Plus précisément, nous considérons l'estimation conjointe du CFO et des coefficients CIR basée sur le principe ML dans la liaison montante des systèmes de transmission OPRFB multi-usagers (MU-OPRFB). Suite à son extension au cas multi-usagers, la performance de l'estimateur ML conjoint est examinée à l'aide de simulations numériques pour différents schémas d'allocation des sous-bandes entre les usagers. En outre, différentes distributions de tonalités pilotes dans le temps sont prises en compte et leurs effets sont étudiés sur des canaux radio mobiles variant dans le temps. Le potentiel d'application du nouvel estimateur ML aux systèmes multi-usagers est démontré.
Parra, Paulo Mario. "Filter-bank transforms with exact inverses." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/289984.
Повний текст джерелаTaheri, Sohail. "Performance improvement of filter bank multicarrier systems." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/846262/.
Повний текст джерелаLarsson, Mats. "Development of a Digital Universal Filter Bank." Thesis, Uppsala universitet, Signaler och System, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-307929.
Повний текст джерелаDemmer, David. "OFDM Precoding for Filter-Bank based Waveforms." Thesis, Paris, CNAM, 2019. http://www.theses.fr/2019CNAM1237/document.
Повний текст джерелаNew use cases for wireless communications recently emerged ranging from massive sensor networks to connected cars. These applications highly differ from typical signals supported by already deployed mobile technologies, which are mainly high data rate pipes. The forthcoming generation of mobile technology, 5G New Radio, introduces the concept of signal numerology so as to properly serve the requirements of the diverse applications it will support. Indeed by considering different numerologies, the time/frequency signal allocation is made more flexible which allows to shape the transmitted signal according to its needs. However, multiplexing signals with different numerologies generates interference and therefore signal distortion. Spatial filtering, such as beamforming, is envisioned for 5G above 6-GHz communications to limit inter-user interference. However, this issue still holds for sub-6 GHz systems where spatial filtering is not considered in 5G.In this work, we consider side lobe rejection techniques to ease service multiplexing in sub-6 GHz bands. Not only it provides inter-user interference mitigation but it also improves the bandwidth use efficiency in bands where frequency is a scarce resource. A novel solution, mixing filter-bank for confined spectrum and complex orthogonality for a straightforward re-use of known-how 4G/5G techniques, is proposed. The complex orthogonality is restored thanks to an OFDM precoding substituting the commonly used Offset-QAM signaling which limits the orthogonality to the real field. Moreover, the proposed solution, named Block-Filtered Orthogonal Frequency Division Multiplexing (BFOFDM), relies on a simple 5G receiver scheme which makes it backward compatible with already deployed technologies.The BF-OFDM system model is fully described and adapted to cellular standards. Besides, different prototype filter designs methods are proposed to either improve the intrinsic interference attenuation or to better confined the spectrum of the transmitted signal. Last but not least, the proposed waveform will be compared with state-of-the-art solutions for both typical and 5G oriented evaluation scenarios such as multi-service coexistence
Ha, Hoang Kha Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Linear phase filter bank design by convex programming." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/43268.
Повний текст джерелаLi, Yuanzhi. "Superconducting filter designs for Jodrell Bank astronomy observatory." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.560819.
Повний текст джерелаVidal, Salazar Andrea. "Wavelet packet filter bank selection for texture retrieval." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/150619.
Повний текст джерелаDurante los últimos años, el avance de la tecnología de captura y almacenamiento ha generado un volumen sin precedentes de imágenes digitales almacenadas en las bases de datos. Esto plantea el desafío de desarrollar sistemas autónomos que sean eficientes en la búsqueda y organización del contenido digital. Como problema emblemático surgió Content-Based Image Retrieval como área de investigación. Un sistema de indexación de imágenes busca encontrar las imágenes más similares a una en particular y está compuesto de dos etapas: extracción de características y medición de similitud. La primera etapa busca la forma de representar la imagen extrayendo las características más discriminativas, mientras que la segunda etapa es usada para ordenar las imágenes de acuerdo a su similitud. Esta tesis propone el uso de Wavelet Packet para abordar el problema de indexación de imágenes de texturas. Wavelet Packet es una herramienta del procesamiento de señales que no ha sido usada en el estado del arte para enfrentar el problema de indexación y, además, es capaz del proveer distintas representaciones para una imagen. Para seleccionar la mejor representación de Wavelet Packet, este trabajo propone una nueva metodología para el problema de indexación que aborda el problema de selección de bases para la familia de Wavelet Packets utilizando el criterio de Mínima Probabilidad de Error. Como resultado de la implementación de la metodología propuesta, se muestra que las soluciones provistas por Wavelet Packet son adaptivas y mejoran el desempeño del sistema de indexación con respecto a la solución Wavelet, bajo condiciones similares y modelos estadísticos.
Eghbali, Amir. "On Filter Bank Based MIMO Frequency Multiplexing and Demultiplexing." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7569.
Повний текст джерелаThe next generation satellite communication networks will provide multimedia services supporting high bit rate, mobility, ATM, and TCP/IP. In these cases, the satellite technology will act as the internetwork infrastructure of future global systems and assuming a global wireless system, no distinctions will exist between terrestrial and satellite communications systems, as well as between fixed and 3G mobile networks. In order for satellites to be successful, they must handle bursty traffic from users and provide services compatible with existing ISDN infrastructure, narrowcasting/multicasting services not offered by terrestrial ISDN, TCP/IP-compatible services for data applications, and point-to-point or point-to-multipoint on-demand compressed video services. This calls for onboard processing payloads capable of frequency multiplexing and demultiplexing and interference suppression.
This thesis introduces a new class of oversampled complex modulated filter banks capable of providing frequency multiplexing and demultiplexing. Under certain system constraints, the system can handle all possible shifts of different user signals and provide variable bandwidths to users. Furthermore, the aliasing signals are attenuated by the stopband attenuation of the channel filter thus ensuring the approximation of the perfect reconstruction property as close as desired. Study of the system efficient implementation and its mathematical representation shows that the proposed system has superiority over the existing approaches for Bentpipe payloads from the flexibility, complexity, and perfect reconstruction points of view. The system is analyzed in both SISO and MIMO cases. For the MIMO case, two different scenarios for frequency multiplexing and demultiplexing are discussed.
To verify the results of the mathematical analysis, simulation results for SISO, two scenarios of MIMO, and effects of the finite word length on the system performance are illustrated. Simulation results show that the system can perform frequency multiplexing and demultiplexing and the stopband attenuation of the prototype filter controls the aliasing signals since the filter coefficients resolution plays the major role on the system performance. Hence, the system can approximate perfect reconstruction property by proper choice of resolution.
Zhang, Haijian. "Filter Bank based MultiCarrier (FBMC) for Cognitive Radio Systems." Thesis, Paris, CNAM, 2010. http://www.theses.fr/2010CNAM0763/document.
Повний текст джерелаCognitive Radio (CR) is a fully reconfigurable radio that can intelligently change its communicationvariables in response to network and user demands. The ultimate goal of CR is to allowthe Secondary User (SU) to utilize the available spectrum resource on a non-interfering basis to thePrimary User (PU) by sensing the existence of spectrum holes. Therefore, the detection of PU isone of the main challenges in the development of the CR technology. Moreover, compared to conventionalwireless communication systems, CR system poses new challenges to Resource Allocation(RA) problems because of the Cross-Channel Interference (CCI) from the adjacent channels used bySU to PU. In the CR context, most past efforts have been spent on Orthogonal Frequency DivisionMultiplexing (OFDM) based CR systems. However, OFDM technique exhibits some shortcomingsin application due to its significant spectrum leakage. Filter Bank based Multi-Carrier (FBMC), asanother promising Multi-Carrier Modulation (MCM) candidate, has been recently proposed for CRapplications. In this dissertation, three important issues in developing a FBMC based CR system arediscussed.The three prime issues can be summarized: we firstly survey the spectrum sensing problemsof OFDM and FBMC signals by using Cyclostationary Signature (CS) detector. Furthermore, wepropose a Polyphase Filter Bank (PFB) based multi-band sensing architecture, and argue for its advantage;secondly, the comparison of OFDM and FBMC from the spectral efficiency point of viewis discussed; and lastly, our emphasis is placed on the strategic resource allocation algorithms fornon-cooperative multi-cell CR systems.The overall proposed algorithms have been verified by simulation. Numerical results show thatFBMC, as opposed to OFDM, could achieve higher spectrum efficiency and attractive benefit inspectrum sensing. The contributions of this dissertation have heighten the interest in applying FBMCin the future CR systems
Fleming, Ronald John. "Modern filter-controllers for bank-to-turn CLOS guidance." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317063.
Повний текст джерелаZafar, Adnan. "Filter bank based multicarrier systems for future wireless networks." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/846718/.
Повний текст джерелаVelamala, Harika. "Filter Bank Multicarrier Modulation for Spectrally Agile Waveform Design." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/293.
Повний текст джерелаChoueiter, Ghinwa F. 1980. "A wavelet and filter bank framework for phonetic classification." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/26711.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 87-91).
by Ghinwa F. Choueiter.
S.M.
Huynh, Nen. "A filter bank approach to automate vessel extraction with applications." Thesis, California State University, Long Beach, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1523090.
Повний текст джерелаMethods to extract vessel networks in medical images have been in high demand for its applications to health risk predictions. For example, vessel enhancement of retinal images has shown promises in diagnosing diabetes. Within the existing literature, multiscale vessel enhancement stands out as one of the best for its accuracy, speed, and simplicity. But like many vessel extraction techniques, the efficacy of the method is greatly hindered in the presence of noise, lighting variations, and decreased resolution. This deficiency is presents itself in retinal images and are particularly pronounced in digital photographs of human placenta.
Retinal images have a been popular data set of testing vessel extraction methods because of its simplicity in anatomical structure yet high hopes in diagnosing conditions such as diabetic retinopathy and glaucoma. Thus, the thesis will focus on the application of vessel extraction methods on retinal images. Specifically, we focus on the DRIVE and STARE database.
Also, recent placental pathology evidence has contributed to current understanding of causes of low birth weight and preterm birth, each has been linked to increased risk of later neurodevelopmental disorders. Among various factors that cause such disorders, the vessel network on the placenta has been hypothesized to offer the most clue in bridging that connection. Herein lies the most essential step of the blood vessel extraction, which has only been done manually through a laborious process.
Motivated by its ability to handle curvilinear structures, we propose the use of directional filter banks to further enhance the results obtained from the multiscale method. Validating experiments will be performed on a private database that is made available by the Placental Analytics, LLC.
It will be shown that for retinal images, the directional filter bank approach significantly improves the performance over the well-known multiscale vessel enhancement method. However, the directional filter bank approach are comparable to multiscale vessel enhancement on placentas.
Cadena, Pico Jorge Eduardo. "Perfect Reconstruction Filter Bank Structure Based On Interpolated FIR Filters." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71756.
Повний текст джерелаMaster of Science
Li, Min. "Induced norm optimal multirate filter bank design using LMI constraints /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202002%20LI.
Повний текст джерелаIncludes bibliographical references (leaves 55-58). Also available in electronic version. Access restricted to campus users.
Caus, López Màrius. "MIMO designs for filter bank multicarrier and multiantenna systems based on OQAM." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134503.
Повний текст джерелаChen, Min. "Implementation and optimization of a modulated filter bank based on allpass filters." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/9192.
Повний текст джерелаTzellos, Konstantinos. "Filter bank approach to the estimation of flexible modes in dynamic systems." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Jun%5FTzellos.pdf.
Повний текст джерелаThesis Advisor(s): Roberto Cristi. "June 2007." Includes bibliographical references (p. 55-56). Also available in print.
Nallanathan, Arumugam. "Filter bank based spreading sequences: designand performance in DS/CDMA communications systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B3124077X.
Повний текст джерелаVelazquez, Scott Richard. "A hybrid quadrature mirror filter bank approach to analog-to-digital conversion." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11538.
Повний текст джерелаIncludes bibliographical references (leaf 168).
by Scott Richard Velazquez.
M.S.
Pothuri, Aditya R. "Design of Pulse Output Direct Digital Synthesizer with an Analog Filter Bank." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1215482245.
Повний текст джерелаTerblanche, Phillip. "Electronically adjustable bandpass filter." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17966.
Повний текст джерелаENGLISH ABSTRACT: This thesis presents the study, analysis and design of electronically tunable filters, that can be tuned over a wide frequency range (20-500MHz), for use in a direct sampling receiver. The final design does not have to be a single filter, but may be comprised of a filter bank which enables switching between the filters. The band of interest is too low to use normal transmission lines and lumped elements have to be used. Different topologies that can implement Coupled Resonator filters with lumped elements are investigated. Devices that can be used for tuning are also investigated and varactor diodes are found to be the most suitable tuning devices currently available. Two filters, one at the high-end and one at the low-end of the band, were designed and built, both using varactor diodes. These filters perform well in terms of tuning range, but achieving low losses with current technologies in this band remains difficult.
AFRIKAANSE OPSOMMING: Hierdie tesis meld die studie, analise en ontwerp van elektronies verstelbare filters, wat verstelbaar is oor ’n wye band (20-500MHz), vir gebruik in ’n direk-monster-ontvanger. Die finale ontwerp hoef nie ’n enkele filter te wees nie, maar kan bestaan uit ’n filterbank wat skakeling tussen die filters toelaat. Die betrokke band is te laag vir die gebruik van normale transmissielyne en diskrete komponente moet gebruik word. Verskillende topologieë wat gekoppelde resoneerder filters implementeer met diskrete komponente is ondersoek. Verstelbare komponente word ook ondersoek en varaktor diodes blyk die mees geskikte verstelbare komponent wat huidig beskikbaar is in hierdie band. Twee filters, een aan die hoë kant en een aan die lae kant van die band, is ontwerp en gebou, beide met varaktor diodes. Hierdie filters het wye verstelbare bereik, maar dit is steeds moeilik om verliese te beperk met die huidige tegnologie.
Ju, Ziyang [Verfasser]. "A Filter Bank Based Reconfigurable Receiver Architecture for Universal Wireless Communications / Ziyang Ju." Kassel : Kassel University Press, 2010. http://d-nb.info/1016850379/34.
Повний текст джерелаNi, Jiangqun, and 倪江群. "Study of wavelet and the filter bank theory with application to image coding." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237599.
Повний текст джерелаMansour, Nour [Verfasser]. "DFT Modulated Filter Bank Transceivers for Interweave and Underlay Cognitive Radio / Nour Mansour." Kassel : Kassel University Press, 2018. http://d-nb.info/1160730180/34.
Повний текст джерелаNagy, Amr. "Performance enhancement for filter bank multicarrier methods in multi-antenna wireless communication systems." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30532.
Повний текст джерелаNallanathan, Arumugam. "Filter bank based spreading sequences : design and performance in DS/CDMA communications systems /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21779120.
Повний текст джерелаLee, Peter. "Wavelet Filter Banks in Perceptual Audio Coding." Thesis, University of Waterloo, 2003. http://hdl.handle.net/10012/927.
Повний текст джерелаDallmeyer, Matthew John. "Reducing Fir Filter Costs: A Review of Approaches as Applied to Massive Fir Filter Arrays." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1417544448.
Повний текст джерелаMartinsson, Patrik. "State of Charge Estimation in a High Temperature Sodium Nickel Chloride Battery Using Kalman Filter." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11173.
Повний текст джерелаIn today’s heavy industry there are applications demanding high power supply in certain periods of a working cycle. A typical case might be startup of heavy machinery or just keeping a certain point in a distribution network at a certain energy level. To deal with this different techniques might be used, one way is to introduce a battery as an energy reserve in the system. One battery studied at ABB for this purpose is the so called High Temperature Sodium Nickel Chloride battery and a model of this battery has been developed at ABB. When operating a battery of the mentioned type in an application it is important to keep track of the energy stored in the battery. Earlier tests has shown that this is difficult in a noisy environment.
This master thesis investigates if a Kalman filter may be used to estimate the energy stored in the battery. The investigation is performed in steps, starting with a simplified model of the battery and then expanding to a more complete model. Evaluation of the methods and algorithms used is made by simulations and based on the assumption that there is a good model available. The model is special in such a way that it has a varying number of states despite that the number of outputs remains the same.
Some comparisons with actual measurements are also made and an analysis of the parameters in the model along with an introduction to the system identification problem is discussed, assuming that the structure of the model is correct.
I dagens tunga industri finns applikationer som kräver höga effektuttag under vissa perioder av en arbetscykel. Ett typiskt fall kan vara uppstart av tunga maskiner eller att hålla en given spänningsnivå i en belastningspunkt i ett distributionsnät. För att hantera detta finns olika metoder, en möjlighet är att använda ett batteri som en energireserv. Ett högtemperaturbatteri har studerats på ABB för detta ändamål och en model av detta batteri har tagits fram. När ett sådant batteri används är det viktigt att kontinuerligt veta hur mycket energi som finns till förfogande i batteriet. Tidigare tester har visat att detta är svårt i en brusig miljö.
I detta examensarbete kommer det undersökas om ett Kalman filter kan användas för att skatta energin i detta batteri. Undersökningen sker i steg och startar med en förenklad modell som sedan utvecklas till en mer komplett modell. Utvärdering av de metoder och algoritmer som används sker via simuleringar och baseras på antagandet att modellen är komplett och riktig. Denna modell är speciell på det sätt att den har ett variabelt antal tillstånd trots att antalet utsignaler är konstant.
Viss jämförelse med de mätningar som finns tillgängliga görs och en inledande analys av de ingående modellparametrarna presenteras. Även en introduktion till det omfattande systemidentifieringsproblemet diskuteras, med antagandet att modellens struktur är korrekt.
Nayebi, Kambiz. "A time domain framework for the analysis and design of FIR multirate filter bank systems." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/13867.
Повний текст джерелаZakaria, Rostom. "Transmitter and receiver design for inherent interference cancellation in MIMO filter-bank based multicarrier systems." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2012. http://tel.archives-ouvertes.fr/tel-00923184.
Повний текст джерелаWeaver, Michael B. "Performance comparison between three different bit allocation algorithms inside a critically decimated cascading filter bank." Diss., Online access via UMI:, 2009.
Знайти повний текст джерелаIncludes bibliographical references.
Wieben, Oliver. "The classification of PVCs using filter bank features, induction of decision trees and a fuzzy-rule-based system." 1996. http://catalog.hathitrust.org/api/volumes/oclc/37162236.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 24-26).
Chen, Shih-Heng, and 陳仕衡. "FDM Using Modulation Filter Bank." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/65642472096065833494.
Повний текст джерела國立交通大學
電信研究所
85
Digital implementation of frequency division multiplexing is investigated withthe use of perfect reconstruction filter bank. The PR filter bank is shown tobe equivalent to a cross talk free trans-multiplexer with synthesis section as the multiplexing input and the analysis section as the de-multiplexing output. With such filter bank implementation, both the QAM multiplexing and the VSB multiplexing are simulated. The advantage of such digital implementation is that the bandwidth utilization can be maximized and the band assignment can beeasily achieved as the selection of the modulation interpolation filter.
"Adaptive Filter Bank Time-Frequency Representations." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15948.
Повний текст джерелаDissertation/Thesis
M.S. Electrical Engineering 2012
Chang, Che-Shuo, and 張哲碩. "Filter-based Empirical Mode Decomposition and Its Application to Filter Bank Design." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/63714394844134373130.
Повний текст джерела國立臺灣大學
電信工程學研究所
100
The empirical mode decomposition (EMD) has been widely applied to many research fields for decomposing the signal. The algorithm is based on the spline interpolation of local extreme points. This procedure makes it difficult to analyze the performance and the corresponding mathematical properties. Thus till now most of knowledges about EMD are based on practical observations. In addition, the EMD itself has little flexibility to adapt to different requirement. In this work, the proposed filter-based empirical mode decomposition (FB-EMD) provides a parametrized algorithm adjustable for different settings. In this way it is possible to change the decreasing rate of the cutoff frequency of the intrinsic mode function (IMF). Moreover, the equivalent filter bank and the decomposition results are predictable and controllable. This enables us to apply the FB-EMD to the filter bank design. Another feature of the FB-EMD is that the algorithm is resistant to the noise and intermittencies. While being free from the boundary process and the mode mixing problem, the proposed method is also efficient. The numerical results show that in general the FB-EMD have better performance in real signals and autoregressive moving-average signals. The spectral overlap is also reduced. These discussions and the numerical results is helpful for developing a theoretic framework for the EMD based algorithm.
Chiang, Hwang-Cheng, and 姜皇成. "Implementation and Application of Sinusoidal Modulated Filter Bank." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/56086491167320310213.
Повний текст джерела大同工學院
電機工程學系
84
Multirate signal processing has been a growing field for more than one decade. The analysis-synthesis systems have found many applicationssuch as speech, image coding, transmultiplexing, adaptive filteringand spectral analysis. One of the issues recognized as being importantto the successful application of these systems is the computational complexity. A significant solution to reducing the computational complexity is based on the sinusoidal modulated filter banks. Traditionalblock transforms, including the DFT, DHT, DCT, and DST, and the extendedlapped transform are all examples of the sinusoidal modulated filterbanks. In this dissertation, we pay our attention to implenentationand application of the sinusoidal modulated filter banks. We propose two implementations for the modulated filter banks: 1. We present a unified second order structure for computation of filter banks with arbitrary length of basis functions. For the regularity and parallelism of the structure, the new scheme really provides a low cost hardware implementation and is especially suitable for VLSI technologies. 2. For the M-band cosine modulated filter banks, the analysis and synthesis sections are efficiently implemented with two M-point of DFTs and some extra operations. In addition, two main applications of the DFT and DCT filterbanks are discussed in detail: 1. The DFT filter bank is used for fast FIR filtering in the transform domain. From a measure of computational complexity, the proposed implementation has been proved to have better performance than the overlap-add and overlap- save algorithms. 2. The analysis filters of the DCT filter bank are converted into a unified second filter form which requires only two multipliers and five adders to implement. The structure is used as a prefilter for efficient digital filter design. The proposed prefilter structure has been proved to be an efficient one for the design of lowpass, bandpass and highpass digital filters simutaneously.
Hsu, Shih-huai, and 許時懷. "Improved Filter-bank of Speech Feature Coefficient Extraction." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/46443189430807779003.
Повний текст джерела國立中央大學
電機工程學系
103
The theme of this thesis is to improve the part of feature extraction in the speech keyword recognition. In the framework of the entire keyword recognition system, feature extraction is to highlight the individual features of different voices, and can reduce the amount of data by means of the extract process. Many researchers have presented different ways to extract the speech features in the literature, or on which making improvements at extracting feature coefficient method. This thesis discusses several improved filter bank in mel-frequency cepstral coefficients (MFCC). The best filter bank is used to replace the original mel-triangular filter set. The experimental results showed that the application of this improved filter bank can effectively improve the recognition rate of the keyword extraction system.
Yeh, Ming-Chen, and 葉銘琛. "Subband Image Coding using Hierachical Hexagonal Filter Bank." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/81733718594267634781.
Повний текст джерелаElGarewi, Ahmed. "Analysis of algorithms for filter bank design optimization." Thesis, 2019. http://hdl.handle.net/1828/11131.
Повний текст джерелаGraduate
Lee, Yu-An, and 李祐安. "Implementation of Filter Bank Multicarrier System using SDR." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6k6s2q.
Повний текст джерела國立中山大學
通訊工程研究所
107
Current wireless communication systems mainly adopt the multicarrier transmission in the physical layers due to the higher spectrum utilization in frequency selective fading channel. The prominent design is the orthogonal frequency division multiplexing (OFDM) system, where the signals are transmitted by the individually orthogonal carriers with rectangular shaping waveforms. However, the rectangular waveforms essentially spread its frequency response, interfering the adjacent sub-band systems. In this regard, the filter bank multi-carrier/offset quadrature amplitude modulation (FBMC/OQAM) was developed to reduce the sidelobes of a subcarrier by using a smoother shaping waveforms. Accordingly, it becomes a promising technology for the next generation wireless systems. In this thesis, we develop the transceiver design with FBMC/OQAM modulation system in a Xilinx software-defined radio (SDR) platform, where the both synchronization, channel estimation and detection are implemented. Finally, we successively transmit a photo in our developed benchmark.
Li, Chia-Lun, and 李嘉倫. "Research on Four-Channel Switchable Bandpass Filter Bank." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/48etpg.
Повний текст джерела國立中央大學
電機工程學系
107
This thesis uses SP4T to switch the four different passband paths. The center frequencies of four passband are 1.25 GHz, 1.75 GHz, 2.25 GHz, and 2.75 GHz. Both of them are 500 MHz bandwidth, and the other hand the lower center frequency, the higher passband bandwidth be. By comparing different circuits, chooses the better circuit design to match the passbands of different center frequencies and bandwidths. With the metal housing to shield the noise from the outside can improve the response of the stopband. And the circuit used two SP4T to complete the design of the four-channel switchable bandpass filter. By comparing the different circuit design, use the design with the best selectivity and smaller area. The three-mode resonator is used to design the band 1. And the others use the hairpin bandpass filter, because the thicker PCB has stronger coupling in the same gap to improve the success rate of the etching process. And even can use the Chebyshev prototype parameters to design the bands systematically. However, the passband of the 2.25 GHz center frequency used stepped impedance resonator (Stepped Impedance Resonator) to make the first harmonic frequency higher. And there are two different welding process for the QFN and QSOP package to improve the success rate of welding and even low cost. The circuit size finally is 13 cm × 8.5 cm. The lowest insertion loss of each passband is 5.5 dB, 8.58 dB, 7.84 dB and 7.91 dB. The S21 of the stop band is all below -20 dB, and each passband is switchable.
Guo, Shu-Na, and 郭淑娜. "Equalizer Design and Implementation for Filter Bank Multicarrier System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/97220431748673021277.
Повний текст джерела國立中央大學
電機工程學系
105
Orthogonal frequency division multiplexing (OFDM) utilizes the quadrature characteristics of the subcarriers and the cyclic prefix to eliminate inter-symbol and inter-carrier interference. Filter bank Multicarrier (FBMC) uses offset quadrature amplitude modulation (OQAM) to maintain the orthogonality between adjacent subcarriers and a filter with good stopband attenuation to avoid the circular convolution aliasing. So the FBMC didn’t need the cyclic prefixes can also eliminate symbols between the interference, leading to higher bandwidth efficiency. In this paper, we analyze how to eliminate the inter-symbol interference and inter-carrier interference in the receiver of the FBMC. Channel estimation is performed using the preamble under the WIMAX specification, and the channel effect is compensated using a single carrier frequency domain equalizer. Equalizer has three options: 1. Finite impulse response equalizer. 2. Minimum mean square frequency domain equalizer. 3. Decision feedback equalizer. We would compare those equalizers based on simulation results. The decision feedback equalizer employed since it is able to achieve the 10-2 bit error rate threshold at SNR that is lower than other equalizers. Decision feedback equalizer is descripted with Verilog HDL, and used FPGA to verify its circuit design.