Дисертації з теми "Filters’ design"
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Anderson, Martin S. "Design of two-dimensional PCAS digital filters and filter banks." Thesis, University of Warwick, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307968.
Повний текст джерелаChen, Tsuhan Vaidyanathan P. P. Vaidyanathan P. P. "Multidimensional multirate filters and filter banks : theory, design, and implementation /." Diss., Pasadena, Calif. : California Institute of Technology, 1993. http://resolver.caltech.edu/CaltechETD:etd-08232007-095226.
Повний текст джерелаZakaria, Zahriladha. "Design of lossy filters." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531592.
Повний текст джерелаLaw, Ying Man. "Iterative algorithms for the constrained design of filters and filter banks /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20LAW.
Повний текст джерелаIncludes bibliographical references (leaves 108-111). Also available in electronic version. Access restricted to campus users.
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 джерелаElsayed, Ahmed Elsayed Ahmed. "Design of H#infinity# filters." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303235.
Повний текст джерелаMelgarejo, Lermas Juan Carlos. "Advanced Techniques for the Design and Optimization of Multi-Band and Reconfigurable Microwave Waveguide Filters." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/172728.
Повний текст джерела[CA] El creixent nombre de dispositius intercanviant dades ha empés a les empreses del sector espacial a utilitzar bandes de freqüència cada vegada més altes, com Ku, K i Ka, ja que permeten fer servir canals de freqüència més amples. A mesura que la longitud d'ona disminueix, la mida dels filtres es redueix i, per tant, són més sensibles a les desviacions de fabricació. Per compensar aquests errors, és necessari fer servir elements de sintonia en l'etapa de disseny. En aquest context presentem una estratègia de disseny que permet incloure tots els factors no ideals, com a elements de sintonia o cantonades arrodonides, en les simulacions finals de filtres i multiplexors. Una vegada s'han fabricat els filtres és necessari ajustar manualment els elements de sintonia fins a recuperar la resposta objectiu. Però, per realitzar aquesta tasca amb èxit és necessari tenir molta experiència prèvia i, així i tot, comporta un temps considerable. Per tant, també proposem un procediment de sintonització eficient i sistemàtic que permet a qualsevol persona, independentment de la seua experiència prèvia en sintonització, realitzar aquesta tasca amb èxit. A més de l'augment de les taxes de transmissió, altres desafiaments de el sector espacial són reduir la mida i pes dels seus components, així com dotar-los de capacitat de reconfiguració. Emprar dispositius multifunció com filtres multibanda o dispositius reconfigurables és una possible solució. En aquest context, proposem una nova família de filtres multibanda en guia d'ones que pot adaptar-se a les futures necessitats del sector espacial. Amb el mateix objectiu, també proposem una família de dispositius reconfigurables de diversos estats discrets que poden modificar el seu comportament de forma remota.
[EN] The need for ever increasing data rate of modern communication systems has motivated companies in the space sector to exploit higher frequency bands, such as Ku, K and Ka, in order to offer wider bandwidths to their customers. However, as the frequency increases, the wavelength decreases, and all waveguide hardware becomes smaller and more sensitive to deviations from the ideal dimensions that normally occur when manufacturing the devices. In order to compensate for these deviations (or errors), tuning elements must then be added to the hardware and included in the design process. In this context, therefore, we focus on the investigation of novel design strategies for filters and multiplexers with the objective of including all necessary non-ideal factors in the design process. It is important to note in this context that, once the filters are manufactured, the tuning elements are usually adjusted manually until the desired target performance has been achieved. However, successfully performing this task requires a considerable amount of time and very significant previous experience in tuning microwave filters. Consequently, an additional goal of our research work is to propose efficient and systematic tuning procedures so that anyone, regardless of their previous tuning experience, can successfully perform this difficult task. In addition to the increasing data rates, another current challenge of advanced communication systems is the ability to be reconfigured remotely to adjust to changes in costumer demands. The use of multi-function or reconfigurable devices is then an attractive possible solution. In this context, therefore, we also investigate new families of multi-band waveguide filters that can be used to accommodate several pass bands in the same filtering device. Furthermore, we also propose a new family of reconfigurable devices with several discrete states that can be easily controlled remotely.
Melgarejo Lermas, JC. (2021). Advanced Techniques for the Design and Optimization of Multi-Band and Reconfigurable Microwave Waveguide Filters [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/172728
TESIS
Silveira, Taboadela Patricia María. "Systematic Design Methodology for Acoustic Wave Filters Integrated in Multiplexers and Codesigned Modules." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/673855.
Повний текст джерелаLa implementación de la tecnología 5G a nivel mundial y el extendido uso de conexiones inalámbricas han impulsado el incremento acelerado del número de bandas de radio frecuencia (RF) que deben ser soportadas por los teléfonos inteligentes y los dispositivos móviles. Al mismo tiempo aumenta la complejidad de los esquemas de modulación, el número de antenas y la cantidad de portadoras con el objetivo de aumentar la velocidad de conexión. Estas demandas requieren avances en la tecnología de filtros de RF que garanticen la selección correcta de cada portadora y la adquisicion íntegra de la información deseada. Sumamos además la necesidad de tener dispositivos cada vez más pequeños en un espacio cada vez más reducido y capaces de manejar mayores potencias en un escenario de alta integración. En este contexto tan desafiante, los filtros basados en resonadores de tecnología microacústica han demostrado ser la solución para cubrir las necesidades del mercado. El diseño de filtros en esta tecnología ha estado dominado por técnicas de optimización que requieren un gran tiempo de procesado y un esfuerzo computacional no eficientes desde el punto de vista industrial. Sin embargo, herramientas de simulación basadas en métodos de síntesis avanzados que consideran los requerimientos propios de la tecnología han sido desarrollados en los últimos años en nuestro grupo de investigación con el objetivo de proporcionar una solución precisa y rápida que sirva de semilla para una posterior optimización. Esta tesis persigue como objetivo dar respuesta a la tendencia actual de integración de múltiples filtros en módulos de RF que incluyen amplificadores de potencia (PA) para disminuir la ocupación dentro de los smartphones. Durante el proceso de diseño de multiplexores he aplicado conceptos con fundamentos teóricos sólidos como las Redes de Mínima Susceptancia y he introducido el control de la fase en el proceso de síntesis como elemento clave en la clasificación de dichas redes de filtrado. Dos posibles escenarios fueron analizados según el plan de frecuencia: fijo y flexible. Este último escenario es especialmente complejo y constituye una demanda industrial reciente debido a la aparición de la tecnología de Carrier Aggregation. La metodología presentada garantiza la viabilidad tecnológica y el cumplimiento de las especificaciones para cada banda de frecuencia. Como parte de la integración en módulos, esta tesis también incluye la síntesis de filtros acústicos con impedancia compleja a la entrada y/o salida. Esta propuesta permite el codiseño de filtros con elementos activos o pasivos para eliminar redes intermedias de adaptacion de impedancia. Se ilustra el proceso de codiseño de amplificadores de potencia y filtros en tecnología microacústica desde un punto de vista integrador para garantizar una alta eficiencia en la conversión de energía y potencias de salida estables en toda la banda de frecuencia. Simultáneamente, una respuesta de filtrado tipo Chebyshev es obtenida en el dispositivo final. El control de la fase con diferentes objetivos es también abordado en este documento. Todos los análisis teóricos han sido acompañados de ejemplos simulados y prototipos fabricados que demuestran la ideoneidad de los planteamientos. Los resultados alcanzados han sido resumidos en cada capítulo.
The worldwide implementation of 5G technology and the extended use of wireless networks have boosted the fast-paced increase in the radio frequency bands number supported by smartphones and other mobile devices. Simultaneously, to increment the connection speed, the modulation scheme complexity, antenna number, and carrier aggregated are increasing. These specifications require advances in the RF filter technology to ensure the proper selection of each carrier and the full information acquisition. Additionally, smaller devices are needed for a shrinking space and also be able to handle higher powers in a highly integrated scenario. In this challenging environment, resonators based on acoustic wave (AW) technology have demonstrated to be the solution for the market requirements. The AW filter design has been driven by optimization techniques that require a time-consuming process and computational efforts, being inefficient from the industry point of view. Nevertheless, simulation tools based on advanced synthesis techniques considering the technological accommodation have been developed in our research group in the last years. These tools provide precise and fast solutions as the first tier for a later optimization procedure. The principal purpose of this thesis is to meet the current demands of integration of multiple filters in one RF module, namely multiplexers, and also including power amplifiers (PA) to reduce the device size inside the smartphones. For the multiplexers design, the Minimum Susceptance Networks (MSN) concept has been exploited, introducing the reflection coefficient phase control as a key element for this kind of network classification. Two probable scenarios were analyzed regarding the frequency plan: fixed and flexible. The latter is a complex case boosted by the advent of the Carrier Aggregation technology and the market requirements. The proposed methodology guarantees technological feasibility and mask specifications fulfillment for each channel. As part of the AW filters module integration, this thesis addresses the synthesis considering complex source/load impedances. The proposal allows the co-design of filters with active or passive networks removing the common inter-stage matching network. It is illustrated the co-design process for power amplifiers and filters analyzing each part's features to ensure high efficiency and output power in the passband. Simultaneously, a Chebyshev filter response is obtained in the resulting device. Moreover, the phase control with different purposes is also discussed in this document. The theoretical analysis has been supported by simulated examples and manufacturing prototypes that show the approach's pertinence. The achieving results have been summarized at each chapter's end.
Universitat Autònoma de Barcelona. Programa de Doctorat en Enginyeria Electrònica i de Telecomunicació
El-Feghi, Idris S. "Design of three-dimensional digital filters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0013/MQ52542.pdf.
Повний текст джерелаWicks, Tony. "Design and implementation of PCAS filters." Thesis, University of Warwick, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308510.
Повний текст джерелаMoazzam, Mohammad Reza. "Novel design techniques for microwave filters." Thesis, King's College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295724.
Повний текст джерелаGuo, Mofei. "Multi-passband filters and tunable filters design based on coupled resonator circuits." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6859/.
Повний текст джерелаSEN, SUMIT. "DESIGN OF NONLINEAR FILTERS FOR SIGNAL ESTIMATION AND COMPARISON WITH KALMAN FILTERS." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1050093518.
Повний текст джерелаRosler, Lucas Owen. "Design and Analysis of an FPGA Based Low Tap Band-stop FIR Filter." Youngstown State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1619798270047225.
Повний текст джерелаLanger, Max. "Design of Fast Multidimensional Filters by Genetic Algorithms." Thesis, Linköping University, Department of Biomedical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2704.
Повний текст джерелаThe need for fast multidimensional signal processing arises in many areas. One of the more demanding applications is real time visualization of medical data acquired with e.g. magnetic resonance imaging where large amounts of data can be generated. This data has to be reduced to relevant clinical information, either by image reconstruction and enhancement or automatic feature extraction. Design of fast-acting multidimensional filters has been subject to research during the last three decades. Usually methods for fast filtering are based on applying a sequence of filters of lower dimensionality acquired by e.g. weighted low-rank approximation. Filter networks is a method to design fast multidimensional filters by decomposing multiple filters into simpler filter components in which coefficients are allowed to be sparsely scattered. Up until now, coefficient placement has been done by hand, a procedure which is time-consuming and difficult. The aim of this thesis is to investigate whether genetic algorithms can be used to place coefficients in filter networks. A method is developed and tested on 2-D filters and the resulting filters have lower distortion values while still maintaining the same or lower number of coefficients than filters designed with previously known methods.
Corrales, López Edén. "Analysis and Design of Bulk Acoustic Wave Filters Based on Acoustically Coupled Resonators." Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/42011.
Повний текст джерелаEl rápido crecimiento de los sistemas de telecomunicaciones inalámbricas ha llevado a una creciente demanda de dispositivos móviles con requisitos cada vez más estrictos para los filtros de microondas incluyendo un mejor rendimiento, miniaturización y la reducción de costes. Una nueva tecnología de filtros de RF se ha consolidado en la última década: la tecnología BAW. Los filtros BAW son perfectamente adecuados como filtros miniaturizados y de alto rendimiento para aplicaciones de alta frecuencia. En comparación con la tecnología SAW, los filtros BAW proporcionan menores pérdidas de inserción, una mejor selectividad, compatibilidad CMOS, mejor manejo de potencia y una mayor frecuencia de trabajo. Un CRF BAW es uno de los más recientes filtros BAW que permite ofrecer una amplia gama de nuevas e interesantes propiedades en comparación con sus predecesores. Basado en el concepto de resonadores acoplados acústicamente, se pueden ofrecer respuestas Chebyshev clásicas y avanzadas, mejor ancho de banda, más miniaturización y conversión de modo. La complejidad de un CRF es considerable en términos de diseño y fabricación, debido a la cantidad de láminas que lo conforman. El diseño de filtros BAW se basa en dimensionar las capas del dispositivo. El diseño es complejo y los procedimientos de optimización pueden no ser eficientes debido a la cantidad de variables que intervienen en el proceso. En este trabajo se presenta una metodología de análisis y síntesis. Las técnicas pueden hacer frente a las estructuras de varias capas de una manera directa. Se presenta un conjunto de modelos circuitales completamente eléctricos que simplifican y recogen el comportamiento de los CRF, dispositivos que funcionan tanto en los dominios eléctrico y mecánico. Se han establecido un conjunto de herramientas para analizar el resonador mediante teoría de redes y es la base para el análisis de estructuras compuestas de varios resonadores y múltiples capas de láminas delgadas. Se desarrolla un modelo para el CRF utilizando transformaciones de red y aproximaciones respecto a las frecuencias de funcionamiento de los dispositivos BAW. Se presenta un análisis profundo del BAW CRF con los modelos propuestos como una herramienta que permite guiar el procedimiento analítico. El análisis de los filtros facilita una mejor comprensión de su funcionamiento y una manera de establecer los límites de las respuestas que pueden ofrecer. Se presentan metodologías de diseño de filtros con el fin de obtener las geometrías de la estructura y la topología de los filtros BAW para cumplir con las respuestas prescritas. El diseño del filtro se da a partir de una comprensión clara de sus mecanismos de filtrado de modo que facilita la explotación de sus características inherentes. Las respuestas avanzadas con ceros de transmisión o los filtros de banda de rechazo procedentes de los nuevos dispositivos presentados se sintetizan por medio de las metodologías propuestas.
The speedy growth of wireless telecommunication systems has led to an increasing demand for hand-held devices with more and more stringent requisites for microwave filters including better performance, miniaturization and reduced costs. A new RF filter technology has emerged during the last decade: BAW technology. BAW filters are perfectly suitable as miniaturized high performance filters for high frequency and power applications. Compared to SAW filter technology, BAW filter solutions can provide lower insertion loss, better selectivity, CMOS compatibility, higher power handling and higher operation frequency.A BAW CRF is one of the latest BAW filter topologies to offer a range of new and interesting properties compared to its predecessors. Based on the concept of acoustically coupled resonators, it can provide classical and advanced Chebyshev responses, better bandwidths, more miniaturization and mode conversion. The complexity of a CRF is considerable in terms of design and fabrication due to the quantity of films that it comprises.The design of BAW filters is based on sizing the layers of the physical device. It becomes complicated with this amount of layers, and optimization procedures may not be efficient due to the number of variables involved in the process. A methodology to analyze and synthesize BAW CRFs is presented in this work. The techniques can deal with multilayered structures in a straightforward way.A set of fully electric circuital models that simplify and gather the behavior of CRFs, devices that work both in the electrical and the mechanical domains, are presented. A set of tools to analyze the resonator by means of network theory is established and is the basis for analyzing structures composed of several resonators and multiple thin-film layers. A model for the most basic CRF is developed using network transformations and approximations regarding the frequencies of operation of the BAW devices.A profound analysis of BAW CRFs is presented using the proposed models as an enabling tool to guide the analytical procedure. The analysis of those filters facilitates a better understanding of their performance and a way to establish the limits on the responses that they can provide. Systematic filter design methodologies are presented in order to obtain the structure geometries and topologies of BAW filters to fulfill prescribed responses in such a way that fully time-consuming and sometimes not very controlled optimization-oriented procedures are avoided. The design of the filter from a clear understanding of its performances facilitates the exploitation of its inherent characteristics. Advanced responses with transmission zeros or stopband filters coming from new devices are synthesized by means of the proposed methodologies.
Yassine, H. M. "Design and realization of switched capacitor filters." Thesis, London South Bank University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618624.
Повний текст джерелаBrown, Jeremiah. "DESIGN AND OPTIMIZATION OF NANOSTRUCTURED OPTICAL FILTERS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2825.
Повний текст джерелаPh.D.
Optics and Photonics
Optics and Photonics
Optics PhD
Thomson, Neil Andrew. "Advanced design of miniature wideband microwave filters." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/111.
Повний текст джерелаGreen, Alan C. "Advances in the design of aperture filters." Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273400.
Повний текст джерелаYearsley, Jonathan D. "Product family design using Smart Pareto filters /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd2687.pdf.
Повний текст джерелаYearsley, Jonathan D. "Product Family Design Using Smart Pareto Filters." BYU ScholarsArchive, 2008. https://scholarsarchive.byu.edu/etd/1664.
Повний текст джерелаYassine, Hatem Mahmoud. "Design and realization of switched capacitor filters." Thesis, London South Bank University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480856.
Повний текст джерелаHerbertz, Kai. "Design and characterisation of electromagnetic bandgap filters." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5938.
Повний текст джерелаMeng, Meng. "Design and synthesis of lossy microwave filters." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7379/.
Повний текст джерелаSundaralingam, Sathiaseelan. "Evolving optimal IIR and adaptive filters." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300977.
Повний текст джерелаTseng, Chien H. "Iterative algorithms for envelope-constrained filter design." Curtin University of Technology, Australian Telecommunications Research Institute, 1999. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=10453.
Повний текст джерелаan ordinary differential equation given in terms of the gradient flow. Two iterative algorithms utilizing the simple structure of the gradient flow are developed via discretizing the differential equations. Their convergence properties are derived for a deterministic environment. From the primal-dual relationship, the corresponding sequence of approximate solutions to the original discrete-time EC filtering problem is obtained.The continuous-time EC filtering problem (semi-infinite convex programming problem) is handled using the continuous Lagrangian duality theory and Caratheodory's dimensionality theory. Several important properties are derived and discussed in relation to practical engineering requirements. These include the observation that the continuous-time optimal filter via orthonormal filters has the structure of a matched filter in cascade with another filter. Furthermore, the semi-infinite convex programming problem is converted into an equivalent finite dual optimization problem, which can be solved by the optimization methods developed. Another issue, which relates to the continuous-time optimal filter design problem, is the design of robust optimal EC filters. The robustness issue arises because the solution of the EC filtering problem lies on the boundary of the feasible region. Thus, any disturbance in the prescribed input signal or errors in the implementation of the optimal filter are likely to result in the output constraints being violated. A detailed formulation and a corresponding design method for improving the robustness of optimal EC filters are given.Finally, an adaptive algorithm suitable for a stochastic environment is presented. The convergence properties of the algorithm in a stochastic environment are established.
Köroğlu, Mustafa Hadi. "High frequency integrated filters for wireless applications." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/14458.
Повний текст джерелаYunus, Haroon Iqbal. "Single phase active power filters." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13282.
Повний текст джерелаAl-Yasir, Yasir, Yuxiang X. Tu, M. S. Bakr, Parchin Naser Ojaroudi, Abdalfettah S. Asharaa, W. Mshwat, Raed A. Abd-Alhameed, and James M. Noras. "Design of multi-standard single/tri/quint-wideband asymmetric stepped-impedance resonator filters with adjustable TZs." IET Microwaves, Antennas & Propagation, 2019. http://hdl.handle.net/10454/17154.
Повний текст джерелаThis study presents an original asymmetric stepped-impedance resonator filter combined with meander coupled-line structures and enabling the realisation of finite transmission zeros (TZs) and the implementation of multi-band bandpass filters. The meander coupled sections (MCSs) tune the TZs and resonant frequencies: with higher-order spurious frequencies cancelled by the TZs, a single wideband with wide stopband from 1.18 to 1.84 GHz is possible. Furthermore, by positioning the finite TZs between the high-order spurious frequencies and adjusting the coupling strength between resonators, a quint-wideband filter can be realised, with centre frequencies of 1.19, 4.29, 5.43, 6.97, 9.9 GHz and fractional bandwidths of 31.9, 15.4, 15.8, 4.3, 39.2%, respectively. More importantly, two filters with single/quad-wideband performance can be realised by tuning the parameters of the MCS, and therefore they can be designed separately by using only one original structure. The triple-wideband filter is realised with the help of the asymmetric parallel uncoupled microstrip section. These filter structures enjoy the advantage of single/multi-band versatility, structure reusability and simplicity. The good in-band and out-of-band performance, low loss and simple structure of the proposed single/tri/quint-wideband filters make them very promising for applications in future multi-standard wireless communication.
European Union's Horizon 2020 research and innovation programme under Grant agreement H2020-MSCA-ITN-2016 SECRET-722424.
Chen, Charng-Kann, and 陳常侃. "Optimal Design of Digital Filters and Digital Filter Banks." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/60246289762306954645.
Повний текст джерела國立臺灣大學
電機工程研究所
82
The work of this dissertation is to devise novel and efficient techniques for optimally designing one-dimensional (1-D) digital filters, two-dimensional (2-D) digital filters, 1-D multirate filter banks, and 2-D multirate filter banks in the appropriate optimal sense. As for the 1-D digital filters, the proposed techniques include the design algorithms for designing quasi-equiripple FIR and IIR digital filters, discrete coefficient FIR digital filters with arbitrary amplitude and phase response, digital all-pass filters, high order digital differentiators using $L_{1}$ error criteria, sharp FIR digital filters with prescribed group delay phase response, and cascade form FIR digital filters with powers-of-two coefficients in the complex domain, and Chebyshev design of IIR digital filters with arbitrary magnitude and phase responses. On the other hand, this dissertation also presents two approaches for equiripple design of 2-D linear-phase FIR digital filters. One approach is based on a novel minimax design method and the other approach is the McClellan transform based design techniques. With regard to the 1-D filter bank systems, a deep study of designing quadrature mirror filters (QMF) with linear phase in the frequency domain using different optimal criteria is given. The powers-of-two coefficient design of QMF bank is considered, too. Other than the uniform-division QMF banks, the design of two-channel nonuniform-division maximally decimated filter banks is thoroughly studied. Considering the design of 2-D multirate filter bank systems, a novel minimax design of 2-D nonseparable QMF banks with non-diagonal decimation/ expansion matrix is presented. It is shown that the quincunx QMF bank and the parallelogram QMF bank can be easily designed using the method.
Lin, Yu-Wei, and 林煜偉. "Design of Variable FIR Filters and IIR All-Pass Filters and Filter Banks with Discrete Coefficients." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/20542395782371250093.
Повний текст джерела國立臺灣大學
電信工程學研究所
92
In this thesis, we consider three kinds of digital filters with filter coefficients taking on -1, 0, +1 only. One is variable fractional delay FIR filter and the others are IIR allpass filter and filter banks. We design these two kinds of digital filters with continuous coefficients using WLS algorithm and Karmarkar algorithm, in minmax criteria methods are proposed.. When we implement a filter of conventional structure, we always need multibit multipliers. But the circuit complexity and high cost of multibit multipliers always confuse us. Thus, we adopt a new filter structure [25] whose main part consists of a transversal filter with tap coefficients restricted to -1, 0, +1 only and cascaded with an appropriate recursive network with some specific resetting function. Therefore, it is not necessary for transversal filter to use multipliers; the adopted configuration is suitable for hardware implementation. We apply the new structure to the design of the digital filter we discuss above. In this thesis, we design variable delay FIR filter, IIR allpass filter, and IIR filter banks. The design examples are demonstrated to illustrate the effectiveness of the new structure.
Shih-Ken, Yang, and 楊世任. "Minimax Design of Digital Filters and Perfect-Reconstructioo Filter Banks." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/40541120838292130400.
Повний текст джерела國立臺灣科技大學
電子工程技術研究所
86
This dissertation presents several novel and efficient techniques for optimally designing one-dimensional (1-D) perfect-reconstruction (PR) filter banks, two-dimensional (2-D) FIR digital filters, and 2-D perfect- reconstruction and near-perfect-reconstruction parallelogram filter banks in the minimax senses. The proposed approaches are developed based on the affine and dual affine scaling variants of Karmarkar''s algorithm. As for the 1-D perfect-reconstruction digital filter banks, two novel techniques are proposed for designing PR filter banks with FIR analysis and synthesis filters having linear phase responses as well as low delay characteristics. The designed analysis and synthesis filters for both cases are optimal in the minimax sense subject to the perfect-reconstruction constraints. With regard to the design of 2-D digital filters, we propose design techniques for continuous and powers-of-two coefficients 2-D digital filters based on the minimax sense. The optimal continuous coefficient filters are first designed by an affine scaling variant of Karmarkar''s algorithm. Then a suboptimal powers-of-two coefficient filter is obtained by an efficient method from the optimal continuous filter coefficients. The design of 2-D parallelogram filter banks is also studied thoroughly. The linear-phase FIR analysis and synthesis optimal in minimax sense are considered. Two novel techniques for designing perfect-reconstruction and near-perfect-reconstruction 2-D parallelogram filter banks are presented. From the simulation examples demonstrated in each chapter of this dissertation, the effectiveness of the proposed design techniques for each considered design problem can be confirmed.
Sun, Jhong-Min, and 孫中民. "Design of Dual-Band Bandpass Filter and Wide Stopband Filters." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/47180979286321478096.
Повний текст джерела國立中正大學
電機工程研究所
99
There are two parts in this thesis. The first part is design of a planar microwave dual-band bandpass filter. The structure of this dual-band bandpass filter is composed of an open-end coupled line and two parallel coupled lines with coupling feeding. Because the unequal even-mode and odd-mode phase velocity of the open-end coupled line, the interdigital capacitors at two ends of open-end coupled line are utilized to compensate the odd-mode phase velocity. Moreover, the added capacitive coupling between the input and output ports can move two transmission zeros at the passband skirts more closely. Then, two of single passband filters with different central frequencies are cascoded to achieve a dual-passband bandpass filter, and the J-inverter has been used to analyze this filter. In the second part, the planar microstrip bandpass filters with wide stopband are presented. The open-end coupled line, transmission line and short stub are the main structure of the wide stopband bandpass filter. By properly choosing electrical lengths of open-end coupled line, transmission line and short stub, the outband transmission zeros can be controlled to achieve a wide stopband. Moreover, the J-inverter can be used to analyze this filter. In addition, in order to increase the stopband bandwidth, two spur lines can be added into the input and output ports. All filters in this thesis are simulated with full-wave electromagnetic simulator, and these filters have been fabricated and measured. The matched results between electromagnetic simulation and measurement can demonstrate the availability of all proposed circuits.
Chen, Tsuhan. "Multidimensional multirate filters and filter banks : theory, design, and implementation." Thesis, 1993. https://thesis.library.caltech.edu/3207/1/Chen_t_1993.pdf.
Повний текст джерелаLu, Hung-Tao, and 盧泓道. "Design of reconfigurable filters." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/r8zcqk.
Повний текст джерела國立中央大學
電機工程學系
104
This thesis used PIN diodes as the on/off switching component and utilized different pathways and boundary conditions to switch between two or more states on the same circuit. This study primarily uses band-stop filters (BSF) as the core of the passive circuitry along with ultra-wideband pass filters (UWBPF), narrow band-pass filters (NBPF), or multi-band stop circuitry to realize switchable circuits using specific design techniques. Since the BSF is the main component in the design of the switchable circuit and its structure is very similar to that of the UWBPF, an entire chapter is dedicated to its introduction and analysis. In the present study, a total of four circuits are detailed. The first circuit switches between a BSF and an UWBPF. The circuit can be further divided into designs with multiple stages (two-stage or three-stage) and according to the size of the bandwidth for a total of six circuit designs. The second circuit (a single/dual-band stop filter switchable design) implements a switching design, which leverages the fact that the electrical length of the BSF can be used to adjust the center frequency and the symmetry properties of the stop band. The third circuit (a switching circuit for BSF and NBPF) is created by first converting the BSF to a design with two subcircuits in parallel and then utilizing the open stub in the middle to implement the NBPF. The last circuit uses the fact that NBPFs have different feed-in methods to implement switching. FR4 PCBs with a thickness of 1.6 mm, dielectric constant of 4.4, and a loss tangent of 0.0245 were used for all implementations.
Ku, Wei-Chih, and 辜偉志. "Design of CPW Filters." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/75476376672733044464.
Повний текст джерела國立臺灣大學
電信工程學研究所
91
In this study, new low-pass, high-pass, and bandpass coplanar-waveguide (CPW) filters are implemented and carefully examined. First, we use various series and shunt stubs to accomplish a novel low-pass filter. The required stub structures are realized by properly etching on both signal stirp and ground planes of CPW. By periodically cascading this low-pass structure, we can improve the characteristics in the stopband. Second, a simple high-pass filter is implemented in the same manner as in low-pass one. The measured and simulated results of the low-pass and high-pass filters are compared and good agreement between them is observed. Finally, we cascade the filter structures mentioned above to realize a CPW bandpass filter. By properly designing the associated low-pass and high-pass structures, one may control the performance of the cascade bandpass filter. The design principle of achieving this bandpass circuit is described and also confirmed by the experimental and theoretical results, which are in good agreement. These proposed planar filters are easy to fabricate and compact, and they are suitable for communication systems.
Parikshith, B. C. "Integrated Approach To Filter Design For Grid Connected Power Converters." Thesis, 2009. http://hdl.handle.net/2005/973.
Повний текст джерелаSu, Wei. "Decomposition of high-order FIR filters and minimum-phase filter design." 2002. http://etd.utk.edu/2002/SuWei.pdf.
Повний текст джерелаTitle from title page screen (viewed Sept 25, 2002). Thesis advisor: L. Montgomery Smith. Document formatted into pages (viii, 135 p. : ill.). Vita. Includes bibliographical references (p. 66-68).
Liang, Zhi-Hong, and 梁志鴻. "Design of Timing-Error-Tolerant Digital Filters for Various Filter Transformations." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/4c2ycw.
Повний текст джерела國立東華大學
電機工程學系
102
In modern VLSI design, especially in system-on-chip, the number of transistors in a single chip keeps increasing thanks to the advance of chip manufacturing technology. However, as the feature size of modern chips shrinks, the circuits become more and more susceptible to noise, wire delay, and soft errors. One of these main problems is timing errors which are caused by process variation, device aging, etc. Such timing error problems can cause system failures. Hence, it is an important issue to solve the timing error problem while maintaining the performance of a chip. This thesis proposes various transformation designs for VLSI digital filters for tolerating multiple timing errors. We have developed a design methodology for VLSI digital filters, which can detect and tolerate multiple timing errors on-line. In order to achieve high performance of the digital filters, different transformations for various digital filter designs are applied. According to the design requirements, we choose the appropriate transformation for the filter in order to improve the performance, while it can still tolerate multiple timing errors. We have applied our techniques to two example digital signal filter designs, including a FIR filter and an IIR filter. Four examples for each circuit are studied and evaluated. We have implemented them using cell-based design flow on TSMC manufacturing technology. The implementation results show that our designs achieve high performance and tolerance of multiple timing errors for digital filters with reasonable cost.
Lin, Chih-Hsin, and 林志新. "The Design of 3-D Perfect Reconstruction Filter Banks, Digital All-Pass Filters, and Complex FIR Digital Filters." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/22345458364143107720.
Повний текст джерела國立臺灣科技大學
電子工程系
87
This thesis presents several novel and efficient techniques for designing three-dimensional (3-D) perfect reconstruction (PR) filter banks, FIR digital all-pass filters, and complex FIR digital filters in minimax sense. The proposed approaches are developed based on the affine and dual affine scaling variants of Karmarkar's algorithm. As for the 3-D perfect reconstruction digital filter banks, two novel techniques are proposed for designing PR filter banks with FIR analysis and synthesis filters having linear phase responses. The designed analysis and synthesis filters are in the minimax sense subject to the perfect reconstruction constraints. With regard to the design of FIR digital all-pass filters, we propose design techniques via minimizing the peak magnitude error and peak phase error simultaneously or minimizing the peak magnitude error and peak group delay error simultaneously. The filter coefficients are obtained by an affine scaling variant of Karmarkar's algorithm. For designing complex FIR digital filters, the original complex approximation is divided into two real ones first. Then the affine scaling variant of Karmarkar's algorithm is also applied to minimize the real part and imaginary part error in minimax sense to get the complex impulse response coefficients. From the simulation examples demonstrated in each chapter of this thesis, the effectiveness of the proposed design techniques for each considered problem can be confirmed.
"Design of optical matched filters." Massachusetts Institute of Technology, Laboratory for Information and Decision Systems, 1991. http://hdl.handle.net/1721.1/1221.
Повний текст джерелаJuo, Da-Jiun, and 卓大釣. "Optimun design-Tuned Harmonic Filters." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/86612933815318465389.
Повний текст джерела淡江大學
電機工程學系
86
Power filters, in general, are the most economical and effective implements to solve the interference problems of harmonic in power sysems. Traditiionally, the engineers designed the filters by trial and error approaches. In these approaches, they did not consider the cost of the filters, the line loss, and ignorde the case that the tuned point is changed with the environment variations. So it makes a great reduction in the total performance. In this thesis, we propose a approach that is to use the optimum method to design the harmonic filters to limit the harmonic with the permissible maximal value (e. g. IEEE Std. 519). The proposed method minimizes the designed filter's total investment cost and power loss such that the harmonic distortion in within an acceptable range. The passive filter, especially the single-tune filter, usually used to eliminate the harmonic in the power systems. It was widely accepted because of its simple configuration and the convenience of setting and maintenance. From the frequency point of view, the subject to design the filter is to prevent the harmonic currents(or voltages), except the base frequency current, flowing into the system. Traditionally, the engineers designed the filters with their experience. Although effective in eliminating the harmonic, these approaches did not consider the constraints on the environment and the operation. So the filters did not well work as expectation, sometimes they even caused series or parallel resonance to interfere other power equipments. We address these problems from the viewpoints of the real operational condition and consider the cost of the filters and power loss with minimum. Simulation results obtained from an industrial distribution system demonstrate the effectiveness of the proposed method.
Chen, Chien-Hao, and 陳建豪. "Design of Metamaterial Bandpass Filters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/kjm97j.
Повний текст джерела國立臺北科技大學
電腦與通訊研究所
98
The study of this thesis is to realize Composite Right/Left-Handed (CRLH) transmission line by using Complementary Split-Rings Resonators (CSRR). Applying this transmission feature to a passive circuit, an asymmetric fed structure of broadband bandpass filter with transmission zeros could be built with smaller size and better function. The designed small filter can be embedded in an antenna or other passive circuits, is expected to improve the overall performance of selectivity. Ansoft High Frequency Structure Simulation (HFSS) and IE3D are applied for simulations with Finite Element Method (FEM). Transforming the calculation of S parameters through MATLAB, it can be show that the refractive index (n), permittivity (ε), and permeability (μ) are all negative with the feature of Metamaterial. Deriving the equivalent circuit model of metamaterial bandpass filters from the equivalent material theory with the simulation software of Advanced Design System (ADS), Moment Method (MOM), and Momentum;We can accurately predict the S parameters with phase variations for left-handed materials further analysis and design.
Chang, Min-Han, and 張閔涵. "Design of Variable Digital Filters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/64608261561566548072.
Повний текст джерела國立高雄大學
電機工程學系碩士班
98
In this thesis, the major research is the design of variable digital filters. During the past decade, variable digital filters have received considerable attention because they were widely used in communication systems, signal processing and image processing. Different responses or delays can be immediately obtained by tuning the variable parameters without the need to design a new one. The designs of variable digital filters are often classified into two categories according to various adjustable situations, which are the variable fractional-delay (VFD) digital filters and the variable fractional-order (VFO) differintegrators. First, Weighted Least-Squares Approach (WLS) is proposed to design the FIR, IIR and Allpass variable fractional-delay filters. This method not only can achieve the desired performance but also minimize the errors in the design range. Then, the topic is focused on the variable fractional-order (VFO) differintegrators. Both FIR differintegrator and IIR differintegrator are designed. They can deal with derivatives or integrals or even compute derivatives and integrals in the same filter by simply adjusting proper parameters. Importantly, the Farrow structure has successfully been applied to implement the variable digital filter systems stated above.
Huang, Yun-da, and 黃韻達. "Design of Variable Digital Filters." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/20760967478361859093.
Повний текст джерела國立高雄大學
電機工程學系碩士班
96
Variable digital filters have received considerable attention in the last decade due to their wide usages in communication systems and image processing. Their important advantage is that they contain a number of parameter in transfer function, which can be used to tune the frequency response immediately on-line without redesigning a new filter. The design of variable digital filters can be classified into two categories, the variable delay response filters and variable magnitude response filters. First, in terms of variable delay response filters, this thesis proposes a new coefficient relationship method to design variable fractional-delay (VFD) FIR filters, which can achieved higher designed performance in large order subfilters and less number of designed coefficient than the latest method. Then, the allpass IIR filters are also introduced to design VFD filters. Second, in the variable magnitude response filters, we propose two methods, binomial series expansion and Taylor series expansion, to design the variable fractional-order differentiators and integrators. Furthermore, in the design of 2D variable digital filters, the variable 2-D subfilters and variable 1-D prototype filters are designed with the same parameter to construct all kinds of variable 2-D FIR filters by using McClellan transformation. They can also be implemented by the proposed structures. Finally, the variable window is also generated which can be applied to design variable transition bandwidth FIR filters. In the thesis, several series expansions are used such that elements of relative matrices can be evaluated in closed-forms and annoying numerical integrals can be all avoided. Then, to find the optimal solution, the weighted least-squares (WLS) approach is used.
Sekar, Vikram. "Advances in Filter Miniaturization and Design/Analysis of RF MEMS Tunable Filters." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9982.
Повний текст джерелаChung, Wei-Han, and 鍾威漢. "Optimal Design of Digital Filters and Digital Filter Banks with Continuous Coefficients." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/29622534109707760244.
Повний текст джерела國立臺灣大學
電信工程學研究所
89
In this thesis,we deal with the problem of designing FIR digital filters ,FIR and IIR filter banks with low-delay property. The design techniques based on modified primal-affine scaling algorithm and modified dual-affine scaling algorithm,in conjunc-tion with approximation schemes,are then developed for solving the resulting nonlinear optimization. For FIR digital filters,we using minimax criteria to formul-ate our design problem. With regard to the FIR and IIR digital filter banks,we using criteria to formulate our design problem,and some simulation results are provided for illustration and comparision. To compare with the L2 design in[26][27],we find the L1 design we proposed have the satisfactory design results.
Chung-Mei, Tseng, and 曾中玫. "Design of color filters and UV-IR filter by simulated annealing method." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/66302088288045509755.
Повний текст джерелаCheng, Tsai Hsu, and 鄭才旭. "Minimax design of IIR digital filters and filter banks with discrete coefficients." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/39101302198631182122.
Повний текст джерела國立臺灣大學
電信工程學研究所
94
Owing to the increasing use of digital signal processing, the design of digital filters and filter banks plays an important role in this filed .In this thesis we present genetic algorithm and WLS algorithm with CORDIC algorithm for QMF banks and non-uniform division filter banks based on 1-D IIR all-pass filters with discrete coefficients . The resulting two-channel QMF banks and non-uniform division filter banks can possess approximately linear phase response without magnitude distortion. The effectiveness of the proposed techniques is achieved by forming an appropriate Chebyshev approximation of a desired phase response . In each chapter,we design some examples and the simulation examples are demonstrated and satisfy,