Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1970 for “"Filters"”.
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Micromachined microwave filters
… thesis is on low loss transmission lines and filters, based on a square coaxial transmission line which is made only of metal, avoiding dielectric and radiation losses. The metal structure inside the square coaxial transmission line is supported by stubs, which provide the mechanical support …
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Weighted median filters and related nonlinear filters with applications in image processing
In the last few decades, a number of nonlinear filters were presented, especially in the electrical engineering literature. One of the most popular nonlinear filters is weighted median filtering. The main objective of this thesis is to analyse the statistical and deterministic properties of the …
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High-Performance Digital Filters
Digital filters, both finite impulse response (FIR) and infinite impulse response (IIR), are widely used in many applications. The motivation for this work lies in the importance of developing methods to reduce the complexity in implementing these types of filters.
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Vibrating-string electromechanical filters
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1952.
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Gain-distributed feedback filters
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Advancing acoustic filters for 5G front-ends: Lithium niobate piezoelectric MEMS resonators and filters
… the piezoelectric acoustic or MEMS resonators, filters, and multiplexers, as they remain essential for accessing the crowded RF spectrum with low loss, high interference rejection, and small form factors. This dissertation reports on the design, fabrication, and demonstration of a new class of …
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Digitally controlled "programmable" active filters
In this research a general purpose digitally controlled analog filter is presented. The novel design is a cascade of second order sections that are individually programmed to achieve any filtering topologies. Two-binary words are used to control the pole frequency co p and selectivity Qp of each …
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Bloom Filters for Filesystem Forensics
… capacity just exacerbate the problem. Bloom filters are space-efficient, probabilistic data structures that can represent data sets with quantifiable false positive rates that have the potential to alleviate the problem by reducing space requirements. We provide a framework using Bloom …
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Gap Waveguide Array Element Filters
… the design and analysis of three gap waveguide filters that are integrated into larger transmitter systems in order to prevent out of band emissions. These types of filters, which are directly integrated with antenna array elements are known as array element filters. The first filter is a third …
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Silicon-based tunable optical filters
… of a new class of silicon-based tunable optical filters. For this purpose a Fabry-Perot structure was chosen and implemented as a thin-film interference filter. The filter layers were configured as a self-supporting square membrane with side lengths of a few hundred microns. The approach …
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Orthogonalization techniques for adaptive filters
The rate of convergence and the computational complexity of an adaptive algorithm are two essential criteria by which the performance of an adaptive filter is measured. These objectives conflict with one another; each property is successfully achieved at the expense of the other. The principal …
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Parameter learning with particle filters
Common applications of asset-pricing models in practice rely on recalibrating model parameters periodically for effective risk management. Yet, these model parameters are often assumed to be constant over time, thereby countering the notion of readjusting these values. A possible solution to this …
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Asymptotics of wavelets and filters
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1998.
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Two-dimensional nonrecursive digital filters.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering, 1973
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Alkali attack on ceramic filters
Experiments were performed to determine a suitable binder material for silicon carbide-based ceramic filter. These experiments included exposure of 42% and 60% alumina, aluminosilicates to potassium and sodium containing environments for the purpose of determining the phases that would form and to …
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Optimizing performance of ceramic pot filters in Northern Ghana and modeling flow through paraboloid-shaped filters/
… work aimed to inform the design of ceramic pot filters to be manufactured by the organization Pure Home Water (PHW) in Northern Ghana, and to model the flow through an innovative paraboloid-shaped ceramic pot filter. PHW is an organization dedicated to improving the drinking water quality for …
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PIC 18F452 implementation of digital filters
… the designing and implementation of two types of filters for the PIC 18F452 microcontroller. The main purpose of this research is to implement a floating-point least mean square (LMS) error adaptive filter and its secondary goal is a fixed-point implementation of finite impulse response (FIR) …
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Miniaturised bandpass filters for wireless communications
… development and realization of RF and microwave filters, which have not only sustained but fuelled microwave filter research over the many years. These developments have encouraged new solutions and techniques for the realization of compact, low loss, highly selective RF and microwave bandpass …
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BPSK system analysis using MEMS filters
… be achieved by using banks of micromechanical filters. These small filters are post-CMOS compatible, allowing hundreds of high-Q filters to be incorporated over a typical RF transceiver die. Selection of these filters allows the band, channel, and bandwidth to be rapidly changed in operation. …
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