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 42 for “"IIR"”.
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New Adaptive Iir Filtering Algorithms
A family of adaptive IIR filtering algorithms is proposed based on the Steiglitz-McBride identification scheme. The algorithms are shown to be close approximations of one another for slow adaptation. Because of the non-vanishing gain, they are suitable for filtering applications and are simple to …
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Adaptive Control using IIR Lattice Filters
This work is a study of a hybrid adaptive controller that blends fixed feedback control and adaptive feedback control techniques. This type of adaptive controller removes the requirement that information about the disturbance is known apriori. Additionally, the control structure is implemented in …
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Improvements in Adaptive IIR Filtering: Theory and Application
Characteristics of the mean-square error surface in adaptive digital filters determine how well a gradient algorithm performs within a given filter structure, i.e., if the surface has steep slopes and contains local minima, a gradient algorithm will have difficulty reaching the global minimum. It …
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Functionalized Polyisobutylene: From Synthesis to Properties and Applications
… and organisms to its surface. Butyl rubber (IIR) is a copolymer of isobutylene (IB) with small percentages of isoprene (IP). Typically these IP units serve as sites for the covalent cross-linking of the IIR, in addition can serve as sites for further functionalization of IIR. These …
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Curiosity driven search experiences
… and interactive information retrieval models (IIR) have failed to represent them because they were created observing people in work related scenarios, and assuming that search is always a rational decision making process and with an extrinsic utilitarian value. The research described in this …
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Design and Implementation of Complexity Reduced Digital Signal Processors for Low Power Biomedical Applications
… use of minimum phase Infinite-Impulse-Response (IIR) decimators is proposed where the hardware complexity is massively reduced compared to the conventional FIR decimators. In addition, the non-linear phase effects of these filters are also investigated since phase non-linearity may distort the time …
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Iterative least squares algorithms for digital filter design.
… algorithms to simplify and improve the design of IIR digital filters and M-band cosine modulated filter banks. These algorithms are based on the Iterative Least Squares (ILS) approach. We first review the various Iterative Reweighted Least Squares (IRLS) methods used to design Chebyshev and …
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A new sufficient-order blind equalization scheme
… by including both infinite impulse response (IIR) and FIR filters in the equalizer structure. However, these techniques are computationally demanding and are very complex for a hardware implementation. In this thesis a new sufficient-order blind equalization scheme is proposed that attempts to …
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Low power, reduced complexity filtering and improved tracking accuracy for GNSS
… using a minimum-phase Infinite Impulse Response (IIR) filter. For Global Positioning System (GPS) civilian signals, the use of IIR filters does not deleteriously affect the positional accuracy. However, in the case where an IIR filter was deployed in a GLObalnaya NAvigatsionnaya Sputnikovaya …
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A system identification approach to non-invasive central cardiovascular monitoring
… algorithms for a class of 2-channel IIR and Wiener systems. In particular, this thesis will present blind identifiability conditions for a class of 2-channel IIR and Wiener wave propagation systems and develop the associated blind identification algorithms. It will be shown that the …
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The Recycling GTPase, RAB-10, Regulates Autophagy Flux in <i>Caenorhabditis elegans</i>
… and blocked tissue remodeling in <em>daf-2/IIR</em> mutants. The goal of this screen was to identify new or previously characterized endocytic genes that function in autophagy, further elucidate the mechanism by which these genes control autophagy, and enhance our understanding as to how …
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Study of circularly symmetrical two-dimensional digital filters possessing separable denominator transfer functions
… filters as an independent product. Only IIR Filters have been considered for this purpose due to their capability of approximating the required response with low order filters and also their flexibility in terms of altering filter parameters to obtain new filters. The filters have been …
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A new technique to reduce phase distortion of recursive filters for video and image processing
IIR filters require less multiplication and less memory to perform filtering than their FIR counterparts. On the other hand, IIR filters have nonlinear phase response as a side effect. This is a major concern in applications such as video and image processing. In this thesis, a new method of …
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High-Performance Digital Filters
… 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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Role of BEC-1/Beclin 1 and Autophagy Genes in <i>C.elegans</i> Germline Cell Proliferation
… pathways, but interacts with components of DAF-2/IIR signaling pathway, to potentiate germline proliferation during development. Moreover, BEC-1/BECN1 requires DAF-18/PTEN but not DAF-16/FOXO for this function and can both promote and inhibit germ cell proliferation depending on the genetic mutant …
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Structures and algorithms for two-dimensional adaptive signal processing
… suppression. Emphasis is placed both on FIR and IIR structures with primary benchmark issues being speed of convergence, computational complexity, and structural flexibility.
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Využití techniky C2H při implementaci algoritmů pro FPGA
… C2H několik struktur číslicových filtrů FIR a IIR, u kterých je provedeno porovnání z hlediska využitých zdrojů FPGA, maximální frekvence, latence, složitosti implementace a získaného zrychlení vůči samotnému procesoru Nios II. Také je vytvořen příklad pro zpracování obrazu pomocí lokálních …
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Iterative design of l(p) digital filters
… for the design of Finite (FIR) and Infinite (IIR) Impulse Response digital filters. The proposed algorithms are based on the idea of breaking the lp filter design problem into a sequence of approximations rather than solving the original lp problem directly. It is shown that one can …
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Uniform FIR approximation of causal Wiener filters with applications to causal coherence
… of the FIR causal Wiener lters to the full IIR causal Wiener filter is investigated as filter length goes to infinity. The main results prove Lp convergence of the frequency responses for p = 1, 2, [infinity] under certain Hölder continuity conditions on the power spectra, as well as give …
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