Spelling suggestions: "subject:"digital filters"" "subject:"figital filters""
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Digital VOR phasemeter and AF signal generator.January 1980 (has links)
W.K. Lee. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1980. / Bibliography: leaves 107-111.
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Design of an asynchronous third-order finite impulse response filterOren, Joel A. 08 February 1994 (has links)
With the increased demand for complex digital signal processing systems,
real-time signal processing requires higher throughput systems. In the past, the
throughput has been increased by increasing the clock rates, but
synchronization can become increasingly more difficult. Recently there has
been renewed interest in designing asynchronous digital systems. In an
asynchronous system, there is no global clock, and all modules communicate
through handshaking. In this thesis we demonstrate an implementation of an
FIR filter using asynchronous digital circuit techniques. These asynchronous
design techniques are used to test whether a practical signal processing filter
can be implemented with asynchronous logic. A third-order four-bit filter is
developed and simulated with SPICE, comparing favorably with other available
technologies in speed and power consumption. Although in practice 8-16 bits
are needed, this work is sufficient to demonstrate the feasibility of asynchronous
circuits for filtering applications. A chip is laid out in 2 micron CMOS, and
testing shows that it has a speed-power product comparable with asynchronous
designs fabricated by others. / Graduation date: 1994
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Multi-rank wavelet filtersLeung, Hung-kwan. January 2001 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 80-81).
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PIC 18F452 implementation of digital filtersBose-Mullick, Vikram A. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains xiii, 148 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 97-98).
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Multi-rank wavelet filters梁鴻鈞, Leung, Hung-kwan. January 2001 (has links)
published_or_final_version / Mathematics / Master / Master of Philosophy
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A four-pole, two-zero Inverse Chebyshev active filterPerry, David Lester January 1981 (has links)
No description available.
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NEW METHODS OF NONLINEAR DIGITAL IMAGE RESTORATIONHawman, Eric Grant January 1981 (has links)
In this dissertation we develop four new methods for image restoration. The common feature of all these methods is that the object estimates have a nonlinear dependence on the image data and that iterative methods of solution are needed. The restoration algorithms have been compared with some previously developed methods by means of computer simulations. The problem of restoring noisy images where the spread function is known is treated in two ways. First, this restoration problem is regarded as a constrained least squares optimization problem. Different methods of enforcing smoothness on the restoration are considered. It is shown that the use of an arc length penalty function permits better restoration of edges than can be obtained by pure quadratic penalty functions. We also treat some methods for enforcing upper and lower bounds on the restoration. The second approach taken on the known spread function restoration problem is statistical. Here we consider the image forming system as a communication channel in which the unknown object to be estimated is one member from a random ensemble. We propose a new approach to restoration based on maximum entropy methods. This new approach allows one to easily synthesize estimators to comply with various prior constraints the image restorer wishes to impose. We show how this new maximum entropy synthesis procedure relates to previous uses of maximum entropy principles for the restoration problem. The problem of restoring atmospherically degraded images is treated in Chapter 4. Here, in addition to random noise in the image, we are faced with a randomly changing spread function. We formulated two algorithms for restoration that have better noise immunity than any previously proposed methods. Both proposed methods are based on processing a series of short exposure speckle images. The first method is an ad hoc successive least squares estimation procedure which uses the second order moments of the image and the spread function discrete Fourier transforms (DFT). The second method, which performs even better than the first, is a maximum likelihood estimation algorithm to find the object's DFT. The maximum likelihood algorithm uses both the first and second moments of the transfer function and the image's DFT.
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Morphological approaches to linear filter implementation and template matchingKhosravi, Mehdi 08 1900 (has links)
No description available.
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Wavelet transforms for image codingSilva, Eduardo Antonio Barros da January 1995 (has links)
No description available.
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Linear programming design of recursive digital filters.Swanton, David Francis. January 1973 (has links)
No description available.
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