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 16 of 16 for “"Nonuniform Sampling"”.
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Spectral estimation using nonuniform sampling
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Applications of nonuniform sampling in wideband multichannel communication systems
… is an investigation into utilising randomised sampling in communication systems to ease the sampling rate requirements of digitally processing narrowband signals residing within a wide range of overseen frequencies. By harnessing the aliasing suppression capabilities of such sampling schemes, …
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An investigation of nonuniform sampling of band-limited periodic signals.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1965. B.S.
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A lossy image compression algorithm based on nonuniform sampling and interpolation of the image intensity surface
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Universal Minimum-Rate Sampling and Spectrum-Blind Reconstruction for Multiband Signals
… to Fourier imaging. The proposed spectrum-blind sampling and reconstruction theory addresses issues like existence and optimal design of universal sampling patterns and their conditioning, algorithms and uniqueness conditions for optimal spectral support recovery, as well as algorithms, …
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Optimized techniques for real-time microwave and millimeter wave SAR imaging
… performed for the optimization of uniform and nonuniform sampling (i.e., measurement positions) since existing formulations of SAR resolution and sampling criteria do not account for all of the physical characteristics of a measurement (e.g., 2D limited-size aperture, electric field decreasing …
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Regular and irregular signal resampling
In this thesis, we consider three main resampling problems. The first is the sampling rate conversion problem in which the input and output grids are both regularly spaced. It is known that the output signal is obtained by applying a time-varying filter to the input signal. The existing methods for …
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Sampling and quantization for optimal reconstruction
… thesis develops several approaches for signal sampling and reconstruction given different assumptions about the signal, the type of errors that occur, and the information available about the signal. The thesis first considers the effects of quantization in the environment of interleaved, …
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Magic angle spinning NMR applied to membrane protein 2D crystals : the structure and function of VDAC
… hydrophobic core. Novel methods for processing nonuniform sampling are presented as well as optimized sampling schedules for faster data acquisition. This new methodology is extended first from small peptides to a microcrystalline preparation of GB 1, a 56 residue globular protein. Methods are …
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New methods for fixed-margin binary matrix sampling, Fréchet covariance, and MANOVA tests for random objects in multiple metric spaces
… Generating networks for comparison requires sampling from the space of all binary matrices with the prescribed row and column margins, since enumeration of all such matrices is often infeasible for even moderately sized networks with 20-50 nodes. We propose two new sampling methods for this …
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Informative sensing : theory and applications
Compressed sensing is a recent theory for the sampling and reconstruction of sparse signals. Sparse signals only occupy a tiny fraction of the entire signal space and thus have a small amount of information, relative to their dimension. The theory tells us that the information can be captured …
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Nonuniform generalized sampling
… supported L2 functions from finitely many nonuniform samples of their Fourier transform, so-called Nonuniform Generalized Sampling (NUGS). This framework is based on a recently introduced idea of generalized sampling for stable sampling and reconstruction in abstract Hilbert spaces, which …
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Improving the energy efficiency and reliability of wireless sensor networks using coding techniques
… node. For this reason, the thesis proposes a nonuniform sampling scheme in order to exploit the inherent compressibility and sparse structure of typical signals encountered in many WSNs. Simulations results with real datasets and an energy comparison against the state-of-the-art sampling …
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Mobile sensor systems for field estimation and "hot spot" identification
… two problems related to mobile sensor based sampling and signal estimation: nonuniform sampling and errors in sample location. Uniform grid sampling is often impractical in the context of mobile spatial sampling. As an alternative, I studied [delta]-dense sensor arrangements as a realistic …
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On the analysis of complex networks : fundamental limits, scalable algorithms, and applications
… In Chapters 11-12, we propose an adaptive nonuniform sampling framework, in which time increments between samples are determined as a function of the most recent increments and sample values, obviating the need to track time stamps. We analyze the performance of the proposed method for …