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 8 of 8 for “"Spatial Aliasing"”.
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Nonlinear filtering for narrow-band time delay estimation
… difference of arrival (TDoA) between pairs of spatially separated sensors - this work improves those estimates by independently tracking each TDoA using a Bayesian filter. This tracking is particularly useful for overcoming spatial aliasing, which results from tracking narrowband, high …
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An experiment in state-space vibration control of steady disturbances on a simply-supported plate
… controller are addressed including temporal and spatial aliasing considerations.
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Weighted arrays for modal isolation and active control of complex structures
… and compared. The deleterious effects of spatial aliasing, the performance as a function of the array size, the sensitivity to random perturbations, and the effects of transducer failure are explored.
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Sensor Array Processing with Manifold Uncertainty
<p>The spatial spectrum, also known as a field directionality map, is a description of the spatial distribution of energy in a wavefield. By sampling the wavefield at discrete locations in space, an estimate of the spatial spectrum can be derived using basic wave propagation models. The observable …
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Feature extraction for range image interpretation using local topology statistics
… deviation in order to minimise the occurrence of spatial aliasing during the sampling stages and to provide a better continuity within the descriptor. Moreover, surface normals can be computed from each of the keypoint location, allowing the local 3D pose to be estimated and corrected within the …
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Geophysical Imaging of Earth Processes: Electromagnetic Induction in Rough Geologic Media, and Back-Projection Imaging of Earthquake Aftershocks
… the electromagnetic responses of textured and spatially correlated, stochastic geologic media are herein presented. The modelling results demonstrate that the resulting electromagnetic responses present a power law distribution, rather than a smooth response polluted with random, incoherent …
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Space Time Processing for Third Generation CDMA Systems
… of these by processing the signal both in the spatial and temporal domain. An ideal 2-D receiver would perform joint space-time processing, but at the price of high computational complexity. In this dissertation we investigate computationally simpler technique termed as a Beamformer-Rake. In a …
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Impedance- and spatial-domain aliasing in interference management techniques
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01