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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 33 for “"Matched Filtering"”.
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Blind multidimensional matched filtering for wireless channelswith multiple antennas
… statistics of the received signal. The Blind Matched Filter (BMF) receiver on the other hand makes use of an adaptive algorithm, i.e. the Constant Modulus Algorithm (CMA), to estimate the channel without the need for an implementation inefficient approach as stated above. The BMF method …
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Virtual matched filtering : a new hybrid CDMA code acquisition technique under Doppler and higher loads
… is equivalent to a very long physical matched filter but is relatively immune to the Doppler degradation. These features would be shown by analysis results. We also propose two strategies in conjunction with the new virtual matched filtering, and compare their performance to known code …
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Automatic Detection of Elongated Objects in X-Ray Images of Luggage
… objects (detonators) in x-ray images using matched filtering, the Hough transform, and information fusion techniques. A sophisticated algorithm has been developed for detonator detection in x-ray images, and computer software utilizing this algorithm was programmed to implement the detection …
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Data compressive paradigm for spectral sensing and classification using electrically tunable detectors
… arbitrarily specified MS sensing (e.g., spectral matched filtering, slope sensing, multicolor sensing, etc.) without using any spectral filters and possibly under constrained acquisition times.
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Topics in the Detection of Gravitational Waves from Compact Binary Inspirals
… via a signal processing technique referred to as matched filtering.</p> <p>Matched filtering requires large banks of signal templates that are faithful representations of the true gravitational waveforms produced by astrophysical binaries. The accurate and efficient production of templates is thus …
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Time domain synthetic aperture radar image processing using fast factorised backprojection
… Aperture Radar (SAR) focusing is fundamentally a matched filtering process which can be performed both in the spatial or spectral domain. Spatial domain SAR focusing techniques like filtered backprojection can, in theory, completely recover the scene from data with an infinite bandwidth acquired …
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Three dimensional reconstruction of plant roots via low energy x-ray computed tomography
… of a root segment, I propose a novel multi-scale matched filtering with a two-dimensional Gaussian kernel to enhance the root system. The filter assumes different orientations to highlight the root segments grown in different directions. The roots are isolated from the background by manual …
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Topics in Gravitational-Wave Astrophysics
… wave detection searches. Beyond</p> <p>matched-filtering, there is extensive processing of the filter output before a detection</p> <p>candidate can be confirmed. We utilize recent results from Numerical Relativity to</p> <p>study the ability of LIGO searches to make detections, using …
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A recursive matched-filter to systematically explore a volcanic long-period earthquake swarm
The matched-filter technique is an effective way to detect repeats, or near-repeats, of a seismic source, but prior identification of an event from that source to use as a template is required. We propose a recursive matched-filter approach to systematically explore earthquake swarms, here applied …
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Time Series Analysis of Vegetation Change using Hyperspectral and Multispectral Data
… maps were produced using Mixture-Tuned Matched Filtering. The results were assessed visually and mathematically. Through visual inspection of the classification maps, increasing lodgepole pine mortality over time was observed. The results were quantified using confusion matrices …
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Automated detection of a crossing contact based on its Doppler shift
… be exploited to improve the detection process by filtering out contacts that do not exhibit these characteristics. Cross-correlation (matched filtering) of contact LOFARgrams with templates generated in situ with Doppler compression/dilation is used to achieve this. Velocity information and the …
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Optimization of coded signals based on wavelet neural network
… for improving range resolution for target. Matched filtering of binary phase coded radar signals create undesirable sidelobes, which may mask important information. The application of neural networks for pulse compression has been explored in the past. Nonetheless, there is still need for …
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Waveform Diversity and Range-Coupled Adaptive Radar Signal Processing
… is employed relative to both conventional matched filtering and sequentially adapting in angle and then range. The same mathematical framework is utilized to develop Time-Range Adaptive Processing (TRAP) algorithm which is capable of simultaneously adapting in Doppler frequency and range. …
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A signal processing approach to ultrasound localization microscopy
… as a signal processing problem and introduce a filtering operation that is capable of separating microbubble contrast agents into different subgroups based on their vector velocities while simultaneously offering blood velocity mapping at super resolution, without tracking individual …
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Study of the seismicity in the Western Alps by developing and applying an automatic earthquake detection and location Method
… the beam-formed network response with template matched-filtering to enhance detection capabilities. We applied our method to the study of the seismicity of the Western Alps, and we claim that it can be applied in many different contexts to quickly get high quality earthquake catalogs. The study …
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Digital video moving object segmentation using tensor voting: A non-causal, accurate approach
… order of the moving objects in the video clip. Matched filtering and detection are applied to reduce the TS map into occluding and disoccluding detections. The technique is computationally exhaustive, but may find use in off-line video object segmentation processes. The use of …
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Anti-jamming MTI radar using variable pulse-codes
… recover this performance loss several receiver filtering and digital signal processing techniques are tested. PN code selection for optimum filter performance is explored resulting in a 7-dB signal-to-clutter performance recovery for a 32-bit code. Digital pulse compression, matched filtering, …
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Gravitational Waves and Inspiraling Compact Binaries in Alternative Theories of Gravity
… of Relaxed Einstein Equations: DIRE), and Matched Filtering.</p><p>In Part III, we calculate the explicit equations of motion for non-spinning compact objects: neutron stars or black holes) to 2.5 post-Newtonian order, or $O(v/c)^5$ beyond Newtonian gravity, in a general class of …
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Multi-Scale Mapping of Diagenetic Processes in Sandstones Using Imaging Spectroscopy: A Case Study of the Frontier Formation (Wyoming, U.S.A.) and the Utrillas Formation (Burgos, Spain)
… Spectral Angle Mapper (SAM) and Mixture Tuned Matched Filtering (MTMF) classification algorithms were applied to quantify facies and mineral abundances in the Frontier Formation. MTMF is the most effective and reliable technique when studying spectrally similar materials. Classification results …
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