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 15 of 15 for “"Signal processing--Digital techniques"”.
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Digital signal processing techniques for improving the automatic classification of power quality events.
… in this thesis investigates the application of digital signal processing techniques in the power quality automatic classification field, and thus, proposes an optimized automatic monitoring system with an improved accuracy. The proposed monitoring system involves three main sections: detection …
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An R.F. data link
… acquaint myself with transmission and reception techniques and problems. Since all modern and future-envisaged systems work on data transfer, I thought it best to deal with computer digital data transmission/reception. The area which interested me most was the low powered HF radio links and of …
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Signal Encoding and Digital Signal Processing in Continuous Time
This work investigates signal encoding in, and architectures of, digital signal processing systems that function in continuous time (CT). Unlike conventional digital signal processors (DSPs), which rely on a clock to dictate the sampling times of an analog-to-digital converter (ADC) and to provide …
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Compressive sensing based imaging via belief propagation
… accurately recover any compressible or sparse signal from a lesser number of non-adaptive, randomized linear projection samples than that specified by the Nyquist rate. In this work, we demonstrate how CS-based encoding generates measurements from the sparse image signal and the measurement …
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Simulating underwater sensor networks and routing algorithms in MATLAB
<p>Underwater networks are a field that has been gathering attention. Land-based methods of network construction from discovery to advanced routing are all well established. Due to the unique constraints of operating in an underwater environment, many of these tried-and-true approaches need …
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An invariance transformation algorithm for defect characterization of ultrasonic signals for the nondestructive evaluation of concrete
<p>Nondestructive evaluation (NDE) techniques offer cost-effective strategies for monitoring the integrity of a variety of civil infrastructure, such as natural gas and sewer pipelines, without the need to take the system off-line. However, interpretation of NDE signals in terms of the location, …
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Dynamically reconfigurable management of energy, performance, and accuracy applied to digital signal, image, and video Processing Applications
… for implementing dynamically reconfigurable digital signal, image, and video processing systems. The basic idea is to first generate a collection of Pareto-optimal realizations in the EPA/PPA space. Dynamic EPA/PPA management is then achieved by selecting the Pareto-optimal implementations …
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Heartbeat location assistance for electrocardiograms
… at the time of each beat. There are other signals that also exhibit distinctive patterns at the time of each heartbeat; however, the ECG is still the most prevalently used. Analyzing the ECG alone can be problematic because ECG data can be noisy. The noise often makes it appear as if the …
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Multichannel maximum entropy method of spectral analysis applied to offshore structures
… relative to conventional spectral analysis techniques in calculating these cross-spectral estimates and evaluating mode shapes is demonstrated.
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Error and uncertainty in estimates of Reynolds stress using ADCP in an energetic ocean state
… extent to which the environmental and internal processing parameters contribute to this error. It is found that the wave-induced velocities, even when filtered, introduce error variances which are of similar magnitude to that of the Reynolds stresses.
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Modulation classification of digital communication signals
Modulation classification of digital communications signals plays an important role in both military and civilian sectors. It has the potential of replacing several receivers with one universal receiver. An automatic modulation classifier can be defined as a system that automatically identifies the …