Searched for: subject:"SAR"
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Liu, Angqi (author)
The ΔΣ analog-to-digital converter (ADC) is widely used in audio applications for its high resolution. However, it is less energy efficient compared to Nyquist Rate ADCs. The growing demand for portable and wearable devices poses a more stringent power-efficient requirement on the audio system, and the traditional ADCs architecture is hard to...
master thesis 2020
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Yuan, Yan (author)
Oceans cover a significant part of the Earth's surface. The coupling between the upper ocean and the atmosphere is very complicated with defied theoretical understanding, while it is essential for climate studies, weather prediction, and marine ecosystems. With the advent of spaceborne Synthetic Aperture Radar (SAR) systems, surface signatures...
master thesis 2020
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de Roda Husman, S. (author)
Ice jam events can be devastating for the environment, human infrastructure, and local population. During breakup season, it is of great importance to be informed about the river ice cover condition in order to mitigate breakup flood risk. The Athabasca River near FortMcMurray, located in Alberta, is particularly prone to ice jam events and...
master thesis 2020
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Wang, Shuang (author)
The neuromodulation modality based on the focused ultrasonic stimulation (FUS) has gained its interests for being non-invasive while having unprecedented high spatial resolution and deep penetration. The commercially available image-guided FUS device for neuromodulation setups are normally bulky, by employing an 1-D array transducer element to...
master thesis 2020
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Koliolios, Nikiforos (author)
Soil Moisture is a key hydrological variable since it controls the interactions between the atmosphere, biosphere and hydrosphere. It is responsible for the partitioning of precipitation into evaporation, transpiration, percolation and run-off. Soil Moisture monitoring is used to indicate droughts in vegetated areas and is an important parameter...
master thesis 2020
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Yuan, Yan (author)
River width is an important indication for water storage, with the development of remote sensing techniques, estimating river width in a large area becomes possible. In this report, fully-focused SAR altimetry data with an advantage of high spatial resolution is applied to compute river width for the first time. Methodology developed based on...
student report 2019
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Jacobs, Bas (author)
Antenna design for Ka-band SAR systems used in earth observation missions is demanding for two reasons. A narrow beamshape results in a large aperture, and the frequency band dictates a short spacing between neighboring radiating elements. In our case, this leads to a requirement of more than a million radiating elements. In this thesis it is...
master thesis 2019
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van der Zee, Thijs (author)
Flooding is a very costly natural disaster especially when it hits urban areas. Yet synthetic aperture radar (SAR) based flood mapping barely works in urban areas. Buildings and man made objects have similar backscatter signatures as still standing water. This makes them hard to distinguish from one another. Structures can block the visibility...
master thesis 2019
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Tatu, Cristian Ionut (author)
Analog-to-digital converters are important blocks in any electronic system which act as a bridge between analog signals and digital processors. The conventional SAR ADC employs a binary search algorithm and has emerged as the most suitable solution for low-power applications, due to its excellent power efficiency. The proposed ADC architecture...
master thesis 2019
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Verhoeven, Corné (author)
Cryosat-2 altimetry helps to assess the state of the Cryosphere by measuring elevation and elevation change. The SARIn mode of the Cryosat-2 SIRAL instrument is specifically designed for rough topography that we encounter near ice sheet margins. Various SARIn data products (Full Bit Rate (FBR), Level 1b and Level 2) are provided by ESA, where...
bachelor thesis 2018
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van Heyningen, Jeroen (author)
Humanitarian crises related to building and infrastructure damage, i.e. natural hazards and collateral damage during warfare, result in many hundreds of thousands of casualties on a yearly base. Earthquakes, for example, are responsible for taking around 50.000 lives on a yearly base due to falling debris and collapsing buildings, making them...
master thesis 2018
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Scherpenisse, Brendan (author)
Repeat-pass acquisitions with coherent Synthetic Aperture Radar (SAR) systems, preserving both phase and amplitude, are more readily available than ever (Bruzzone, 2016). Phase measurements from SAR systems have seen widespread use in the Interferometric Synthetic Aperture (InSAR) technique to measure deformations and elevations since the late...
master thesis 2018
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Caldarella, Nina (author)
Direct measurement of ocean surface velocity from space with a Synthetic Aperture Radar has shown to be a promising method to observe ocean surface currents. In this thesis report a method for Total Surface Current Vector (TSCV) retrieval using an experimental Bidirectional (BiDi) Along-Track Interferometric (ATI) acquisition mode with TanDEM-X...
master thesis 2018
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Kwant, Martijn (author)
The North Sea is known for its marine activities, which need ocean data for safe operations. The ocean surface is described using the two-dimensional wave spectrum. This ocean wave spectrum can be estimated using wave buoys, wave models or remote sensing techniques. Wave buoys and numerical models are known to contain inaccuracies, which...
master thesis 2017
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Shi, Yixin (author)
This thesis presents a Low-Power Area-Ecient SAR-Assisted Hybrid ADC for ultra-<br/>sound imaging systems. This ADC combines a 5-bit SAR ADC per channel with a 4-bit single-slope ADC that produces the converter's LSBs and is implemented using shared hardware. The number of unit capacitors of the proposed ADC is about 1/16th of that of a 9-bit...
master thesis 2017
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Koch, R. (author), De Gelder, L. (author)
This thesis is part of the ”Ultra Wideband Synthetic Aperture Radar Imaging” project of the bachelor Electrical Engineering graduation program in the fourth quarter of the teaching year 2016-2017. Synthetic aperture radar (SAR) is used to make images of the environment of a car. These images are, in combination with GPS, needed to give an...
bachelor thesis 2017
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Cancrinus, Nick (author), Max, Gyula (author)
Nowadays, localization of cars is mostly done using GPS. Some major disadvantages of this method are that it is not very accurate and that it cannot be used indoors. These disadvantages do not form a major problem when an active human driver is controlling the car, but will become more critical when the autonomy of vehicles increases. The goal...
bachelor thesis 2017
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Saboerali, T. (author)
The MRI scanner with an ultrahigh magnetic field of 7T not only increases the image resolution but it also increases the Specific Absorption Rate (SAR) of the patient. In other words, the body temperature of the patient increases due to the absorption of heat produced by the 7T MRI scanner. This is dangerous for the health of the patient. In...
master thesis 2017
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Wieffering, Tristan (author), Arriëns, Roy (author)
A system has been developed that utilises the techniques of Ultra Wideband and Synthetic Aperture Radar to produce top view images of a scene using measurements from the side. The system consists of the PulsON P410 radar module, a set of antennas, a moving platform and an imaging algorithm. This thesis will cover all the aspects of the data...
bachelor thesis 2017
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Ursulean, M. (author)
The thesis analyzes the design challenges that arise when developing high-speed ADCs and shows, through an extensive architecture study, that the SAR topology can be used with a sampling rate of 2.5GS/s if asynchronous processing and a multi-bit per cycle approach are adopted. The transistor-level implementation and simulation of a 6-bit SAR ADC...
master thesis 2016
Searched for: subject:"SAR"
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