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.
Results
Showing 1 to 16 of 16 for “"imaging radar"”.
-
Ultra-Wideband Microwave Imaging Radar System
A novel way to reduce the CPU run time and memory requirement of the nonlinear inverse scattering algorithms is also proposed in this study. We propose a code-division multiplexing scheme for the nonlinear inverse scattering algorithms to reduce the computational complexity by a factor proportional …
-
Design and implementation of a low-cost FMCW imaging radar
Imaging radar systems have been predominantly developed using a coherent pulse radar approach, which is typically associated with expensive and complex hardware that usually requires a large amount of space. Hence, the use of such sensors is reserved to large organizations that can afford to …
-
Assessing the Utility of Imaging Radar for Identifying White Sand Vegetation Structure
… we have attempted to use synthetic aperture radar to create a classification system to locate the white sand vegetation systems. The goal is to be able to apply this method to identify white sand vegetation distribution across South America. The region of focus for this thesis has been in …
-
The performance of an active optical imaging radar in the turbulent atmosphere.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
-
The development of a Radar Digital Unit for the SASARII project
… the design, implementation and testing of the Radar Digital Unit (RDU), a subsystem for the South African Synthetic Aperture Radar II (SASARII). The SASARII is an airborne demonstrator SAR system for a spaceborne SAR and Unmanned Aerial Vehicle (UAV) imaging radar. The demonstrator system …
-
A spaceborne synthetic aperture radar data processor
… and implementation of a Synthetic Aperture Radar (SAR) data processor. The implementation of the processing is based on a standard sequential approach to the problem and employs commonly used algorithms. The processing was done using the C language running on an IBM Compatible Personal …
-
Synthetic Aperture Radar Simulation for Point and Extended Targets
<p>Basic radar systems use electromagnetic wave reflections from targets to determine the motion characteristics of these targets. Synthetic Aperture Radar (SAR) systems use the reflections to produce target images as well. SAR is an imaging radar system that produces high resolution images of a …
-
A validation of ground penetrating radar for reconstructing the internal structure of a rock glacier: Mount Mestas, Colorado, USA
… With the application of ground penetrating radar (GPR) to provide a view of the interior structure of a rock glacier, researchers had ?real? data to verify their models. However, no comparison has been made between a GPR profile and an actual cross-section of a rock glacier. The purpose of …
-
High Angular Resolution Beam Steering Terahertz Antenna Arrays for Imaging Applications
… technology for many applications, including imaging, radar, communications and other sensing applications due to bandwidth availability, penetration of dielectric materials, and short wavelength, enabling smaller structures. There is particular application in automotive radar imaging, where a …
-
An airborne X-band synthetic aperture radar receiver design and implementation
… for use in the South African Synthetic Aperture Radar (SASAR II) project. The SAR will be used to demonstrate the capability of building a high resolution X-hand imaging radar in South Africa. The design starts by investigating the maximum power return from different targets over a swath width …
-
Synthetic Aperture Radar Imaging Simulated in MATLAB
… of generating images using synthetic aperture radar (SAR) simulations coded in MATLAB. The project is supervised by Dr. John Saghri and sponsored by Raytheon Space and Airborne Systems. SAR is a type of imaging radar in which the relative movement of the antenna with respect to the target is …
-
High resolution millimeter wave imaging for self-driving cars
… in 5G millimeter wave (mmWave) technology for imaging in self-driving cars. Specifically, the use of mmWave in 5G has led to the creation of compact phased arrays with hundreds of antenna elements that can be electronically steered. Such phased arrays can expand the use of mmWave beyond …
-
Snowmelt Detection on Alpine Glaciers using Synthetic Aperture Radar Time Series
… glacier melt detection using synthetic aperture radar (SAR) time series. Building on research into melt detection from passive microwave scatterometers over large ice sheets, this study detects melt characteristics from Sentinel-1 SAR backscatter intensity time series over glacier surfaces using …
-
Implementation of Range Autofocus for SAR Radar Imaging
<p>The range calculation for an FMCW radar depends on accurate linear modulation. In some circumstances, linear modulation may not be available and must be corrected for. This paper describes an autofocus technique used to correct for phase error due to non-linearities in the components of a FMCW …
-
Ionospheric imaging with compressed sensing
… from compressed sensing can benefit ionospheric imaging in two ways. Compressed sensing suggests signal reconstruction techniques that take advantage of sparsity, offering us new ways of interpreting data, especially for undersampled problems. One example is radar imaging. We explain how …
-
Enhanced physics modelling and multistatic data integration for breast tissue reconstruction in microwave radar imaging
Microwave breast imaging offers a low-cost, portable, and non-ionizing alternative for breast cancer detection by exploiting the contrast in dielectric properties between malignant and healthy tissues. Its simplicity and safety make it particularly attractive for screening in under-served or remote …