Results 31 to 40 of about 21,138 (215)

Sparse representation-based synthetic aperture radar imaging [PDF]

open access: yes, 2011
There is increasing interest in using synthetic aperture radar (SAR) images in automated target recognition and decision-making tasks. The success of such tasks depends on how well the reconstructed SAR images exhibit certain features of the underlying ...
Cetin, Mujdat   +3 more
core   +1 more source

Origami Microwave Imaging Array: Metasurface Tiles on a Shape‐Morphing Surface for Reconfigurable Computational Imaging

open access: yesAdvanced Science, 2022
Origami is the art of paper folding that allows a single flat piece of paper to assume different 3D shapes depending on the fold patterns and the sequence of folding.
Suresh Venkatesh   +4 more
doaj   +1 more source

Resolving single molecule structures with Nitrogen-vacancy centers in diamond. [PDF]

open access: yes, 2015
We present theoretical proposals for two-dimensional nuclear magnetic resonance spectroscopy protocols based on Nitrogen-vacancy (NV) centers in diamond that are strongly coupled to the target nuclei.
Cai, J, Kost, M, Plenio, MB
core   +1 more source

A sparse coding approach to inverse problems with application to microwave tomography

open access: yesCoRR, 2023
IAR 60th Anniversary: Prospects for Low Frequency Radio Astronomy in South ...
Caiafa, César Federico   +1 more
openaire   +3 more sources

Compressive Sensing Radar Imaging With Convolutional Neural Networks

open access: yesIEEE Access, 2020
In the area of radar imaging at any frequency band from microwave to optics, the technique of compressive sensing (CS) enables high resolution with reduced number of antenna elements and measurements.
Qiao Cheng   +3 more
doaj   +1 more source

Imaging With WiFi

open access: yesIEEE Access, 2019
A new method of creating microwave imagery by capturing the signals emitted by a small set of wireless WiFi transmitters is presented. The imaging technique leverages the fact that the signals emitted by separate WiFi transmitters are sufficiently ...
Stavros Vakalis   +2 more
doaj   +1 more source

Sparse Active Rectangular Array with Few Closely Spaced Elements

open access: yes, 2018
Sparse sensor arrays offer a cost effective alternative to uniform arrays. By utilizing the co-array, a sparse array can match the performance of a filled array, despite having significantly fewer sensors.
Koivunen, Visa, Rajamäki, Robin
core   +1 more source

Compressed sensing imaging techniques for radio interferometry [PDF]

open access: yes, 2009
Radio interferometry probes astrophysical signals through incomplete and noisy Fourier measurements. The theory of compressed sensing demonstrates that such measurements may actually suffice for accurate reconstruction of sparse or compressible signals ...
A. M. M. Scaife   +39 more
core   +3 more sources

Efficient 3D Image Reconstruction for Near-Field Microwave Imaging Using Dynamic Metasurface Antenna

open access: yesIEEE Access, 2022
In this paper, rapid reconstruction of a three-dimensional (3D) image of a scene for near-field microwave imaging using a dynamic metasurface antenna (DMA) is addressed.
Amir Masoud Molaei   +3 more
doaj   +1 more source

The effect of hardware-computed travel-time on localization accuracy in the inversion of experimental (acoustic) waveform data

open access: yes, 2017
This study aims to advance hardware-level computations for travel-time tomography applications in which the wavelength is close to the diameter of the information that has to be recovered. Such can be the case, for example, in the imaging applications of
Hämäläinen, Timo D.   +2 more
core   +1 more source

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