Results 51 to 60 of about 108,062 (269)

Phase‐difference measurement‐based angle of arrival estimation using long‐baseline interferometer

IET Radar, Sonar & Navigation, 2023
This article presents a direction‐finding method based on phase difference measurement for wide‐ranging applications of electronic intelligence. By including three processing steps of rotating, re‐scaling, and rounding of phase plane, the proposed method
Van‐Sang Doan, Thien Huynh‐The, Van‐Phuc Hoang, Jiri Vesely   +3 more
doaj   +1 more source

Gravitational Wave Burst Source Direction Estimation using Time and Amplitude Information [PDF]

, 2008
In this article we study two problems that arise when using timing and amplitude estimates from a network of interferometers (IFOs) to evaluate the direction of an incident gravitational wave burst (GWB).
Carroll, E. Katsavounidis, J. Kraus, J. Markowitz, K. S. Thorne, L. Cadonati, M. Zanolin, Thompson   +7 more
core   +3 more sources

Angle of Arrival Estimation for Terahertz-enabled Space Information Networks

2022 IEEE Future Networks World Forum (FNWF), 2022
Space information networks (SINs) empowered by Terahertz (THz) frequencies are expected to play a vital role in next-generation wireless space networks due to the unique transmission characteristics and coverage extension capabilities of SINs, owing to their high altitudes. Also, utilizing THz frequencies allows the usage of more bandwidth.
Nayir, Hasan, Kurt, Gunes Karabulut, Gorcin, Ali   +2 more
openaire   +3 more sources

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Sidelobe Suppression for Robust Beamformer via The Mixed Norm Constraint [PDF]

, 2011
Applying a sparse constraint on the beam pattern has been suggested to suppress the sidelobe of the minimum variance distortionless response (MVDR) beamformer recently.
Liu, Yipeng, Wan, Qun
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Angle-of-Arrival Estimation in Formation Flying Satellites: Concept and Demonstration

IEEE Access, 2019
One of the challenges of future space missions is the deployment of instruments distributed across multiple satellites that fly in an autonomous formation.
Alexandru Mihai Crisan, Alexandru Martian, Remus Cacoveanu, Daniela Coltuc   +3 more
doaj   +1 more source

Performance Analysis of Interferometer Algorithm under Phase Measurement Error

Applied Sciences, 2021
Direction finding has been extensively studied over the past decades and a number of algorithms have been developed. In direction finding, theoretic performance prediction is a fundamental problem.
Chan-Bin Ko, Joon-Ho Lee
doaj   +1 more source

Angle-of-arrival estimation in presence of multipath

Electronics Letters, 1991
The Thomson method of multiple-windows is applied to the problem of angle-of-arrival (AOA) estimation at low grazing angles, and in the presence of combined specular and diffuse multipath. Experimental data are used, collected by means of a 32 element sampled aperture antenna system operating at X band.
A. Drosopoulos, S. Haykin
openaire   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source