Results 51 to 60 of about 12,859 (184)

A Simple Cross Correlation Switched Beam System (XSBS) for Angle of Arrival Estimation

IEEE Access, 2017
We propose a practical, simple and hardware friendly, yet novel and efficient, angle of arrival (AoA) estimation system. Our intuitive, two-phases cross-correlation-based system requires a switched beam antenna array with a single radio frequency ...
Ahmed Badawy, Tamer Khattab, Daniele Trinchero, Tarek M. Elfouly, Amr Mohamed   +4 more
doaj   +1 more source

Photonic Frequency Down Conversion Approach to Measure Microwave Signal Angle of Arrival

IEEE Photonics Journal, 2022
This paper presents an angle-of-arrival (AOA) measurement system based on microwave photonic frequency down conversion. It has the novelty of no LO is needed for the frequency conversion process. Instead, a ramp waveform is used to shift the frequency of
Chongjia Huang, Erwin Hoi Wing Chan
doaj   +1 more source

How Flexible Are Grammars Past Puberty? The Case of Relative Clauses in Turkish‐American Returnees

Language Learning, Volume 76, Issue 2, Page 391-424, June 2026.
Abstract How flexible are grammars after puberty? To answer this, we test returnees: heritage speakers (HS) born in an immigration context who returned to their homeland in later years. If returnees are targetlike, then language is still malleable after puberty; in contrast, if maturational effects are in play, postpuberty returnees will show ...
Aylin Coşkun Kunduz, Silvina Montrul
wiley   +1 more source

Two-Dimensional AOA Estimation Based on a Constant Modulus Algorithm

International Journal of Antennas and Propagation, 2017
We propose a two-dimensional (2D) angle of arrival (AOA) estimator using the algebraic constant modulus algorithm (ACMA). This algorithm was originally introduced to estimate the one-dimensional (1D) AOA.
Saleh O. Al-Jazzar, Zoubir Hamici, Sami Aldalahmeh   +2 more
doaj   +1 more source

Aerodynamic Characteristics of Airfoils Equipped With Gurney Flaps and Vortex Generators for the Entire Range of Pitch Angles

Wind Energy, Volume 29, Issue 5, May 2026.
ABSTRACT An experimental study of NACA0021 airfoil equipped with vortex generators (VGs) and Gurney flaps (GFs) was conducted to assess the effects of these devices on the aerodynamic airfoil performance, the information that is necessary for studying the self‐starting characteristics of vertical axis wind turbines (VAWTs).
Marin Ivanković, Marvin Jentzsch, Marinos Manolesos, Christian Navid Nayeri, Hrvoje Kozmar   +4 more
wiley   +1 more source

Inferring Helmet Compliance on E-Scooters Using Bluetooth and Angle-of-Arrival (AoA) Technology

IEEE Transactions on Instrumentation and Measurement
The use of e-scooters and the associated head injuries have increased significantly in recent years. To protect the head and face of the riders, helmets are essential equipment, sometimes mandatory according to the regulations, which makes them an important research target. In this article, we propose a practical helmet monitoring system for e-scooters
Juan-Antonio Fernández-Madrigal, Jesús Manuel Gómez de Gabriel, María del Carmen Rey-Merchán, Antonio López Arquillos   +3 more
openaire   +3 more sources

Secret Key Generation Based on AoA Estimation for Low SNR Conditions

, 2014
In the context of physical layer security, a physical layer characteristic is used as a common source of randomness to generate the secret key. Therefore an accurate estimation of this characteristic is the core for reliable secret key generation ...
Badawy, Ahmed, Chiasserini, Carla-Fabiana, Elfouly, Tarek, Khattab, Tamer, Mohamed, Amr, Trinchero, Daniele   +5 more
core   +1 more source

An indoor localization technique based on ultra-wideband AoD/AoA/ToA estimation [PDF]

, 2016
P
Gaillot, Davy P., Hanssens, Brecht, Joseph, Wout, Liénard, Martine, Martens, Luc, Oestges, Claude, Plets, David, Tanghe, Emmeric   +7 more
core   +4 more sources

Ryugu reference project: Recommendations from the measurement definition team

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 819-848, May 2026.
Abstract Sample return missions play a significant role in planetary science by providing pristine extraterrestrial materials. JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions have returned samples from the C‐type asteroids Ryugu and Bennu, respectively. The chemical and mineralogical compositions of these samples closely resemble those of CI chondrites,
Tetsuya Yokoyama, Guillaume Avice, Henner Busemann, Nicolas Dauphas, Daniel P. Glavin, Ashley J. King, Thorsten Kleine, Katharina Lodders, Frederic Moynier, Maria Schönbächler, Yoshinori Takano, Kun Wang, Hikaru Yabuta, Yuma Enokido, Ryota Fukai, Shogo Tachibana, Tomohiro Usui   +16 more
wiley   +1 more source

Optical angle‐of‐arrival (AoA) sensor for the motion analysis of knee joints

Electronics Letters, 2017
The most widely used clinical technique for estimating bone movements in knee joints with acceptable accuracy utilises implantation of heavy metallic beads into the bones. These small metallic objects become visible as highly contrasting features in captured radiographs, thus facilitating post kinematic assessment of bones in human joints with pinpoint
openaire   +1 more source