Results 61 to 70 of about 507,465 (200)

Performance Analysis of BLE-5.1 Angle of Arrival Estimation Using Embedded Radiation Patterns on a 3 × 3 Uniform Rectangular Array

IEEE Access
The introduction of new Direction finding (DF) features in Bluetooth Low Energy (BLE) 5.1, has brought about new hardware design requirements for locators.
Ottavio Crisafulli, Nicolo Ivan Piazzese, Santi Concetto Pavone, Giuseppe Giammello, Giovanni Galvagna, Salvatore Pitrulli, Andrea Francesco Morabito, Loreto Di Donato, Michele Sardo, Gino Sorbello   +9 more
doaj   +1 more source

Best Practices on High Frequency Radar Deployment and Operation for Ocean Current Measurement

Frontiers in Marine Science, 2020
High Frequency Radar (HFR) technology refers to land based remote sensing instruments capable of measuring surface currents and ocean waves at ranges up to 200 km or more.
Carlo Mantovani, Lorenzo Corgnati, Jochen Horstmann, Anna Rubio, Emma Reyes, Céline Quentin, Simone Cosoli, Jose Luis Asensio, Julien Mader, Annalisa Griffa   +9 more
doaj   +1 more source

The Effect of Item Modality and Note-taking on EFL Learners’ Performance on a Listening Test [PDF]

Issues in Language Teaching, 2015
The pivotal role of listening comprehension in second/foreign language learning requires that researchers conduct studies which investigate factors that affect test takers’ performances. The present study was set out to examine whether item modality (i.e.
Karim Sadeghi, Maryam Zeinali
doaj   +1 more source

Direction-of-arrival estimation performance analysis of the rank reduction estimator in the presence of finite samples

Tongxin xuebao, 2013
The DOA estimation performance of the rank reduction estimator(RARE) in the case of finite samples was studied. Based on the perturbation theorem associated with the orthogonal projection matrix of the signal (or noise) sub-space, the first-order and ...
Ding WANG, Hui YAO, Ying WU
doaj   +2 more sources

Intelligence/Electronic Warfare (IEW) direction-finding and fix estimation analysis report. Volume 2: Trailblazer [PDF]

An analysis of the direction finding (DF) and fix estimation algorithms in TRAILBLAZER is presented. The TRAILBLAZER software analyzed is old and not currently used in the field. However, the algorithms analyzed are used in other current IEW systems. The
Gardner, Robert, Gillis, James W., Griesel, Ann, Pardo, Bruce   +3 more
core   +1 more source

Systematic Errors and Location Accuracy in Wireless Networks

EURASIP Journal on Advances in Signal Processing, 2006
Wireless systems already provide time delay and signal strength measurements and the future may see antenna arrays that provide directional information. All these may be used for positioning.
Saarnisaari Harri, Bräysy Timo
doaj   +1 more source

Topological phase in $1D$ topological Kondo insulator: $Z_{2}$ topological insulator, Haldane-like phase and Kondo breakdown

, 2017
We have simulated a half-filled $1D$ $p$-wave periodic Anderson model with numerically exact projector quantum Monte Carlo technique, and the system is indeed located in the Haldane-like state as detected in previous works on the $p$-wave Kondo lattice ...
Liu, Yu, Luo, Hong-Gang, Zhong, Yin
core   +1 more source

Cutting a Convex Polyhedron Out of a Sphere

, 2010
Given a convex polyhedron $P$ of $n$ vertices inside a sphere $Q$, we give an $O(n^3)$-time algorithm that cuts $P$ out of $Q$ by using guillotine cuts and has cutting cost $O((\log n)^2)$ times the optimal.Comment: 10 ...
Ahmed, Syed Ishtiaque, Hasan, Masud, Islam, Md. Ariful   +2 more
core   +1 more source

Sparse DOA Estimation Based on Multi-Level Prime Array With Compression

IEEE Access, 2019
A signal emitter can be located using diverse types of direction finding (DF) techniques. One of the most widely used techniques is the direction of arrival (DOA) estimation using antenna arrays.
Saleh A. Alawsh, Ali H. Muqaibel
doaj   +1 more source

A multilinear direction finding (DF) approach for a sensor-array with multiple scales of invariance

, 2013
In this paper, we introduce a novel direction finding algorithm for a multi-scale sensor-array, that is, an array presenting multiple scales of invariance. We show that the collected data can be represented as a Candecomp/Parafac (CP) model, for which we analyze the identifiability properties.
Miron, Sebastian, Song, Yang, Brie, David, Wong, Kainam   +3 more
openaire   +1 more source