Results 41 to 50 of about 12,674 (202)

Enhanced hybrid positioning in wireless networks I: AoA-ToA [PDF]

open access: yes, 2014
Localization in wireless networks presents enormous challenges for scientists and engineers. Some of the most commonly used techniques for localization are based on time of arrival (ToA), received signal strength (RSS) and angle of arrival (AoA) of the ...
Kemp, AH, Khan, MW, Salman, N
core   +1 more source

MIMO channel estimation with arbitrary angle of arrival incident power spectrum for wireless communications

open access: yesIET Communications, 2021
This study proposes an approximate algorithm for the arbitrary angle of arrival (AoA) incident power spectrum in wireless environments. The approach expands approximate algorithms for small angles to the large‐angle AoA PDF.
Jie Zhou   +4 more
doaj   +1 more source

Low complexity and high accuracy angle of arrival estimation using eigenvalue decomposition with extension to 2D AOA and power estimation [PDF]

open access: yesEURASIP Journal on Wireless Communications and Networking, 2011
In this paper, an angle of arrival (AOA) estimator is presented. Accurate AOA estimation is very crucial for many applications such as wireless positioning and signal enhancement using space processing techniques. The proposed estimator is based upon applying the eigenvalue decomposition (EVD) method on the crosscorrelation matrix of the received ...
Al-Jazzar, Saleh O   +3 more
openaire   +1 more source

Electroactive Biodegradable Nerve Conduits Based on Alginate–Gelatine Polymer Matrix Modified With Inorganic Nanoparticles

open access: yesNatural Sciences, Volume 6, Issue 2, April 2026.
The effects of ZnO, fullerene C60 and polyaniline (PANI) nanoparticles in hybrid nerve conduits are explored. The composites show enhanced electrical conductivity, permeability to physiological fluids and mechanical stability. The biocompatibility of composites is confirmed by in vivo and in vitro studies.
Liudmyla Sukhodub   +7 more
wiley   +1 more source

A Review of Linear Multilateration Techniques and Applications

open access: yesIEEE Access
In multilateration, distances between an unknown location and several known points are used to determine the location of the unknown point. Papers on algorithms for multilateration, such as time of arrival (TOA), time difference of arrival (TDOA), and ...
Eric Widdison, David G. Long
doaj   +1 more source

An Empirical Model of Angle-of-Arrival Variance for a Gaussian Wave Propagation through Non-Kolmogorov Turbulence

open access: yesInternational Journal of Optics, 2020
This paper proposes an empirical model of the angle-of-arrival (AOA) variance for a Gaussian wave propagating through the weak non-Kolmogorov turbulence.
Chao Gao, Libin Jiao, Xiaofeng Li
doaj   +1 more source

NON LINEAR OPTIMIZATION APPLIED TO ANGLE-OF-ARRIVAL SATELLITE BASED GEO-LOCALIZATION FOR BIASED AND TIME-DRIFTING SENSORS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Multiple sensors are used in a variety of geolocation systems. Many use Time Difference of Arrival (TDOA) or Received Signal Strength (RSS) measurements to estimate the most likely location of a signal.
D. Levy   +7 more
doaj   +1 more source

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

open access: yesIEEE 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

Mixing and combining with AOA and TOA for the enhanced accuracy of mobile location [PDF]

open access: yes
[[abstract]]Position location has become a hot issue over the past few years in wireless communication. Providing the accurate location information of the mobile station (MS) is necessitated by the Emergent 911 call in United States. The angle of arrival
Chen, Tsung-Yu
core   +1 more source

Conjoined Parasitic Twins (Cephalo‐Thoracopagus Parasiticus) in a Free Ranging Northern Bat (Eptesicus nilssonii): A Micro‐CT Anatomic and Genetic Survey

open access: yesAnatomia, Histologia, Embryologia, Volume 55, Issue 2, March 2026.
ABSTRACT The detailed anatomical situation of male stillborn cephalo‐thoracopagus twins in a wild ranging northern bat (Eptesicus nilssonii) is described by means of full body micro‐CT scans in high resolution with three‐dimensional computational reconstruction.
J. Meyer   +5 more
wiley   +1 more source

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