Results 31 to 40 of about 1,168,111 (299)

A Novel Joint TDOA/FDOA Passive Localization Scheme Using Interval Intersection Algorithm

open access: yesInformation, 2021
Due to the large measurement error in the practical non-cooperative scene, the passive localization algorithms based on traditional numerical calculation using time difference of arrival (TDOA) and frequency difference of arrival (FDOA) often have no ...
Lingyu Ai   +5 more
doaj   +1 more source

Estimating animal population density using passive acoustics [PDF]

open access: yes, 2013
Reliable estimation of the size or density of wild animal populations is very important for effective wildlife management, conservation and ecology. Currently, the most widely used methods for obtaining such estimates involve either sighting animals from
Ward, Jessica   +20 more
core   +1 more source

Ant Colony Pheromone Mechanism-Based Passive Localization Using UAV Swarm

open access: yesRemote Sensing, 2022
The problem of passive localization using an unmanned aerial vehicle (UAV) swarm is studied. For multi-UAV localization systems with limited communication and observation range, the challenge is how to obtain accurate target state consistency estimates ...
Yongkun Zhou   +5 more
doaj   +1 more source

Passive Localization Algorithm for Radiation Source Based on Long Synthetic Aperture

open access: yesLeida xuebao, 2020
When the direction-of-arrival estimation is made by a single platform, the localization accuracy decreases with increases in the distance from the radiation source, which means the localization accuracy of the azimuth of the radiation source at long ...
WANG Yuqi   +5 more
doaj   +1 more source

Rheology of passive and adhesion-activated neutrophils probed by Atomic Force Microscopy [PDF]

open access: yes, 2006
The rheology of neutrophils in their passive and activated states plays a key role in determining their function in response to inflammatory stimuli. Atomic force microscopy was used to study neutrophil rheology by measuring the complex shear modulus G ...
Farré, Ramon   +10 more
core   +1 more source

A Multi-Static Radar Network with Ultra-Wideband Radio-Equipped Devices

open access: yesSensors, 2020
A growing number of devices, from car key fobs to mobile phones to WiFi-routers, are equipped with ultra-wideband radios. In the network formed by these devices, communicating modules often estimate the channel impulse response to employ a matched filter
Anton Ledergerber, Raffaello D’Andrea
doaj   +1 more source

Anchor Nodes Placement for Effective Passive Localization [PDF]

open access: yes, 2011
This paper discusses anchor nodes placement for effective passive localization. The authors show that, for effective passive localization, the optimal placement of the anchor nodes is at the center of the network in such a way that no three anchor nodes ...
Robert Akl   +5 more
core   +1 more source

Passive Source Localization Using Compressive Sensing

open access: yesSensors, 2019
This paper presents an underwater passive source localization method by forming an underdetermined linear inversion problem. The signal strength on a specified grid is evaluated using sparse reconstruction algorithms by exploiting the spatial sparsity of
Hangfang Zhao   +3 more
doaj   +1 more source

Direct Position Determination: An Overview

open access: yesLeida xuebao, 2020
Passive localization technology, which intercepts emitter signals and passively determines their positions, has important value in fields such as electronic reconnaissance and search and rescue. The traditional passive localization technology approach, i.
Guizhou WU, Fucheng GUO, Min ZHANG
doaj   +1 more source

A Passive Localization Scheme Based on Channel State Information in an Indoor Environment

open access: yes, 2017
Localization is an important issue and has been applied in many applications. Many localization mechanisms have been developed in the last decade, including GPS-based, Wi-Fi RSSI Signal based as well as BLE Beacon based localizations.
Yu, Hong-Li;Chen, Gui-Lin;Zhao, Sheng-Hui;Chang, Chih-Yung
core   +1 more source

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