Results 41 to 50 of about 12,179 (194)

Time-Difference-of-Arrival-Based Localization Methods of Underwater Mobile Nodes Using Multiple Surface Beacons

IEEE Access, 2021
In this paper, we investigate the mobile node localization problem in an underwater positioning system using multiple surface beacons, where time synchronization between the surface beacons and underwater mobile nodes is not required. First, we propose a
Feng Liu, Huifang Chen, Luyixin Zhang, Lei Xie   +3 more
doaj   +1 more source

Weighted Least Squares Algorithm for Single-observer Passive Coherent Location Using DOA and TDOA Measurements

Leida xuebao, 2016
In order to determine single-observer passive coherent locations using illuminators of opportunity, we propose a jointing angle and Time Difference Of Arrival (TDOA) Weighted Least Squares (WLS) location method.
Zhao Yongsheng, Zhao Yongjun, Zhao Chuang   +2 more
doaj   +1 more source

Geolocation with FDOA Measurements via Polynomial Systems and RANSAC

, 2017
The problem of geolocation of a transmitter via time difference of arrival (TDOA) and frequency difference of arrival (FDOA) is given as a system of polynomial equations.
Bates, Daniel J., Cameron, Karleigh J.
core   +1 more source

Location-free Spectrum Cartography [PDF]

, 2019
Spectrum cartography constructs maps of metrics such as channel gain or received signal power across a geographic area of interest using spatially distributed sensor measurements.
Beferull-Lozano, Baltasar, Ramos, Luis Miguel Lopez, Romero, Daniel, Teganya, Yves   +3 more
core   +2 more sources

Research of underground positioning algorithm based on DOA and TDOA

Gong-kuang zidonghua, 2013
In view of problems that current underground positioning system is sensitive to environmental change and has low positioning accuracy, the paper introduced an underground positioning algorithm based on DOA and TDOA. The algorithm takes advantages of high
ZHAI Yan-rong, HUANG Huan, ZHANG Shen, MA Xiu-ping, LIU Wei, YOU Chun-xia   +5 more
doaj   +1 more source

Multi-Array 5G V2V Relative Positioning: Performance Bounds

, 2019
We study the performance bounds of vehicle-to-vehicle (V2V) relative positioning for vehicles with multiple antenna arrays. The Cram\'{e}r-Rao bound for the estimation of the relative position and the orientation of the Tx vehicle is derived, when angle ...
García, Mario H. Castañeda, Kakkavas, Anastasios, Nossek, Josef A., Stirling-Gallacher, Richard A.   +3 more
core   +1 more source

Quantification of the performance of iterative and non-iterative computational methods of locating partial discharges using RF measurement techniques [PDF]

, 2017
Partial discharge (PD) is an electrical discharge phenomenon that occurs when the insulation materialof high voltage equipment is subjected to high electric field stress. Its occurrence can be an indication ofincipient failure within power equipment such
Alistair J. Reid, Bancroft, Brian G. Stewart, Bucher, Chiu, Coenen, El Mountassir, El Mountassir, Hikita, Ho, Hu, Judd, Lu, Mardiana, Markalous, Meijer, Miao, Moore, Othmane El Mountassir, Scott G. McMeekin, Sinaga, Steiner, Stewart, Tang, Tian, Tian, Wagenaars, Yang, Zhang, Zheng   +29 more
core   +1 more source

Distributed localization of a RF target in NLOS environments

, 2014
We propose a novel distributed expectation maximization (EM) method for non-cooperative RF device localization using a wireless sensor network. We consider the scenario where few or no sensors receive line-of-sight signals from the target. In the case of
Leng, Mei, Quitin, Francois, Razul, Sirajudeen G., Tay, Wee Peng, Xu, Wenjie   +4 more
core   +1 more source

Speaker Diarization Based on Intensity Channel Contribution [PDF]

, 2011
The time delay of arrival (TDOA) between multiple microphones has been used since 2006 as a source of information (localization) to complement the spectral features for speaker diarization.
Barra Chicote, Roberto, Ferreiros López, Javier, Montero Martínez, Juan Manuel, Pardo Muñoz, José Manuel   +3 more
core   +3 more sources

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source