Results 31 to 40 of about 4,770 (178)

Underground personnel positioning system based on ultra wideband technology

Gong-kuang zidonghua, 2014
In view of problems of short transmission distance, poor anti-multipath effect and low positioning accuracy existed in current underground personnel positioning technologies, an underground personnel positioning system was proposed by use of ultra ...
LIU Shulun, WANG Shuse
doaj   +1 more source

A New Hybrid Algorithm to Image Lightning Channels Combining the Time Difference of Arrival Technique and Electromagnetic Time Reversal Technique

Remote Sensing, 2021
Very-high-frequency (VHF) electromagnetic signals have been well used to image lightning channels with high temporal and spatial resolution due to their capability to penetrate clouds.
Fengquan Li, Zhuling Sun, Mingyuan Liu, Shanfeng Yuan, Lei Wei, Chunfa Sun, Huimin Lyu, Kexin Zhu, Guoying Tang   +8 more
doaj   +1 more source

The Complete Analytical Solution of the TDOA Localization Method

, 2022
This article is focused on the analytical solution of a TDOA (Time Difference of Arrival) localization method, including analysis of accuracy and unambiguity of a target position estimation in 2D space.
Veselý, Jiří, Hubáček, Petr, Olivová, Jana   +2 more
core   +1 more source

A Model on Indoor Localization System Based on the Time Difference Without Synchronization

IEEE Access, 2018
Localization has emerged as an attractive solution to enable new business models that rely on location-based services in wireless networks for communication, sensing, and control. In particular, time difference-of-arrival (TDOA) is one of the widely used
Yuan Xue, Wei Su, Hongchao Wang, Dong Yang, Jian Ma   +4 more
doaj   +1 more source

Approximate Analytic Quadratic-Optimization Solution for TDOA-Based Passive Multi-Satellite Localization With Earth Constraint

IEEE Access, 2016
In this paper, we make an investigation of the problem of passive multi-satellite localization based on time differences of arrival (TDOA) with Earth constraint (EC).
Feng Shu, Shuping Yang, Yaolu Qin, Jun Li   +3 more
doaj   +1 more source

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

TDOA-based localization model with four sensors

, 2023
LAUREA MAGISTRALEIn questo lavoro sviluppiamo un modello deterministico per la localizzazione di una sorgente, che emette un segnale che si propaga uniformemente in un piano, tramite dei sensori.
CASTELLI, ALBERTO
core  

Schematic diagram of TDOA positioning system.

, 2022
Schematic diagram of TDOA positioning system.
Liang Dong (381161), Sheng Miao (14248110), Jingyu Hou (6015302)   +2 more
core   +1 more source

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