Results 21 to 30 of about 709 (147)

Distributed Passive Tracking of a Non-Cooperative Underwater Target Utilizing Temporal Correlation of Line Spectrum

Journal of Marine Science and Engineering
Distributed passive acoustic tracking is an important technique for detecting and localizing a non-cooperative underwater target, in which the frequency difference of arrival (FDOA) is a widely used measurement.
Shutong Zong, Wei Gao, Xiaolei Li
doaj   +2 more sources

Moving target positioning algorithm based on multidimensional scaling analysis from TDOA and FDOA with sensor uncertainties

Cogent Engineering
The problem of moving target localization from range and velocity difference measurements has attracted considerable attention in recent years. In this article, a novel weighted multidimensional scaling (MDS) algorithm is proposed to estimate the ...
Hesham Ibrahim Ahmed
doaj   +2 more sources

Closed-Form Method for Unified Far-Field and Near-Field Localization Based on TDOA and FDOA Measurements

Remote Sensing
When the near-field and far-field information of a target is uncertain, it is necessary to choose a suitable localization method. The modified polar representation (MPR) method integrates the two scenarios and achieves a unified localization with ...
Yachao Li, Xuan Song
exaly   +3 more sources

FDOA determination of ADS-B transponder signals

, 2022
S.84-87In this paper, we investigate a Frequency Difference of Arrival (FDOA) based localization scenario with a stationary sensor network and one moving emitter.
Steffes, C., Rau, S.
core   +1 more source

TDOA positioning accuracy analysis based on time difference direction‐finding in distributed high‐frequency surface wave radar

IET Radar, Sonar &Navigation, Volume 17, Issue 10, Page 1498-1506, October 2023., 2023
Based on the time difference direction‐finding algorithm, new mathematical expressions of geometric dilution of precision (GDOP) are presented in Time Difference of Arrival positioning systems in this paper. The time difference direction‐finding reveals that the angle measurements are accurate for any length of baseline.
Yang Bai, Xin Zhang, Weibo Deng, Mengxiao Zhao   +3 more
wiley   +1 more source

Irregularities Observed at the Edge of a Mid‐Latitude Ionospheric Depletion Following a Geomagnetic Storm

Space Weather, Volume 21, Issue 6, June 2023., 2023
Abstract This manuscript presents the analysis of data from multiple ground‐ and space‐based sensors in the North American region before, during, and after the 12 October 2021 geomagnetic storm. Total electron content (TEC) and electron density data show the formation and equatorward propagation of a mid‐latitude trough at ∼50°N followed by the ...
J. F. Helmboldt
wiley   +1 more source

Time‐difference‐of‐arrival and frequency‐difference‐of‐arrival estimation for signals with partially known waveform

IET Signal Processing, Volume 17, Issue 2, February 2023., 2023
The prior information carried by the known waveform of the reference signal to reduce the negative impact of random noise is exploited, and a coherent and an incoherent method is proposed to estimate the TDOA and FDOA parameters between two moving receivers.
Yan Liu, Yi Zhu, Yuan Zhang, Fucheng Guo
wiley   +1 more source

On optimality of multidimensional scaling for time differences of arrival/frequency differences of arrival based moving source localisation

IET Signal Processing, Volume 16, Issue 8, Page 1002-1010, October 2022., 2022
Abstract Multidimensional scaling (MDS) is an attractive technique for a moving source localisation from time and frequency difference of arrival (time differences of arrival (TDOA)/frequency differences of arrival (FDOA)) measurements. However, its optimality has not yet been proven theoretically because of the difficult Moore–Penrose pesudo‐inverse ...
He‐Wen Wei, Fei Wen, Jian Cheng
wiley   +1 more source

Improved position estimation method for locating an encrypted COSPAS‐SARSAT beacon

IET Radar, Sonar & Navigation, 2021
This study addresses a signal processing technique in a search and rescue system. An international disaster rescue communications support programme such as COSPAS‐ search and rescue satellite‐aided tracking (SARSAT) estimates the position of a beacon ...
Jung‐Hoon Lee, Young‐Jin Song, In‐Cheol Jeong, Jong‐Hoon Won   +3 more
doaj   +1 more source

Optimal Sensor Deployment and Velocity Configuration With Hybrid TDOA and FDOA Measurements

IEEE Access, 2019
Source localization based on the hybrid time-difference-of-arrival (TDOA) and frequency-difference-of-arrival (FDOA) measurements from distributed sensors is an essential problem in wireless sensor networks (WSNs).
Weijia Wang, Peng Bai, Yubing Wang, Xiaolong Liang, Jiaqiang Zhang   +4 more
doaj   +1 more source