Results 11 to 20 of about 414,744 (286)
IET Signal Processing, 2023 Abstract In many passive localization applications, the reference waveform of the received electromagnetic signals is partly known. The received signals in such scenarios are formulated by modelling the relationship between the received data and the known reference signal waveform and the parameters of interest, such as time ...
Yan Liu, Yi Zhu, Yuan Zhang, Fucheng Guo
openaire +1 more source
Orthogonal frequency division multiplexing‐based time difference of arrival estimation [PDF]
IET Communications, 2019 This study presents a spectral approach to estimate the time difference of arrival (TDOA) between a reference unit, composed of a pair of very close antennas (small baseline regarding the operating bandwidth), acting as a known fixed location transmitter, and a mobile unit acting as a single antenna receiver. It uses the channel frequency response (CFR)
Abudabbousa, Ahmed +2 more
openaire +3 more sources
TDOA –FDOA method for tracking of a moving target in a distributed sensor scenario [PDF]
ITM Web of Conferences, 2023 Tracking of an underwater target in ocean environment is very important in both military and civilian applications. This paper focuses on the localization and tracking of a moving target by a passive multi-static sonar system using TOA, Time Difference ...
George Sherly, Muralikrishna P.
doaj +1 more source
IET Signal Processing, 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.
He‐Wen Wei, Fei Wen, Jian Cheng
openaire +1 more source
International Journal of Antennas and Propagation, 2021 The low-orbit dual-satellite passive location system provides a cost-efficient and easy implementation platform, by which positions of unknown emitters on the Earth can be determined through measuring both the time and the frequency differences by two ...
Gang Li +3 more
doaj +1 more source
Sensors, 2018 Current bias compensation methods for distributed localization consider the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements noise, but ignore the negative influence by the sensor location uncertainties on source ...
Zhixin Liu, Rui Wang, Yongjun Zhao
doaj +1 more source
Indoor environment propagation review [PDF]
, 2020 A survey of indoor propagation characteristics is presented, including different models for path loss, shadowing and fast fading mechanisms, different channel parameters including signal strength, power delay, coherence bandwidth, Doppler spread and ...
Abd-Alhameed, R. +11 more
core +1 more source
A Multi-Pulse Cross Ambiguity Function for the Wideband TDOA and FDOA to Locate an Emitter Passively
Remote Sensing, 2022 The time difference of arrival (TDOA) and frequency difference of arrival (FDOA) between two receivers are widely used to locate an emitter. Algorithms based on cross ambiguity functions can simultaneously estimate the TDOA and FDOA accurately.
Yuqi Wang +5 more
doaj +1 more source
Highly efficient impulse-radio ultra-wideband cavity-backed slot antenna in stacked air-filled substrate integrated waveguide technology [PDF]
, 2018 An impulse-radio ultra-wideband (IR-UWB) cavity-backed slot antenna covering the [5.9803; 6.9989] GHz frequency band of the IEEE 802.15.4a-2011 standard is designed and implemented in an air-filled substrate integrated waveguide (AFSIW) technology for ...
Lemey, Sam +3 more
core +1 more source
Time of arrival difference estimation for narrow band high frequency echolocation clicks [PDF]
The Journal of the Acoustical Society of America, 2019 Algorithms are presented for the accurate time of arrival difference estimation of high frequency narrow band echolocation clicks from Harbor Porpoise. These clicks typically have a center frequency of around 130 kHz (wavelength ∼1.2 cm) and duration of <0.1 ms.
Gillespie, Douglas, Macaulay, Jamie
openaire +4 more sources