Results 11 to 20 of about 158,434 (296)

Spectral and temporal gating mechanisms enhance the clutter rejection in the echolocating bat, Rhinolophus rouxi [PDF]

, 1991
Doppler shift compensation behaviour in horseshoe bats, Rhinolophus rouxi, was used to test the interference of pure tones and narrow band noise with compensation performance.
Neumann, Ingrid, Schuller, Gerd
core   +1 more source

Doppler-Induced Dynamics of Fields in Fabry-Perot Cavities with Suspended Mirrors [PDF]

, 2001
The Doppler effect in Fabry-Perot cavities with suspended mirrors is analyzed. Intrinsically small, the Doppler shift accumulates in the cavity and becomes comparable to or greater than the line-width of the cavity if its finesse is high or its length is
Abramovici, An, Camp, Drever, Lawrence, Rakhmanov, Robertson   +6 more
core   +3 more sources

Burst Format Design for Optimum Joint Estimation of Doppler-Shift and Doppler-Rate in Packet Satellite Communications

EURASIP Journal on Wireless Communications and Networking, 2007
This paper considers the problem of optimizing the burst format of packet transmission to perform enhanced-accuracy estimation of Doppler-shift and Doppler-rate of the carrier of the received signal, due to relative motion between the transmitter and the
Luca Giugno, Francesca Zanier, Marco Luise   +2 more
doaj   +2 more sources

Precise Angle Estimation by Jointly Using Spatial/Temporal Change of Channel State Information and Its Application in Pedestrian Positioning

IEEE Access, 2021
Previously, we have proposed a pedestrian positioning method that uses vehicles near a pedestrian as anchors, and combines vehicle-to-vehicle (V2V) communication signals and GPS signals for high precision positioning.
Wataru Komamiya, Suhua Tang, Sadao Obana
doaj   +1 more source

The quiet Sun average Doppler shift of coronal lines up to 2 MK [PDF]

, 2011
The average Doppler shift shown by spectral lines formed from the chromosphere to the corona reveals important information on the mass and energy balance of the solar atmosphere, providing an important observational constraint to any models of the solar ...
Achour, Athay, Athay, Ayres, Brekke, Brekke, Chae, Cheng, Culhane, Dammasch, Danilovic, De Pontieu, De Pontieu, Delaboudinière, Domínguez Cerdeña, Doschek, Edlén, Hansteen, Hansteen, Hansteen, Hara, Hassler, Judge, Korendyke, L. Teriaca, Laming, Lemaire, Mariska, Marsch, McIntosh, McIntosh, N. Dadashi, Pagano, Peter, Peter, Peter, Peter, Peter, Pneuman, S. K. Solanki, Samain, Spadaro, Teriaca, Teriaca, Teriaca, Tian, Trujillo Bueno, Tu, Wilhelm, Withbroe, Wood   +50 more
core   +1 more source

Mobile ultrasonic transducer positioning

The Journal of Engineering, 2017
For positioning a moving ultrasonic transmitter, most of the existing ultrasonic positioning systems require the use of a bank of correlators to estimate the Doppler shift associated with its movement which require high computational complexity.
Mohammad Omar Khyam, Shuzhi Sam Ge, Li Xinde, Mark Pickering   +3 more
doaj   +1 more source

Sharing a common origin between the rotational and linear doppler effects [PDF]

, 2017
The well-known linear Doppler effect arises from the linear motion between source and observer, while the less well-known rotational Doppler effect arises from the rotational motion.
Allen, Allen, Asakura, Barker, Barreiro, Beijersbergen, Belmonte, Belmonte, Bialynicki-Birula, Bozinovic, Chen, Courtial, Courtial, Durst, Forbes, Franke-Arnold, Garetz, Garetz, Lambourne, Lavery, Lavery, Li, Marrucci, Marrucci, Meynart, Padgett, Padgett, Poynting, Rosales-Guzmán, Rosales-Guzmán, Ryabtsev, Soskin, Wang, Wang, Wang, Wang, Wang, Willner, Willner, Yao, Yu   +40 more
core   +1 more source

Doppler shift extraction of wideband signal using spectrum scaling matching

MATEC Web of Conferences, 2018
Doppler shift is an important feature of moving targets. It can be used to extract target velocity, distance, track and other movement parameters. According to the problem of extracting Doppler shift for wideband signals with unstable line spectrum or no
Fengzhen Zhang, Guijuan Li, Zhaohui Zhang, Chen Hu   +3 more
doaj   +1 more source

Modeling and analysis for dynamical Doppler shifts on terahertz communication signals propagating in inhomogeneous hypersonic plasma sheath [PDF]

AIP Advances
Previous studies have shown that terahertz (THz) signals could penetrate hypersonic plasma sheaths. Thus, it is considered to be a potential solution to the “blackout” problem.
Xiangmeng Lin, Junyi Zhang, Kai Yuan, Ziyang Zhao, Rongxin Tang   +4 more
doaj   +1 more source

Storage of Doppler-Shift Information in the Echolocation System of the "CF-FM"-Bat, Rhinolophus ferrumequinum [PDF]

, 1976
The greater horseshoe bat (Rhinolophus ferrumequinum) emits echolocation sounds consisting of a long constant-frequency (CF) component preceeded and followed by a short frequency-modulated (FM) component. When an echo returns with an upward Doppler-shift,
Schuller, Gerd, Suga, Nobuo
core   +1 more source