Results 21 to 30 of about 14,116,486 (379)
Rotational Doppler Effect With Vortex Beams: Fundamental Mechanism and Technical Progress
Frontiers of Physics, 2022 Structured light beams such as optical vortices can carry the orbital angular momentum (OAM) with an unbounded quantum number. Recent years have witnessed a growing interest in the rotational Doppler effect with vortex light.
Song Qiu +5 more
semanticscholar +1 more source
Channel Estimation for Reconfigurable Intelligent Surface-Assisted Wireless Communications Considering Doppler Effect [PDF]
IEEE Wireless Communications Letters, 2020 In wireless systems aided by reconfigurable intelligent surfaces (RISs), channel state information plays a pivotal role in achieving the performance gain of RISs.
Shu Sun, Hangsong Yan
semanticscholar +1 more source
On the Doppler Squint Effect in OTFS Systems Over Doubly-Dispersive Channels: Modeling and Evaluation [PDF]
IEEE Transactions on Wireless Communications, 2023 Extensive work has demonstrated the excellent performance of orthogonal time frequency space (OTFS) modulation in high-mobility scenarios. Time-variant wideband channel estimation serves as one of the key compositions of OTFS receivers since the data ...
Xuehan Wang +3 more
semanticscholar +1 more source
Photonics, 2022 The linear Doppler effect has been widely used to detect the translational motion of objects. However, it suffers difficulties in measuring the angular motion of a rotating target. In recent years, the rotational Doppler effect based on a vortex beam has
Tian-Yu Cheng +5 more
semanticscholar +1 more source
Wireless Communications and Mobile Computing, 2022 The multipath fading and Doppler effect are well-known phenomena affecting channel quality in mobile wireless communication systems. Within this context, the emergence of reconfigurable intelligence surfaces (RISs) brings a chance to achieve this goal ...
Guilu Wu, Fan Li, Huilin Jiang
semanticscholar +1 more source
Science & Philosophy, 2023 Christian Doppler, an Austrian physicist, described in 1842 the apparent change in frequency of a wave when motion of the source or the observer is involved. Named after him, this change in observational frequencies is known as the Doppler Effect.
Denis Thomas
doaj +1 more source
Resonant Doppler effect in systems with variable delay. [PDF]
Philos Trans A Math Phys Eng Sci, 2019 We demonstrate that a time-varying delay in nonlinear systems leads to a rich variety of dynamical behaviour, which cannot be observed in systems with constant delay.
Müller-Bender D, Otto A, Radons G.
europepmc +2 more sources
IEEE Communications Letters, 2021 The filterbank multicarrier (FBMC) waveform has better properties in spectral as compared to the Orthogonal Frequency Division Multiplexing (OFDM) and it exhibits good anti-interference performance.
Gang Qiao +4 more
semanticscholar +1 more source
The Evaluation of Light Conditions Influence and Corrections upon Doppler Blood Perfusion Imagining
Advances in Electrical and Electronic Engineering, 2016 The paper deals with theoretical and experimental research of the ambient light influence upon the measuring reliability of the perfusion maps by the laser Doppler method using the device PeriScan PIM 3.
Jan Kubicek +4 more
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ENERGY LOSS OF CHARGED PARTICLE ON THE WAVES EXCITATION IN SEMICONDUCTOR CYLINDER WITH TWO-DIMENSIONAL ELECTRON GAS ON THE SIDE SURFACE [PDF]
Радиофизика и электроника, 2015 One of the urgent problems of modern radiophysics is the study of the fundamental properties of solid-state structures that contain nanodimension fragments.
A .V. Dormidontov +2 more
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