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1991
The Doppler effect, named for Christian Doppler (ca. 1842), has tremendous importance for science and technology. Thanks to it, air traffic controllers can distinguish among objects moving in the line of sight; on the ground, speeding cars can be identified before serious accidents occur; and in space, the velocities of the stars and the rotations and ...
Th. Schmidt-Kaler +2 more
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The Doppler effect, named for Christian Doppler (ca. 1842), has tremendous importance for science and technology. Thanks to it, air traffic controllers can distinguish among objects moving in the line of sight; on the ground, speeding cars can be identified before serious accidents occur; and in space, the velocities of the stars and the rotations and ...
Th. Schmidt-Kaler +2 more
openaire +2 more sources
Micro-Doppler effect in radar: phenomenon, model, and simulation study
IEEE Transactions on Aerospace and Electronic Systems, 2006When, in addition to the constant Doppler frequency shift induced by the bulk motion of a radar target, the target or any structure on the target undergoes micro-motion dynamics, such as mechanical vibrations or rotations, the micro-motion dynamics ...
Victor C. Chen +3 more
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American Journal of Physics, 1972
Expressions for the Doppler effect are derived without employing any assumption about the phase of a plane wave. It is shown that the invariance of this phase under both the Galilean and the Lorentz transformations is a trivial consequence of the mathematics and, is independent of its association with any physical process.
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Expressions for the Doppler effect are derived without employing any assumption about the phase of a plane wave. It is shown that the invariance of this phase under both the Galilean and the Lorentz transformations is a trivial consequence of the mathematics and, is independent of its association with any physical process.
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Analysis of rotational Doppler effect based on radio waves carrying orbital angular momentum
Journal of Applied Physics, 2018The electromagnetic beam carrying orbital angular momentum (OAM) has a twisted phase front, which can induce a rotational Doppler frequency shift when it is illuminating on a spinning object.
Jiayu Zheng +3 more
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Modeling and Analysis of Acoustic Noise in External Rotor In-Wheel Motor Considering Doppler Effect
IEEE transactions on industrial electronics (1982. Print), 2018In this paper, the characteristics of the electromagnetic noise radiated by an external rotor in-wheel motor (IWM) are investigated with the Doppler effect taken into consideration.
Fu Lin, Wenzhe Deng, Shuanglong Wu
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Equivalence of the Doppler effect, relativistic Doppler effect and scattering effect
Physics Letters A, 1970Abstract On the basis of an electromagnetic plane wave scattered by an electron, the relativistic Doppler effect is demonstrated equivalent to a two step Doppler effect. Further experimental verification for the conservation law according to the Compton-Debye theory is also urged.
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Journal of the Optical Society of America, 1981
An angular analog of the Doppler effect arising from the quantum of angular momentum carried by circularly polarized photons is presented and developed. Applications to rotational Raman scattering, fluorescence doublets, controlled frequency shifting of light, rotation-induced optical activity, and the measurement of rotational motion of small ...
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An angular analog of the Doppler effect arising from the quantum of angular momentum carried by circularly polarized photons is presented and developed. Applications to rotational Raman scattering, fluorescence doublets, controlled frequency shifting of light, rotation-induced optical activity, and the measurement of rotational motion of small ...
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Doppler effect in aeroacoustics [PDF]
The Journal of the Acoustical Society of America, 2008 Doppler effect in aeroacoustics The prediction of acoustic fallout caused at the ground level by aircraft in flight or by launchers at take-off sets the problem of the distortion of the emitted sound spectrum by the Doppler effect. Former studies applied to this problem use a geometrical formalism based on simplifying hypotheses such as homogeneous ...
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The Journal of the Acoustical Society of America, 1962
The problem of a massive particle moving along a stretched string and subjected to a time-varying force perpendicular to the string is treated by the method of characteristics. If the force varies harmonically explicit expressions may be obtained; these are displayed.
M. Stippes, E. V. Wilms
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The problem of a massive particle moving along a stretched string and subjected to a time-varying force perpendicular to the string is treated by the method of characteristics. If the force varies harmonically explicit expressions may be obtained; these are displayed.
M. Stippes, E. V. Wilms
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A Doppler Effect Based Framework for Wi-Fi Signal Tracking in Search and Rescue Operations
IEEE Transactions on Vehicular Technology, 2018We consider rescue missions in postdisaster scenarios with particularly difficult environments where no infrastructure is available. Given the increasing popularity of smartphones and wearable devices, this paper proposes a rescue system which uses the ...
Yuan-Yao Shih, Ai-Chun Pang, P. Hsiu
semanticscholar +1 more source