Results 281 to 290 of about 121,274 (339)

Passive localization from Doppler shifted frequency measurements

[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991
An efficient search scheme for an underwater radiating source is developed by introducing intermediate variables which are products of some of the unknowns. The search dimension is only two, in x-y position, instead of five. The resultant intermediate equations become linear and are easier to solve; the major calculation at each grid point requires an ...
Y.T. Chan, J.J. Towers
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Prediction of Wind Turbine's Doppler Frequency Shifts

2020 New Trends in Signal Processing (NTSP), 2020
This article deals with the prediction of the dominant Doppler frequency shifts of the wind turbine blades. Spread-spectrum of the Doppler frequency shifts of wind turbine blades can mask the radar targets. Current filtering methods are designed to filter only the complete radar resolution cells in places where wind turbines are located. However, these
Karel Juryca, Jan Pidanic, Heru Suhartanto   +2 more
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Photonic Radio Frequency Memory with Controlled Doppler Frequency Shift

2019 International Topical Meeting on Microwave Photonics (MWP), 2019
A photonic Radio Frequency (RF) memory with coherent frequency shift and time gated amplifying recirculating delay line is proposed. It can simultaneously control Doppler frequency shift (DFS) and RF storage time. The coherent frequency shift is realized by the beat between the carrier with acoustic-optic modulator (AOM) frequency shift and sideband ...
Zhidan Ding, Fei Yang, Haiwen Cai, Yongxiang Weng, Mingjun Wang, Dongjin Wang   +5 more
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Parameter Estimation Based on Doppler Frequency Shifts

IEEE Transactions on Aerospace and Electronic Systems, 1987
An acoustic source generates an amplitude-modulated tone, with Doppler variations due to the relative motion between source andreceiver. A method is presented for real-time estimation of tone restfrequency and minimal distance between source and receiver, usingdigital signal processing techniques.
Joseph Statman, Eugene Rodemich
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Doppler frequency shift of sound apparatus

The Physics Teacher, 2011
A large 1-m diameter rotary table with a semicircular waveguide along its periphery is the basis of the Doppler frequency shift of sound apparatus. A “button” speaker is attached to the outer edge of the rotary table and a microphone pickup is positioned on the wall of the waveguide at its midpoint.
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Atomic Frequency Standard Relativistic Doppler Shift Experiment

28th Annual Symposium on Frequency Control, 1974
An experiment has been performed to measure possible space anisotropy as it would effect the frequency of a cesium atomic beam standard clock in a laboratory on earth due to motion relative to external coordinate frames. The cesium frequency was measured as a function of orientation with respect to an atomic hydrogen maser standard.
H.E. Peters, V.S. Reinhardt
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Localization by Doppler Derivatives and Doppler-Shifted Frequencies

IEEE Transactions on Signal Processing
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiaochuan Ke, K. C. Ho
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Frequency Detuning Control by Doppler Shift

2011
In this work, a control strategy for ship parametric roll resonance is developed by changing the frequency of the parametric excitation. This is achieved by varying the ship’s forward speed. This changes the perceived frequency of the waves, known as the encounter frequency (and thus the frequency of parametric excitation), via Doppler shift.
Christian Holden, Dominik A. Breu, Thor I. Fossen   +2 more
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