Results 201 to 210 of about 18,290 (263)
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Absence of the Relativistic Transverse Doppler Shift at Microwave Frequencies
IEEE Transactions on Instrumentation and Measurement, 2003An experiment is described showing that a 33-GHz microwave signal received by rotating antennas is not exhibiting the frequency shift ("transverse Doppler effect") predicted by the relativistic Doppler formula. The sensitivity of the apparatus used has been tested to be sufficient for detecting frequency shifts as small as 10/sup -3/ Hz which ...
exaly +2 more sources
Passive localization from Doppler shifted frequency measurements
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991An 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 ...
Yiu Tong Chan, J. J. Towers
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Doppler frequency shift estimation for differentially coherent CPM
IEEE Transactions on Communications, 1990A communication scheme based on continuous-phase modulated (CPM) signals used in conjunction with trellis-coded modulation (TCM) is considered. To keep the complexity manageable, a detection scheme based on differential detection of CPM signals is used.
Ezio Biglieri +2 more
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Comparison of methods for turbulence Doppler frequency shift calculation in Doppler reflectometer
Plasma Science and Technology, 2023Abstract The Doppler reflectometer (DR), a powerful diagnostic for the plasma perpendicular velocity (u ⊥) and turbulence measurement, has been widely used in various fusion devices. Many efforts have been put into extracting the Doppler shift from the DR signal. There are several commonly used methods for Doppler shift
Zhong, Xiaoming +18 more
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Adaptive Doppler frequency shift estimation for OFDM systems
2012 International Conference on Wireless Communications and Signal Processing (WCSP), 2012Orthogonal Frequency Division Multiplexing (OFDM) is sensitive to the system frequency offset, while in high speed movement Doppler frequency shift is the main factor which causes the system frequency offset and result in inter-carrier interference (ICI) and degrade system performance.
Qinghua Tian +3 more
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Localization by Doppler Derivatives and Doppler-Shifted Frequencies
IEEE Transactions on Signal ProcessingzbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiaochuan Ke, K. C. Ho 0001
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Prediction of Wind Turbine's Doppler Frequency Shifts
2020 New Trends in Signal Processing (NTSP), 2020This 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 +2 more
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Parameter Estimation Based on Doppler Frequency Shifts
IEEE Transactions on Aerospace and Electronic Systems, 1987An 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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