Nonstationarity broadening reduction in pulsed Doppler spectrum measurements using time-frequency estimators

1996 ◽  
Vol 43 (12) ◽  
pp. 1176-1186 ◽  
Author(s):  
J.C.S. Cardoso ◽  
M.G. Ruano ◽  
P.J. Fish
Keyword(s):  
Doppler Spectrum ◽  
Pulsed Doppler ◽  
Time Frequency ◽  
Spectrum Measurements

High Resolution Doppler Spectrum Measurements of 3-meter Auroral Irregularities at Large Magnetic Aspect Angles

1987 ◽  
Vol 35 (6) ◽  
pp. 910-916 ◽  
Author(s):  
C Haldoupis ◽  
G J Sofko ◽  
J A Koehler ◽  
P Prikry ◽  
A G McNamara
Keyword(s):  
High Resolution ◽  
Doppler Spectrum ◽  
Spectrum Measurements

Simulation of real-time frequency estimators for pulsed Doppler systems

1986 ◽  
Vol 8 (4) ◽  
pp. 252-271 ◽  
Author(s):  
G VANLEEUWEN ◽  
A HOEKS ◽  
R RENEMAN
Keyword(s):  
Real Time ◽  
Pulsed Doppler ◽  
Time Frequency

Research on Ramanujan-FMT Modulation and the Efficient Implementation Algorithm

2013 ◽  
Vol 380-384 ◽  
pp. 1693-1696
Author(s):  
Li Na Zhou ◽  
Jia Dong Shang ◽  
Lan Yang
Keyword(s):  
Signal Processing ◽  
Fourier Transforms ◽  
Low Frequency ◽  
Doppler Spectrum ◽  
Frequency Noise ◽  
Spectrum Estimation ◽  
Time Frequency ◽  
Modulation And Demodulation ◽  
Awgn Channel ◽  
Ramanujan Sums

Ramanujan Sums (RS) and their Fourier transforms attract many attentions in signal processing in recent years. Thanks to their non-periodic and non-uniform spectrum, RS are widely used in low-frequency noise processing, e.g., Doppler spectrum estimation and time-frequency analysis. We proved the transforms can be perfectly reconstructed under certain circumstance and built a multi-tone system using Ramanujan Fourier transforms as modulation and demodulation. This system got a lower BER in AWGN channel compare to OFDM.

Evaluating carotid artery disease. The concordance between pulsed Doppler/spectrum analysis and angiography

1983 ◽  
Vol 9 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Y. Langlois ◽  
G.O. Roederer ◽  
A. Chan ◽  
D.J. Phillips ◽  
K.W. Beach ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Spectrum Analysis ◽  
Carotid Artery Disease ◽  
Doppler Spectrum ◽  
Pulsed Doppler ◽  
Artery Disease
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