Doppler frequency

Doppler frequency

[däp·lər ‚frē·kwən·sē]
(physics)
References in periodicals archive ?
While conventional methods rely on Doppler frequency shift data to color encode blood flow velocity for visualization, ColorAngio emphasizes the Doppler amplitude spectrum.
The NXT2002 demodulator provides unmatched high Doppler frequency dynamic multipath performance that is necessary for DTV reception with an indoor or outdoor antenna.
Further, its excellent Doppler sensitivity, due to a dynamically variable Doppler frequency, makes it very well suited for scanning blood vessels near the surface of the body (peripheral vascular scanning).
The flexible software controls the Doppler frequency shift and signal time duration, thereby simulating to a [+ or -] 2 % uncertaint y the radar return for different vehicles from motorcycles to trucks moving at speeds of up to 120 mph.
By achieving 180 Hz Doppler frequency performance at DVB-H 16 QAM, 8 K, 2/3 CR, and 1/4 GI, mobile TV products using the S3C4F60 can achieve perfect reception of digital TV signals, even inside high-speed trains like the TGV, ICE, or Shinkansen traveling at speeds of up to 300Km/hour.
Scenario generation that includes speed of the target, opening or closing Doppler frequency addition;
Therefore, a physical property of millimeter-waves can be exploited to gain larger Doppler frequency shifts than in the case of using the microwave band.
Moving a hand or foot causes the receiver to detect a pattern of changes known as the Doppler frequency shift.
They cover basic concepts like physics and instrumentation and Doppler frequency spectrum analysis and ultrasound blood flow imaging, then the ultrasound assessment, normal findings, management, and other aspects of cerebral vessels, extremity arteries and veins, and the abdomen and pelvis.
As just mentioned, DTR radar uses the Doppler frequency shift, [delta]f, in the frequency of the reflected microwave signal that is used to determine speed.
In the past few years, it is becoming well-known that Pioneer spacecraft has exhibited an anomalous Doppler frequency blueshifting phenomenon which cannot be explained from conventional theories, including General Relativity [1, 4].