Sentence examples for frequency of the echo from inspiring English sources

Then, the amplitude spectrum is used to determine the frequency of the echo signals.

The Doppler shift of echo frequency results from the movement of the wing increasing and decreasing the frequency of the returning echo as they beat toward and away from the bat (Schnitzler and Denzinger, 2011; Fenton et al., 2012).

For PCI and SSE, they both detect the target and give right estimation of normalized Doppler frequency of the target echo which is 0.049.

Horseshoe bats are able to couple the frequency of the returning echo to their reference frequency independently of the size of Doppler shifts with extreme accuracy [ 57].

Now time-frequency transformation of the echo signal is carried out in the same simulation condition as Figure 1, as shown in Figure 3. Figure 3 Micro-Doppler modulation induced by target.

In horseshoe bats, the RF is maintained with high accuracy (standard deviation ± 50 Hz in the present study) to keep the frequency of the returning echoes constant and within the bats' best range of hearing.

Previously, we established the echo model of target with micro-motion, and time-frequency transformation of the echoed signal is applied to gain the time-varying micro-Doppler frequency features of target.

Estimation of micro-motion parameters is completed through time-frequency transformation of the echoed signal and Radon transformation in terahertz band, and NLS and the CLEAN algorithm are utilized to estimate the scattering coefficients of each scatterer.

The non-Doppler radars provide estimates of precipitation intensity, while Doppler radars can also provide estimates of wind speed and direction by detecting a shift in the frequency of an echo produced by a moving target.

The main bulk translation of the target towards or away from the sensor induces a frequency or Doppler shift of the echo as a result of the well-known Doppler effect.

It is also shown that by zero frequency filtering the echo signals are composed effectively only of the direct coherence pathway.