However, when the distance between the transmitter and receiver is limited, the received signal can be polluted by strong multiple echoes, which can significantly degrade temperature accuracy.
PMSE and PMWE layers are not the only types of anomalous radar echoes which can be measured in the middle atmosphere.
The new modality exploits the nonlinear propagation of ultrasound waves in human tissues, yielding the presence of significant harmonics in the ultrasound echoes, which can be selected on the receiver.
"It produces changes in the echoes which can identify the target [fish] in the bubble net, where man-made sonar does not work".
This makes it a more robust measure of scattering compared to raw echo intensity, which can be more readily extracted from the ADCP.
On the contrary, in the unified structure where the NR algorithm is simply placed before AES, it also introduces non-linear distortions on echo signal, which can disturb the identification operation.
Also, in the unified structure where the NR algorithm is placed before the AEC algorithm, it also introduces non-linear distortions on the echo signal which can disturb the identification operation [5].
This paper takes the polarization sensitive array for the model and combines with time-frequency analysis method for DOA estimation of HFSWR echo signals, which can make full use of the spatial, time-frequency, and polarized domain information of signals.
However, darker corners of the Internet have also been employed as echo chambers which can turn losers into apparent spokespersons.
SAN FRANCISCO (Reuters) - Amazon Inc on Thursday introduced two new gadgets similar to its voice-controlled Echo speaker, which can be used to check the weather, order Domino's pizza or hail an Uber car.
