In
intermediate frequency interval, the tooth fracture model does not show an obvious peak in deformation and acceleration amplitude spectrum, while the peak value of healthy tooth model is very obvious.
"Resetting" of distance to 0 at certain distances suggests that the phase measurement is conducted on
intermediate frequency. Since there is no significant correlation between distances and their corresponding DQF's, an insightful investigation is required to determine if DQF can be used for example for weighting of distances.
Thus, each receive channel is down converted to the same
intermediate frequency band centered at 5.8 GHz.
From the
intermediate frequency region, it is observed that the slope value is greater than that observed in the 3% NaCl-diesel solution and similarly the phase angle value (Figure 2).
At the present stage, it is reasonable to use FPGA device, which provides favorable conditions for the down conversion process of the software radio digital
intermediate frequency with its abundant inside resource, parallel processing capacity, and efficient algorithm structure and reconfigurable, to realize the down converter.
The VSA consists of the new NI PXIe-5605 downconverter, the NI PXIe-5653 local oscillator synthesizer and the NI PXIe-5622, a 150 MS/s
intermediate frequency (IF) digitizer.
Major characteristics of the radar sensor Carrier frequency 36 GHz Repetition frequency 20 kHz Pulse duration 100 ns Pulse power 20 W Receiver noise figure < 5 dB
Intermediate frequency 9 GHz Antenna pattern width: in azimuth [0.25.sup.0] in elevation [3.sup.0] Rotation velocity of the antenna system 0.25 rev/s Power consumption <1 kW Mass < 150 kg Antenna height 5-10 m
Following the PSpice model of the (
Intermediate Frequency) IF stage, we were able to transfer our signal data to Matlab and process the data through digital filter methods.