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Next, this slide shows the calculated moving average of 20 points for the power of the transmitted and received signal waveforms.
Looking at the figure on the lower right, we can see that 20 [dB] can be achieved by antenna cancellation and 30 [dB] can be achieved by digital cancellation.
Next, let's look at the interference signal to noise ratio (INR) to examine whether the magnitude of this self-interference cancellation is sufficient.
For the INR here, the interference signal to noise ratio before passing through the ADC is the INR, and it is desirable that this value be 50 [dB] or less.
In this demonstration experiment, it can be seen that INR = 20 [dB] as shown in the lower right figure.
Therefore, it can be said that it was possible to show by actual machine experiments that enough self-interference can be removed by the proposed method.
Ultimately, this 20 [dB] INR can be further reduced using digital canceling. |
IEEE/ICACT20210238 Slide.14
[Big Slide]