Implementation

How does DFE work?

• Signal enters the DFE system and gets stored in  frequency domain buffer

• iFFT converts the signal from frequency to time domain.

• Converted digital signal undergoes windowing process (simulation shown below)

• Pulse-Shaping Filter prepares signal for digital-to-analog conversion.

These graphs demonstrate the effect of windowing on a sample digital signal. The main difference is that the signal data ranging from approximately -0.5Mhz to 0.5Mhz is located below 0dB in the right-side graph. This indicates that the noise or interference in this frequency range is being attenuated, making the original substance of the signal cleaner and more prevalent.

Testing

In order to determine if the obtained results are right, we compared the resultant windowed graph with one provided by Jabil from their simulation. These plots were a very close match, reaffirming that the algorithm worked as expected. The graphs can be found below: