Question about uniform random noise when calculating weight gradient

[dwookkim]

May I ask, why is uniform random noise added at the end of the non-ideal weight gradient calculation, in wage_quantizer.py line 74-75?

It may seem that the gradient calculated in line 73 is already quantized to the desired resolution. May I ask why the process of adding uniform random noise and re-quantizing the gradient is necessary?
Can someone please explain the reason for this? Thank you.