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NVlabs / sionna

Sionna: An Open-Source Library for Next-Generation Physical Layer Research
https://nvlabs.github.io/sionna
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The gradient is None during backpropagation #576

Closed qiangdadi closed 1 month ago

qiangdadi commented 1 month ago

The gradient is None during backpropagation. I create the scene and make a environment object position be trainable. And then I calculate the path and cir during forwardpropagation. But I get None grad during backpropagation. I want to know if the object position is differentiable?

merlinND commented 1 month ago

Hello @qiangdadi,

Please refrain from posting duplicate issues as it increases the workload for maintainers.

As indicated in #575, you will need to provide more details so that we can help. Please post back in #575, including a minimal reproducing example script, and we will reopen the issue.