Finding paths with 0ns delay

[chrpapadopoulos]

Hello everyone!

I have built an indoor scene using blender and using it to find the coverage map and paths between a single Tx and Rx. The wierd thing is that sionna always comes up with one path that has 0ns delay. I don't know how this can be a correct value. Am I missing something?

This happens even if I move the Rx to another position as well.
Is this something due to the machine floating point precision? Or maybe something wrong with the scene I have built?

Or maybe it's related to this discussion? #626

I'm using v0.18.0 at the moment.

Do tell if you need more details on code or scene.
Thank you!

[SebastianCa]

Hi @chrpapadopoulos,
per default Sionna normalizes the path delays such that the first path arrives at time t=0 (see RT tutorial for an example). This behavior can be controlled via the normalize_delay property of Paths.
I hope this answers your question.

[chrpapadopoulos]

Yes indeed that is what I missed. I can set it to false to get the absolute values if I need to.

Thank you very much!