Dect NR+ Subcarrier scaling factor and subslot

[emindrmus]

Hello,

I am working with the NRF9151 DK on DECT NR+ and I want to change the subcarrier scaling factor and subslot value in the hello_dect example. However, I am not sure how to do this. Can I make these changes through software, or is there a hardware limitation? Could you assist me with this?

[dejans]

Hi,

I will check this internally and get back to you by the end of this week.

Best regards,
Dejan

[emindrmus]

There is a struct called nrf_modem_dect_phy_capability in the nrf_modem_dect_phy.h file, which contains the mu (subcarrier scaling factor) value. However, I can't find where it is used or where these values are initialized. I am expecting feedback on this.

[dejans]

Hi,

The value of mu is hard-coded to 1 in the modem.

Best regards,
Dejan

[emindrmus]

So, what is the difference between 'hello dect' sample and 'dect_shell' samples about speed. When I have communicated between two ntf9151dk devices in hello dect sample and dect_shell sample there are a lot of speed differences. I can send 700byte in 2.23ms dect_shell sample However, in the hello_dect example, it drops packets even when sending 496 bytes in 1 second. And this two mu's is equal.

Isn't the MU constant not directly related to speed, and why is there such a big difference between these examples?

[dejans]

Hi,

Can you provide information about your testing environment?

Can you provide information about your setup and used tools when you tested the speed in each of the samples?

Can you provide detailed results of your testing?

Did you use both of the samples as-is or did you make some modifications to the source code?

Which software release version do you use?

Best regards,
Dejan