Did nrf54L15 can support https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/bluetooth/nrf_dm/README.html ?

[Jon-Yang]

Hi  , Support 

Since I only have one development board each for Nrf52840DK and NRF54L15, I would like to know whether Distance Measurement with Bluetooth LE discovery can be used on the NRF54L15. If I want to run Nordic's sample code, what modifications are needed?

[SwRa]

Hello,

Unfortunately, The Nordic Distance measurement library is not supported on the nRF54L15 and hence it is not possible to run the sample. the "Bluetooth: nRF Distance Measurement with Bluetooth LE discovery" sample is officially supported on the following development kits: nRF5340 DK, nRF52 DK, nRF52840 DK, and nRF52833 DK. 

Best Regards,

Swathy

[Jon-Yang]

HI ，SwRa

Thank you for your reply!

I have another question. Could you briefly explain the measurement principle of Distance Measurement with Bluetooth LE discovery? Some materials I've seen mention that it is based on phase shift calculations. What are the similarities and differences between this and the CS (Channel Sounding) measurement in Bluetooth 6.0? Which one offers more accurate measurement results?

[SwRa]

Hello,

You can find a brief explanation about the two here: https://www.nordicsemi.com/Products/Wireless/Bluetooth-Low-Energy/Channel-Sounding 

Both the Channel Sounding as well as Nordic Distance measurement library(NDT) uses phase based  ranging and RTT as core principle.. The key difference is that NDT is Nordic Proprietary whereas Channel sounding is an open standard (a standardized feature of Bluetooth 6.0). NDT is highly optimized, but has less flexibility. Channel sounding has security built in and NDT is only non-secure. 

Jon-Yang said:

Which one offers more accurate measurement results?

Performance is expected to be in the same range with single antenna in Channel sounding and NDT. But Chanel sounding supports more antennas that will improve the performance.

I suggest that you go through the following as well: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/nrf_dm/doc/nrf_dm_overview.html https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/softdevice_controller/doc/channel_sounding.html and 

Best Regards,

Swathy