How is distance calculated in MCPD in NRF Distance Measurement Example

[Kaviya]

I am using the NRF distance measurements examples between two nRF5340 boards to calculate the distance between them. I want to know how the distance is calculated in phase difference method .

I have gone through this ppt /cfs-file/__key/communityserver-discussions-components-files/4/2870.Measuring_5F00_distance_5F00_with_5F00_Nordic_5F00_Distance_5F00_Toolbox_5F00_slides.pdf.

I understands after synchronization , the two devices transmits ADV_IND between them. I also see some continuous waves being transmitted among the ADV_IND packets after synchronization.  I would like to know the mechanism in which the distance is being calculated and why we are transmitting some continuous wave in between BLE LL Packets.This would give me a better idea about the Ranging procedure.

Thanks and Regards ,

Kaviya

[Edvin]

Hello Kaviya,

The distance toolbox is a closed-source implementation, so I can't give too much detail on how the distances are estimated.

I can say that the devices use standard BLE for setting up the measurements, but the measurements themselves use proprietary radio signals. The principles are described in the slides that you linked to, but other than what's already there, I don't have much to share, unfortunately.

Best regards,

Edvin

[Kaviya]

Thanks Edvin!