Direction finding packet

RE: Direction finding packet

Simonr — Thu, 25 Apr 2019 06:23:57 GMT

Hi Dave

Please create a new ticket on this matter, as we try to keep each subject in separate tickets here on DevZone.

Best regards,

Simon

RE: Direction finding packet

Dave — Wed, 24 Apr 2019 21:42:49 GMT

Simonr What is the most direct path to get a PCB up and running with nRF52811 5.1-compliant AoA Continuous Tone transmissions? And how about CT reception and I/Q data reporting for AoA calculation?

RE: Direction finding packet

Simonr — Wed, 10 Apr 2019 09:19:38 GMT

Hi Fred

Yes, Quuppa does this, but technically this is proprietary, as they are not implementing AoA according to the Bluetooth specification. So just to clarify, you will have to use nRF52811 transmitters (and receivers) to implement direction finding as the Bluetooth spec. is suggesting.

Best regards,

Simon

RE: Direction finding packet

Fred — Wed, 10 Apr 2019 09:01:37 GMT

This is technically correct for BLE 5. However, companies (such as Quuppa) have used AoA with standard / older BLE 4 transmitters. So it depends on how far you want to go with your own receiver development.

RE: Direction finding packet

Simonr — Wed, 10 Apr 2019 08:57:06 GMT

Hi Lorenzo

It is not possible to use older chips as AoA transmitters, as according to the Bluetooth specifications, you have to send special direction finding signals" that won't be possible to send from chips not supporting Bluetooth 5.1. It is possible to send AoA transmissions in other ways, but this will be out of the Bluetooth spec. and therefore proprietary. So to implement direction finding in nRF products, both transmitter and receiver must be nRF52811.

This blog post is great for learning about how direction finding is implemented in the Bluetooth stack.

Best regards,

Simon

RE: Direction finding packet

Fred — Tue, 09 Apr 2019 19:28:20 GMT

There is no requirement for the transmitter. The receiver (that has two or more antennas) will be doing the hard work.