RTOS/CC2640R2F: Questions about AOA

user5922801

Prodigy 80 points

Part Number: CC2640R2F

Tool/software: TI-RTOS

Hi,

I have two questions.

1.About AOA receiver,In broadcasting mode, does it support multiple sending devices to sample IQ at the same time?

2.When we receive with a single antenna, the IQ positive basalt period and sampling period are not consistent. It is found that the frequency of the transmitting device drifts. What is the cause of this drift? As shown in the figure

over 6 years ago

0 J Lindh over 6 years ago

TI__Guru 57865 points

Hi,
With the current SDKv.3.10, we do not support connectionless AoA. Assigning an expert to comment on your second question.

0 Yuval G over 6 years ago

TI__Intellectual 2430 points

Hi,

Regarding your second question:

The reason for the drift is a clock crystal inaccuracy.
This effect is actually doubled as there are 2 different clocks when communicating between different devices (TX & RX)

This should be within the norm and is mentioned in the device datasheet.

Best Regards,
Yuval

0 user5922801 over 6 years ago in reply to Yuval G

Prodigy 80 points

Hi Yuval,
thank you for you reply!

On the first question, I think my expression may be problematic, not absolute. At the same time, I want to know whether each sample can know the sampling of that device. If there are multiple transmitting devices working at the same time, how many transmitting devices can the receiving device support, without affecting the IQ sampling?

0 Yuval G over 6 years ago in reply to user5922801

TI__Intellectual 2430 points

Hi,
As mentioned before we do not support, connectionless AoA on the current SDK so assuming you have an RXing device for every TXing device you should be able to receive each of the transmitting nodes.

Which SDK are you currently evaluating?

Best Regards,
Yuval

0 user5922801 over 6 years ago in reply to Yuval G

Prodigy 80 points

Hi Yuval,
thank you for you reply! I use 2.3 sdk. I would like to ask whether the current SOA in sdk3.1 is based on connection or broadcasting. Does it support one RX and multiple TX in broadcast mode?

0 Yuval G over 6 years ago in reply to user5922801

TI__Intellectual 2430 points

Hi,

AoA is connection based, single TX single RX.

Best Regards,
Yuval

Bluetooth®︎

Bluetooth forum

RTOS/CC2640R2F: Questions about AOA