2407219_en-US

[#1]

How can I implement UWB TDoA using SR250 as anchors and SR040 as a tag?

Hello,

I am trying to implement a UWB TDoA system using the following configuration:

• NXP SR250 devices as the master and slave anchors
• NXP SR040 as the mobile tag
• A host MCU connected to each SR250 anchor

The SR250 anchors need to receive blink messages transmitted periodically by the SR040 tag. The master and slave anchors will then use the received timestamps to calculate the tag position using TDoA.

I would like to confirm the following:

1. Can the SR040 transmit periodic blink messages that can be received and timestamped by multiple SR250 anchors?
2. Are the SR040 and SR250 compatible for this TDoA use case?
3. Is there an NXP reference implementation for an SR250 anchor and SR040 tag TDoA system?

Currently, I have an SR250 TDoA anchor application running on a QN9090 host. However, I could not find clear documentation or an example showing how to configure the SR040 as a compatible TDoA tag.

Any information regarding the required firmware, session configuration, blink frame format, and timestamp synchronization would be greatly appreciated.

Best regards.