Hello.
I need to implent a two way ranging. A device send an “echo”, a second device
discover the “echo” and send a reply, then the first device can calculate the
distance. For a correct distance evalutation, the second device must calculate
the time elapsed between the discover of the first echo and the reply response.
Let’s assume that the second device is a SDR with gnu radio & USRP1 device.
The problem is: how to time-correlate the streaming sample received from the
USRP and the streaming sample transmitted to the usrp.
If i pre-fill the usrp transmit buffer with dummy data (preventing underflows)
before starting acquisition&transmission, then i can correlate the two streams,
right? (Yes, with the hypothesis that i don’t miss data from usb).
Thank you
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