On 15/08/2023 05:43, Ali G. Dezfuli wrote:
Hi all,
I have two transceivers A and B each one is connected by cables to a
USRP B200mini (TX/RX for send and RX2 for receive)
Using GNU Radio, for each iteration, transceiver A starts to send a
burst of RC-filtered, BPSK-modulated PN sequence.
Side B waits for the burst and as soon as it gets that (by
correlation), detects the
phase ramp (because of the carrier frequency offset (CFO)) on the PN
symbols
and makes a new burst with the same phase ramp, and sends its burst
back to side A.
Then I observe the phase of the received symbols at A.
As far as there is no sample loss/insertion, I suppose the phase
continuity is held and
should receive a constant phase on the received symbols at A whose
value depends
on the delay between A and B which is fixed.
I observe these issues:
1- in some iterations, the received phase at A is not fixed.
2- in some iterations, the received phase at A is fixed but does not
equal other iterations.
Would be grateful if anyone could help me with this.
Thanks!
_______________________________________________
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-le...@lists.ettus.com
You haven't noted whether the two USRPs are syncrhonized or not.
Two radios that are not synchronized to a common clock will NOT have
mutual phase-coherence over any
non-trivial interval.
Are you running RX continuously, or starting/stopping streams?
_______________________________________________
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-le...@lists.ettus.com
