Hello all,
I'm trying to do ranging using two USRPs N210.
The idea is that the first USRP sends a signal and then the second USRP
recognize it and send the signal back. Looking to the turnaround time I
would be able to know the ranging.
Despite some problems that I already had, right now I'm stuck with the
second USRP.
To measure the time I'm synchronizing the rx ant tx from the first USRP
using the following code:
now = self.uhd_usrp_sink_0.get_time_now()
self.uhd_usrp_source_0.set_start_time(uhd.time_spec_t(0.1) + now)
self.uhd_usrp_sink_0.set_start_time(uhd.time_spec_t(0.1) + now)
Using the fisrt USRP I can do ranging, connecting both (rx and tx)
together, with a good precision. However I couldn't make the second USRP
work yet. When I try to synchronize the tx and rx like I did in the first
USRP I get a bunch of Ls (late packages) in the terminal. The code drop all
the packages.
My gnuRadioCompanion blocks for the second USRP looks roughly like
USRP Source -> threshold -> USRP Sink
There's a better way to solve that problem?
Why do I get the late packages?
Thanks in advance,
Rafael.
PS: To analyze the data that I'm sending I'm using File Sink block and
analyzing the data after the transmission.
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