Hi, David,
the USRP 2901 is a dual channel RTX, so it
can definitely receive two different channels at the same
time, i.e. two different (carrier) frequencies. We just have
to see the management through GNURadio, but here I refer to
those who are more experienced than me with the software.
In principle you can put a split downstream
of the antenna and then go on the two channel inputs, however
keep in mind that with the splitter you introduce a signal
loss that can go from 3.5dB to 5dB or more, depending on the
splitter (3dB is anyway theoretical and unavoidable). This
means that, not only do you have the loss value of the
splitter on the signal level, but even more marked the fact
that it worsens the noise figure by the same amount. If the
dynamics is enough it's fine, otherwise it would be better to
use separate antennas. Be careful not to go into transmission
on a channel if you use a splitter and a single antenna!
Claudio
Hi,
I am trying to simultaneously receive two signals from
Galileo at different frequencies (1176.45 MHz and 1575.42
MHz) using a single antenna, a USRP 2901, and the GNU
Radio Companion (GRC) software. I would like to know if it
is possible to do this with a single USRP, that is, is the
USRP able to receive two different frequencies at the same
time?
In the affirmative case, is it ok to just split the
incoming signal from the antenna with a splitter and
connect it to two ports the USRP?
Many thanks in advance,
David