Hello All,
As I have stated in the past Im interested in VNA style measurements.
Specifically S21. From what I have read and found out experimentally I
need
two coherent recievers to do this. And thus I need MIMO or something
MIMO
like.
The wiki provides the following information (
http://gnuradio.org/redmine/wiki/1/USRP2GenFAQ#What-are-the-different-ways-MIMO-can-be-set-up-with-more-than-one-USRP2).
These
methods are in development according to it with a time hack of (14
November
2008). Thus they are not available is what I understand from the wiki.
Any
updates?
Scenario 1 - Two USRP2 systems connected by a MIMO cable:
Scenario 2 - Up to Four USRP2 systems connected by MIMO cables to the
not-yet-in-existence HUB:
Scenario 3 - An arbitrary number of USRP2 systems, no MIMO cables, no
HUB:
Now it looks like MIMO is available or Scenario 1. But it requires the
UHD
driver and an updated GRC version. Is this correct? How do I
differentiate
between whether I have this functionality or not? Is there a way to
query
the USRP and find this? I didn’t build GRC myself. I have
v3.3.1git-47-gf6337c62. Is this the right version?
Thanks,
Justin.