Hi All,
So my ultimate goal is to get the CSI
(Channel State Information) between 2 Tx antenna (1st
B210) and 2 Rx antenna(2nd B210). So that each
antenna at Rx will have 2 CSI measurement.
Attached is my picture of the flowgraph.
To build this scenario, I have used the
“Tx_OFDM” and “Rx_OFDM” from Gnuradio examples. I am using a
text file to be transmitted. Exact same blocks are used twice
(to make 2 channels) and fed into an USRP sink.
At receiver side USRP source is used with
other blocks to decode. & Tag Debug box is added to read
the CSI at console.
This setup work fine. But I am seeing only
1 CSI measurement at each Rx antenna. This is because I am
transmitting the same signal at same time from 2 Tx antennas,
so it is arriving at the same time at Rx thereby the 2 CSI
values are accumulated ( I am guessing) !
I have tried to add a delay in one tx
antenna, but the result was same.
Now I am trying to transmit from 1 antenna
at a time. So 1st Tx antenna signals will be
received at both Rx antenna thereby give 2 CSI measurement. It
will then stop transmitting and the 2nd Tx antenna
will start transmitting which will also give CSI from 2 Rx
antenna.
So I wanted to know if this
enabling/disabling of antenna (TX/RX) port is possible or not.
If it is not possible, what are the
possible workarounds?
Thanks,
Ayaz