Hello everyone, I am hoping someone can help.
I am trying to run my LimeSDR USB in MIMO mode, fullk duplex with GNU Radio. My flow graph is very simple, but I cant seem to get it to work. If I have the LimeSDR source in MIMO mode with both outputs connected to a LimeSDR sink MIMO mode (basically a simple throughput flow graph) and execute the flow graph, I can see the two inputs on an FFT, but if I connect a Spectrum Analyzer on the output, there is nothing there. I don’t see any errors in the GNU Radio window, it seems it should be working. Even stranger is if I take two UDP sources and UDP sinks (127.0.0.1, different ports) and insert them in between the flow graph works great, it is only when I connect it directly, it does not work. I am attempting to make a coherent noise canceller with delays, and I had it working on an earlier version of GNU Radio, but the version I have not and any later version doesn’t work as described above. I have attempted many things, even setting the cal BW to 0, but nothing seems to make a difference besides injecting a UDP transport into the streams.
GNU Radio Version: 3.7.11
INFO: Connected Control port: LimeSDR-USB FW:4 HW:4 Protocol:1 GW:2.23
This problem just seems to be related to how GNU Radio is interfacing with the LimeSDR. Like I mentioned I had this working and I am not sure why it stopped working…
Any help would be greatly appreciated! Thank you!