Hi,
I’m trying to use Heimdall to calibrate a Kraken SDR. Heimdall is running on a raspberry pi where the Kraken is attached and I have GNU Radio running on my computer. I tried to receive the radio signals at 97.9 MHz and I did two different tests. For the first one i wanted to see if the phase is stable and if I compare the phase of my standard channel (the 0 one) to the other it would be close to zero (since all the antenna are very close to each other I expected it to be close to zero). And the result was what I expected.
However if I watch at the real part of every signals, the signal 5 has an opposite phase compare to the other and it’s not coherent with what I had before. I don’t understand why.
Also could one, in theory, use the off-the-shelf gr-osmosdr with their https://gitea.osmocom.org/sdr/rtl-sdr.git for all 5 antennas separately and implement a custom adaptive calibration during runtime using the AIS signals bursts or should one somehow disable all Heimdall calibration features and still use the gr-krakensdr block for this?
Thank you in advance for your help!