jboone
commented
8 years ago I am investigating radio hardware configuration options that may reduce the LO leakage, or at least provide a hardware way of tuning it out. The IQ averaging to remove the DC spike is a bit more of a bandaid than I'd like, and will only implement that as last resort.
iq balancing seems neat in gqrx, perhaps you could check out gr-iqbal and do the same in firmware if it isn't too heavy.