Finally, a GNURadio block to remove that IQ DC spike just like some software and drivers do! Just drop it in your flowgraph after your radio source and rock on. No more offset tuning to get rid of that spike, now you can use the whole bandwidth.
Update:
Added 2 new blocks. One that starts with auto-learning then switches to standard DC offset with the results to avoid any potential filtering. This block takes frequency and upstream (radio-side) gain as parameters and if they change auto-recalibrates. The second block is just a manual offset block that can be used for manual tuning.
Build is pretty standard:
mkdir build
cd build
cmake ..
make
make install
ldconfig
None. Complex in, complex out.