Hi Marcus, list,
Thanks for swift response.
You are right about openBTS, but at the same time I am using really old system (12.04) havent formatted for years due to its required installation, which can turn into real time consuming tasks thats why dragging it as long as I can avoid above situation.
Now Decimation, yes its seems right to me as well, but when I am trying to decode I am getting SCH errors (I am using channelizer.py given in GR example directory for this purpose) with following configuration