I have an eight element circular antenna array and I want to do beamforming using eight N210s in receive mode. So, I distributed 10MHz/1PPS reference to each N210 to synchronized them and routed the eight GbE ports through a switch to the computer. I store data from each channel in one file/channel using gnuradio companion. Later I want to do beamforming processing.
Now, when I start receiving the data, there is a fixed phase offset from channel to channel. That's OK as long as I know how much is it. The problem I am facing is that this phase offset is random each time you start acquiring the data. Now how can i know about it to make a correction in the array processing. Is there a way to fix it or take care of it in system calibration?
Khalid.