{HEAD ~ A switching system} of {TAIL ~ a MIMO mode} is provided according to another aspect of the disclosure 
{ HEAD ~ A switching system } of { TAIL ~ a MIMO mode } is provided according to another aspect of the disclosure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH