{HEAD ~ A second set} of narrowband signals may then be recovered from the second set of {TAIL ~ sampled signals} 
{ HEAD ~ A second set } of narrowband signals may then be recovered from the second set of { TAIL ~ sampled signals }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL