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