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