A system separates {HEAD ~ unknown signals} which have been combined together through {TAIL ~ unknown linear filters} and for which observations at multiple sensors are made 
combined together through
A system separates { HEAD ~ unknown signals } which have been combined together through { TAIL ~ unknown linear filters } and for which observations at multiple sensors are made
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH