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