Base station apparatus, user apparatus, and {HEAD ~ method} of allocating {TAIL ~ reference signal sequences} 
of allocating
Base station apparatus , user apparatus , and { HEAD ~ method } of allocating { TAIL ~ reference signal sequences }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL