Here, as the number of types of {HEAD ~ CAZAC sequences} used for {TAIL ~ the reference signal} is small, a sequence specific to each cell is allocated 
used for
Here , as the number of types of { HEAD ~ CAZAC sequences } used for { TAIL ~ the reference signal } is small , a sequence specific to each cell is allocated
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH