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