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