The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize, in real time, {HEAD ~ parameters} of receivers of the mobile stations for processing {TAIL ~ the following data signals} 
The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize , in real time , { HEAD ~ parameters } of receivers of the mobile stations for processing { TAIL ~ the following data signals }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL