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