In the W CDMA, {HEAD ~ the period} of {TAIL ~ the reference signal} is very large 
of
In the W CDMA , { HEAD ~ the period } of { TAIL ~ the reference signal } is very large
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH