eventual detected symbols typically channel estimates are derived from pilot symbols included in the transmitted signal but data symbols and other known symbols may also be used in the 3gpp standard two channels have pilot symbols that are suitable for channel estimation when receiving dedicated channels the dpch and the cpich as described in u201c physical channels and mapping of transport channels onto physical channels fdd u201d 3g ts 25 211 ver 3 3 0 june 2000 referring again to fig3 only the dpch is rotated with w 1 w 2 the cpich is not affected by the fbi sent from a ue to the bs the ue must know the phase offset u03c6 to use the cpich in channel estimation for maximum ratio combining since only the signal transmitted via antenna ant 2 312 2 is rotated the channel estimates from ant 2 312 2 may be used to obtain the phase offset u03c6 accordingly this application describes an optimal way of combining information from several fingers to obtain a phase estimate the following is a mathematical derivation of applicants 39 method of estimating the phase offset between two channels once the phase offset is estimated the cpich may be advantageously used in channel estimation let the second antenna channels for cpich and dpch represented by the subscripts 2 c and 2 d be given by the following expressions respectively where i u2208.