Patent ID: 7830818

Claim:
A reception quality measurement method implemented in a mobile station that receives F-DCPH (Fractional Dedicated Physical Channel) symbols and CPICH (Common Pilot Channel) symbols from a base station, the method comprising: implementing a first estimation that estimates a channel on the basis of an average of a plurality of CPICH symbols in a time sequence before a certain time of interest, then calculating an interference power ISCP (Interference on Signal Code Power) using a channel estimation value obtained by the first estimation and the CPICH symbol at the time of interest; implementing a second estimation that estimates a channel on the basis of an average of a plurality of CPICH symbols in a time sequence that include the CPICH symbol at the time of interest, then calculating a reference ISCP using a channel estimation value obtained by the second estimation and the CPICH symbol at the time of interest; correcting an interference power ISCP at the next time of interest using the difference between the ISCP and the reference ISCP; and calculating a signal to interference power ratio SIR of the mobile station using the ISCP obtained by the correction and a reception power RSCP (Received Signal Code Power) of the F-DCPH symbol.