Patent ID: 8085736

Claim:
A CDMA (Code Division Multiple Access) receiving device which performs a CRC (Cyclic Redundancy Check) determination of a decoding result of a BCH (Broadcast Channel) in which broadcast information is mapped, when SFN (System Frame Number) timing of a cell, which is detected in a cell search, is detected, characterized in that the device comprises: measuring means for measuring an electrical power value of a P-CCPCH (Primary Common Control Physical Channel) in which said BCH is mapped, and detection means for detecting the SFN from the CRC determination result and a determination result of comparing a measurement result of said measuring means and a predetermined threshold, wherein: in order to detect a TTI (Transmission Time Interval) boundary when decoding said BCH, a decoding process is performed from a P-CCPCH of 2 frames, for each frame, said CRC determination is performed, and electrical power of said P-CCPCH of said 2 frames is measured a synchronization determination of said TTI from continuity of said SFN in said decoding result of said BCH is performed; and a determination of continuity of said SFN is performed in cases in which the electrical power value of said P-CCPCH does not satisfy said threshold value.