CDMA SYNCHRONIZATION DETERMINING APPARATUS

摘要

PROBLEM TO BE SOLVED: To accurately determine synchronization with accuracy, without bringing about synchronizing by mistake, even when there are multiple fingers allocated to error and noise of the synchronous timing in a mobile communication system adopting a DS-CDMA method. SOLUTION: Number-of-error bit calculators 107-1 to 107-N calculate the numbers of the error bits of received pilot symbols at the respective fingers. A minimum number-of-error bit selector 108 selects the minimum number of the error bits of the number of the error bits calculated from the respective fingers. A number-of-error bit deciding unit 110 compares the minimum number of the error bits with the allowed number of the bits. A forward/reverse protection unit 111 conducts forward/reverse protection the decided result, and prevents the wrong decision due to noise. A synchronization decision determining unit 112 receives information as to whether the forward and reverse protection from the unit 111 is cleared, and outputs a synchronization decision result.