Patent ID: 7406122

Claim:
An equalizer comprising: a filter factor computing device to compute a filter factor; an equalizing filter to operate based on a filter factor computed by said filter factor computing device and to a received signal to obtain an output signal; a differential detecting circuit to detect a differential between the output signal from said equalizing filter and a common pilot diffusing code and to input the detected differential as a differential signal to said filter factor computing device; and an initial value setting circuit to set an initial value for said filter factor computing device based on said received signal; wherein said initial value setting circuit comprises a multipath timing detecting circuit to detect multipath timing by receiving said received signal and said common pilot diffusing code, a reverse diffusing circuit to which a path timing signal is fed from said multipath timing detecting circuit, and to which said received signal and said common pilot diffusing code are input, and a channel estimating device to estimate a channel based on an output signal from said reverse diffusing circuit.