A mobile station receives first and second signals from first and second antennas. A plurality of fingers each demodulate the signals for one propagation path. A Rake combiner combines the demodulated signals by removing phase fluctuations among the fingers. Each finger includes a correlator descrambling the first and second signals for the propagation path, a channel coefficient calculating section calculating first and second channel coefficients of the descrambled signals, first and second average channel coefficient calculating sections calculating first and second average channel coefficients of the first and second channel coefficients, respectively, a synchronous detector performing a synchronous detection upon the descrambled signals using the average channel coefficients, and a channel coefficient clearing section detecting a path switching of the first and second signals to clear either one of the first and second channel coefficients or one of the first and second average channel coefficients.