Abstract: Multi-beam demodulators (6-1 to 6-NL) for low-rate user signals and multi-beam interference canceller demodulators (7-1 to 7-NH) for high-rate user signals remove interference components from corresponding beam signals and output a soft decision value as the demodulation result. Adaptive beam demodulators (12-1 to 12-NL) for low-rate user signals and adaptive beam demodulators (15-1 to 15-NH) for high-rate user signals perform demodulation by using the beam signals from which the interference components has been removed and output a soft decision value as the demodulation result. The demodulators for the low-rate user signals select and output an optimal soft decision value based on the SIR estimate and the demodulators for the high-rate user signals select and output an optimal soft decision value based on the SIR estimate.