A PL demodulating unit (203) demodulates a pilot signal in a received signal. An SIR determining unit (205) determines the reception quality of the demodulated pilot signal. An fd determining unit (206) determines the Doppler frequency by use of the demodulated pilot signal. A requested-modulation-mode deciding unit (207) uses the reception quality of the pilot signal and the determined Doppler frequency to decide the modulation mode for which to request the base station apparatus. A command generating unit (208) generates a command corresponding to the decided modulation mode. An adaptive demodulation unit (204) demodulates the received signal by use of the demodulation mode corresponding to the modulation mode decided by the requested- modulation-mode deciding unit (207). In this way, the reception quality can be kept high even under a fading condition.