COMMUNICATION TERMINAL, BASE STATION UNIT AND COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a communication terminal that can excellently maintain reception quality even under a fading environment. SOLUTION: A PL demodulation section 203 demodulates a pilot signal in a received signal. An SIR detection section 205 detects the reception quality of the demodulated pilot signal. An fd detection section 206 uses the demodulated pilot signal to detect a Doppler frequency. A request modulation system decision section 207 uses the reception quality of the pilot signal and the detected Doppler frequency to decide the modulation system requested to the base station unit. A command generating section 208 generates a command corresponding to the decided modulation system. An adaptive demodulation section 204 uses a demodulation system corresponding to the modulation system decided by the request modulation system decision section 207 to apply demodulation processing to the received signal.