MAXIMUM DOPPLER FREQUENCY ESTIMATION DEVICE AND RADIO COMMUNICATION DEVICE

PROBLEM TO BE SOLVED: To provide a maximum Doppler frequency estimation device capable of solely estimating maximum Doppler frequency fd related to the speed of fading fluctuation. SOLUTION: A pilot symbol data extraction unit 23 extracts symbol data, quadrature-demodulated and passed through a LPF(low-pass filter) 17. A change detection unit 24 detects a change in a phase region where the reception signal point of the extracted pilot signal locates. The reception signal point of the extracted pilot signal changes due to fading. A counter unit 25 counts the number of pilot symbols that changes within a preset observation time. A fd estimation value calculation unit calculates an estimated value of the maximum Doppler frequency fd from a relational equation between the ratio of the counted value to the total number of pilot symbols within the observation time and a preset maximum Doppler frequency fd.