Abstract: A method for measuring propagation delay characteristics in a multipath propagation environment, wherein the propagation delay characteristics are measured between a transmission means and a reception means provided in the multipath propagation environment, the method comprising a transmission step of transmitting a measurement signal comprising an information signal having a predetermined frequency from the transmission means; a reception step of receiving the measurement signal that has traveled along a plurality of propagation paths by the reception means; a calculation step of performing Hilbert transform on the received information signal to calculate instantaneous frequency characteristics from a resulting Hilbert transform signal; and an output step of outputting propagation delay characteristics corresponding to the frequency of the information signal based on the instantaneous frequency characteristics.