METHOD FOR ESTIMATING MOVING SPEED OF TERMINAL USING DOPPLER SPECTRUM

摘要

PROBLEM TO BE SOLVED: To provide a moving speed estimation method that detects and eliminates Doppler spectrum components due to a peripheral moving scattering body.SOLUTION: A moving speed estimation method includes: a step of receiving a reference signal; a step of creating propagation path time fluctuation data from the reference signal; a step of performing FFT on the propagation path time fluctuation data; a step of calculating a Doppler spectrum from output of FFT; a step of setting a threshold and selecting valid components equal to or higher than the threshold; a step of detecting a first frequency of a component with the highest frequency and a second frequency of a component with the lowest frequency; a step of determining the maximum Doppler frequency from the first frequency and the second frequency; a step of determining a moving speed of a terminal; a step of storing the moving speed of the terminal; a step of comparing a plurality of moving speeds from the present time to a predetermined time therebefore so as to calculate the minimum moving speed; and a step of determining the calculated minimum moving speed as a moving speed at the present time.SELECTED DRAWING: Figure 10