Frequency and amplitude estimation in microwave Doppler signal and its application to car driver's foot motion estimation

Aiming at car driver's motion estimation, foot motion estimation while no pedal operations has been investigated. We use a sensor utilizing Doppler effect in a microwave to detect motion of foot. Sinusoidal wave obtained from the sensor, we estimate time-varying frequency and amplitude of the wave by state space modeling approach with particle filter for state estimation. Furthermore, we devised a novel model for estimating position and velocity of the foot by incorporating pedal signal. Several experiments with Linear sliding machine for obtaining fundamental property and foot pedal have been reported.