Decomposition of Respiratory and Cardiac Rates Using Dual Band Distributed Radar

Abstract

Respiratory and cardiac rates can be estimated by analyzing a spectrum of phase modulation in a radar echo of an individual. However, the phase modulations corresponding to respiratory and cardiac rates are linearly mixed in a radar echo, so cardiac rate estimation is significantly difficult because of high order harmonics of a respiratory rate. We exploit independent component analysis (ICA) method for effective decomposition of respiratory and cardiac rates with a dual band distributed radar. In simulations and experiments, the respiratory and cardiac rates were successfully estimated by proposed decomposition method, compared with conventional methods. © 2024 European Microwave Association (EuMA).