A joint localization and breathing rate estimation of static persons using UWB radar

In the past period, great efforts have been made to develop methods for people detection based on monitoring their respiratory motion using ultra-wide band sensors (radars). The basic principle of these methods consists in the detection of signal components of raw radar data possessing a significant power in the frequency band 0.1 Hz-0.7 Hz (a frequency range of human respiratory rate) for a constant range between the target and radar antennas. In the connection with the localization of people, a new requirement has been appeared. It has been requested not only to localize people, but also to estimate the frequency of their breathing. This finding may indicate health and psychological state of monitored persons. However, the problem of multiple persons localization associated with the estimation of their breathing rate has not been yet studied deeply. In order to fill this gap, a new radar signal processing procedure for a joint localization and breathing rate estimation of persons will be introduced in the paper. The performance of the proposed procedure will be illustrated by an experimental scenario intent on through-the-wall localization and respiratory rate estimation of two static persons using single ultra-wide band sensor employing one transmitting and two receiving antennas.