Multiple static person localization based on respiratory motion detection by UWB radar

In the past few years, great efforts have been made to develop a methods for through-the-wall detection of the vital signs of a human being such as breathing or heart beating. For such purpose, UWB sensor (radar) operating within the frequency band DC-5 GHz can be used as proper technical tool. In contrast to moving target localization is this task much more challenging. The basic principle of a breathing motion detection by a radar consists in the identification of a raw radar signal components carrying a significant power within the frequency band from 0.2 Hz to 0.7 Hz. Respiratory motion detection is a known task analyzed by a variety of methods. However, the problem of person localization based on their respiratory motion detection has not been studied very properly. This paper is introducing a simple approach of respiratory motion detection based on Welch periodogram method with the two-stage detector with subsequent target localization. Performance of the procedure introduced here will be illustrated by the experimental results obtained for through-the-wall detection and localization of three static persons.