HRP UWB 통신의 채널 특성 변화를 이용한 실내 사람 수 파악

Abstract

HRP UWB technology has recently attracted attention owing to its advantages of enabling precise distance measurements as well as communication. In addition to communication and distance measurement, passive radar applications that can recognize the surrounding situation are also being considered. Among these radar applications, the ability to detect the number of people indoors is of increasing interest when social distancing is important. In this study, we implemented an HRP UWB passive radar application system that detects the number of people in an indoor environment using the change in channel characteristics between HRP UWB communication devices. Using the implemented system, changes in the channel impulse response (CIR) characteristics of channels 5 and 9 were observed, and the number of people was identified using the singular vector decomposition (SVD) algorithm. From actual measurements, it was possible to confirm that the number of people within five people in an indoor environment could be accurately identified using a pair of HRP UWB wireless communication devices in an indoor environment.