A Novel Signal Processing Scheme for Static Person Localization Using M-Sequence UWB Radars

Abstract

Developments in sensing technology have shown that UWB radars are becoming increasingly valuable sensing devices that can be used for monitoring of humans in military/police and civilian areas. It is known that the applicability of particular methods of human localization depends on the character of persons' motion. With respect to this finding, the researchers' attention has been aimed at two fundamental directions. While the former is focused on the localization of moving persons (MP), the latter approach is intended to localize static persons (SP). Then, a proper fusion of the methods developed for MP and SP localization allows monitoring of persons moving with an unknown time-variable character of motion (MP-SP). The analyses of the currently known methods of MP and SP localization in terms of their use for MP-SP localization have shown that while MP localization methods are in principle well developed, SP localization methods are not sufficiently adapted for their use in MP-SP monitoring. Motivated by these findings, we would like to introduce a new radar signal processing procedure for SP localization (SPL) that could be an efficient component of algorithms to be applied for MP-SP monitoring. The novel features of the proposed SPL consist especially in a new approach to SP detection and inclusion of SP tracking in SPL. Moreover, SPL is characterized by relatively low computational complexity and is, therefore, suitable for real-time implementation. Experimental results have shown that SPL introduced in this paper provides very good performance for multiple person localization for line-of-sight and through-the-wall scenarios.

Positioning and Tracking of Multiple Humans Moving in Small Rooms Based on a One-Transmitter–Two-Receiver UWB Radar Configuration

“…In such a case, it is advantageous to combine the methodology of tracking moving and static persons (based on the detection of respiratory rate). For that purpose, we presented in our last article a novel signal processing scheme for static person localization using M-sequence UWB radars [ 62 ]. A suitable criterion that allows us to switch between these two approaches is to monitor the speed of tracked people—if a person moves at a sufficient speed, we follow him/her using a methodology designed for moving targets, if his/her speed falls below a defined level, we track him/her according to respiratory movements.…”

Enhancement of Vital Signals for UWB Through-Wall Radar Using Low-Rank and Block-Sparse Matrix Decomposition

“…In previous studies, various radar signal clutter suppression algorithms have been proposed to improve the SNR, such as eliminating the effects of stationary clutter in the echo signal [18][19][20]. For UWB impulse radar, the signals processed are time domain signals.…”

Persistent Homology Approach for Human Presence Detection from 60 GHz OTFS Transmissions

“…In the past ten years, there has been continuous research on replacing camera-based technology with their counterparts employing radio signal transmissions [ 1 ]. For example, Ultra Wide Band (UWB) [ 2 ] or Frequency-Modulated Continuous-Wave (FMCW) [ 3 ] signals were widely investigated to detect the presence and location of individuals or groups of persons.…”