@article{ref1,
title="Quantitative gait measurement with pulse-Doppler radar for passive in-home gait assessment",
journal="IEEE transactions on bio-medical engineering",
year="2014",
author="Wang, Fang and Skubic, Marjorie and Rantz, Marilyn and Cuddihy, Paul",
volume="61",
number="9",
pages="2434-2443",
abstract="In this paper, we propose a Pulse-Doppler radar system for in-home gait assessment of older adults. A methodology has been developed to extract gait parameters including walking speed and step time using Doppler radar. The gait parameters have been validated with a Vicon motion capture system in the lab with 13 participants and 158 test runs. The study revealed that for an optimal step recognition and walking speed estimation, a dual radar set up with one radar placed at foot level and the other at torso level is necessary. An excellent absolute agreement with intra-class correlation coefficients of 0.97 was found for step time estimation with the foot level radar. For walking speed, although both radars show excellent consistency they all have a system offset compared to the ground truth due to walking direction with respect to the radar beam. The torso level radar has a better performance (9% offset on average) in the speed estimation compared to the foot level radar (13-18% offset). Quantitative analysis has been performed to compute the angles causing the systematic error. These lab results demonstrate the capability of the system to be used as a daily gait assessment tool in home environments, useful for fall risk assessment and other health care applications. The system is currently being tested in an unstructured home environment.<p /> <p>Language: en</p>",
language="en",
issn="0018-9294",
doi="10.1109/TBME.2014.2319333",
url="http://dx.doi.org/10.1109/TBME.2014.2319333"
}