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Sensors 2018, 18(9), 3065; https://doi.org/10.3390/s18093065

Experimental Study of Wireless Monitoring of Human Respiratory Movements Using UWB Impulse Radar Systems

1
Science and Technology on Electronic Test & Measurement Laboratory, The 41st Research Institute of CETC, Xiang Jiang Road 98th, Huangdao District, Qingdao 266555, China
2
China Electronics Technology Instruments Co. Ltd., Xiang Jiang Road 98th, Huangdao District, Qingdao 266555, China
3
The Key Laboratory of Electromagnetic Radiation and Sensing Technology, Institute of Electronics, Chinese Academy of Science, North 4th Ring West Road 19th, Haidian District, Beijing 100190, China
4
Department of Electrical Computer Engineering, University of Victoria, PO Box 1700, STN CSC, Victoria, BC V8W 2Y2, Canada
*
Author to whom correspondence should be addressed.
Received: 10 July 2018 / Revised: 15 August 2018 / Accepted: 22 August 2018 / Published: 12 September 2018
(This article belongs to the Section Remote Sensors)
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Abstract

This paper analyzes and discusses the capability of human being detection using impulse ultra-wideband (UWB) radar with an improved detection algorithm. The multiple automatic gain control (AGC) technique is employed to enhance the amplitudes of human respiratory signals. Two filters with seven values averaged are used to further improve the signal-to-noise ratio (SNR) of the human respiratory signals. The maximum slope and standard deviation are used for analyzing the characteristics of the received pulses, which can provide two distance estimates for human being detection. Most importantly, based on the two distance estimates, we can accurately judge whether there are human beings in the detection environments or not. The data size can be reduced based on the defined interested region, which can improve the operation efficiency of the radar system for human being detection. The developed algorithm provides excellent performance regarding human being detection, which is validated through comparison with several well-known algorithms. View Full-Text
Keywords: impulse ultra-wide band (UWB) radar; automatic gain control (AGC); interested region; human respiratory signals; interested region impulse ultra-wide band (UWB) radar; automatic gain control (AGC); interested region; human respiratory signals; interested region
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liang, X.; Wang, Y.; Wu, S.; Gulliver, T.A. Experimental Study of Wireless Monitoring of Human Respiratory Movements Using UWB Impulse Radar Systems. Sensors 2018, 18, 3065.

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