Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Xikun Hu; Tian Jin

doi:10.20944/preprints201608.0206.v1

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preprints.org > medicine and pharmacology > other > doi: 10.20944/preprints201608.0206.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Xikun Hu

and

Tian Jin

Version 1 : Received: 25 August 2016 / Approved: 25 August 2016 / Online: 25 August 2016 (08:57:22 CEST)
Version 2 : Received: 15 September 2016 / Approved: 15 September 2016 / Online: 15 September 2016 (11:24:00 CEST)
Version 3 : Received: 9 November 2016 / Approved: 10 November 2016 / Online: 10 November 2016 (07:13:01 CET)

A peer-reviewed article of this Preprint also exists.

Hu, X.; Jin, T. Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar. Sensors 2016, 16, 2025. Hu, X.; Jin, T. Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar. Sensors 2016, 16, 2025.

Abstract

The designed radar sensor realizes the healthcare monitoring capable of short-range to detect the chest-wall movement of the subject caused by cardiopulmonary activities, and wirelessly estimating the distance from the sensor to the subject without any devices being attached to the body. Ensemble empirical mode decomposition (EEMD) based denoise method and 1-D continuous-wavelet transform (CWT) are applied for improving on the detection SNR so that accurate respiration rate and heartbeat rate can be acquired in time domain or frequency domain with further distance. No choosing the conventional Doppler radar only able to capture the Doppler signatures due to the lack of bandwidth information as noncontact sensor, we take full advantages of ultra-wideband (UWB) impulse radar to make it low power consumed and portable conveniently, with flexible detection range and preferable accuracy. This noncontact healthcare sensor system addressed proves the commercial feasibility and vast availability of using compact impulse radar for emerging biomedical applications. Compared with traditional contact measurement devices, experimental results utilizing the 2.3 GHz bandwidth transceiver, demonstrate 100% similar results.

Keywords

impulse radar; ultra-wideband (UWB); noncontact; short-range; healthcare; respiration; heartbeat; SNR; ensemble empirical mode decomposition (EEMD); continuous-wavelet transform (CWT)

Subject

Medicine and Pharmacology, Other

Copyright: 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.

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