Open Access

A New Method for Identifying the Life Parameters via Radar

EURASIP Journal on Advances in Signal Processing20072007:031415

https://doi.org/10.1155/2007/31415

Received: 10 January 2006

Accepted: 6 October 2006

Published: 30 January 2007

Abstract

It has been proved that the vital signs can be detected via radar. To better identify the life parameters such as respiration and heartbeat, a novel method combined with several signal processing techniques is presented. Firstly, to improve the signal-to-noise ratio (SNR) of the life signals, the signal accumulation technique by FFT is used. Then, to restrain the interferences produced by moving objects, a dual filtering algorithm (DFA) which is able to remove the interferences by tracing the interfering spectral peaks is proposed. Finally, the wavelet transform is applied to separate the heartbeat from the respiration signal. The method cannot only help to automatically detect the existence of human beings effectively, but also identifying the parameters like respiration, heartbeat, and body-moving signals significantly. Experimental results demonstrated that the method is very promising in identifying the life parameters via radar.

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Authors’ Affiliations

(1)
The Key Laboratory of Education, Ministry of China, Xi'an Jiaotong University
(2)
Department of Biomedical Engineering, The Fourth Military Medical University

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Copyright

© Wang Jianqi et al. 2007

This article is published under license to BioMed Central Ltd. 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.